How to remove and install cylinder heads on Lincoln Town Car Overhead cam (OHC) engine?

The engine must be completely cool when the heads are removed. Failure to allow the engine to cool off could result in head warpage. Removal begins with disconnecting the cable from the negative battery terminal and removing the valve cover(s). Next, remove the intake manifold, timing chain cover, and timing chains. Use the required camshaft holding fixture to lock the camshafts in place. Leave the holding fixtures in place until after the reassembly is complete. Separate the exhaust manifold-to- exhaust pipe(s). Detach the positive battery cable bracket at the rear of the cylinder head. Loosen the nut and slide the positive battery cable bracket up and off the stud on the right side of the cylinder head. At the rear of the right cylinder head remove the ground strap. Disconnect the heater hose at the pipe fastened at the rear of the right side cylinder head. The pipe can remain attached to the head during removal. Remove the exhaust manifold(s), if desired. Remove the head bolts by loosening them 1/4 turn at a time. Lift the head(s) off the engine. Remove the old head gasket(s). Before removing, note which gasket goes on which side, they are different and cannot be interchanged. Cylinder head disassembly and inspection procedures are covered in detail. Installation begins with ensuring the mating surfaces of the cylinder heads and block are perfectly clean. Use a gasket scraper to remove all traces of carbon and old gasket material, then clean the mating surfaces with lacquer thinner or acetone. Check the block and head mating surfaces for nicks, deep scratches and other damage. Use a tap of the correct size to chase the threads in the head bolt holes. Make sure the new gaskets are on the correct cylinder banks. Position the new gasket(s) over the alignment dowels in the block. Before placing the cylinder heads back on the block, rotate the crankshaft counterclockwise, as you are facing the engine, so the keyway is in the 9 o'clock position. Carefully position the head(s) on the block without disturbing the gasket(s). Install the NEW head bolts and follow the recommended sequence and tighten the bolts, in three steps. The remaining installation steps are the reverse of removal. Change the engine oil and filter, then start the engine and check carefully for oil and coolant leaks.

How to remove and install the cylinder heads in V6 engine on Lincoln MKX?

This procedure must be only performed with the engine out of the car or with the hood open. First, reduce fuel system pressure, then separate the cable from the car's negative terminal. Discharge the cooling system and take out the engine. They continue to remove the intake manifold(s) and exhaust manifolds or even the turbochargers and then the valve covers. Camshafts and lifters should be taken off, then the drivebelt, and the drivebelt tensioner. Remove both Camshaft Position (CMP) sensors by loosening the correct bolts located at the rear of each cylinder head; also remove other electrical connectors from the heads and take time to use a marker to identify them so as to properly reinstall them. Technicians must sequentially and slowly unscrew the cylinder head bolts via a quarter-turn at a time and this must be done round the bolts in a manner that is opposite to the tightening pattern. Take off all bolts so that they are disposed because installation requires new bolts. Gently remove the cylinder head(s) from the engine utilizing a wood block and a hammer or other tools and place it/them on wooden blocks so that it would not be scratched. Cylinder head disassembly and inspection must only be done by a qualified automotive machine shop. For installation, the mating surfaces of the cylinder heads and the engine block must be free from any contamination; cover all holes to avoid contamination. If there is less than .005 inch of high or low, the heck of the engine block and the cylinder head will require filing if the alignment is less than .010 inch off, but if it is greater than .010, machining is necessary. Thread the remnant of the block head bolt holes with the help of a tap of the required size. Place the new gasket(s) squarely over the dowel pins on the engine block with the grain laid correctly. Using a great deal of care, place the cylinder head(s) on the engine bloc without shifting the position of the gasket(s) and coat the new cylinder bolts lightly with oil and screw them down until they are hand tight. What is important to bear in mind is that the cylinder head bolts are torque-to-yield type and should therefore be removed for re-use. Use a torque wrench, and breaker bar with torque angle adaptor, and tighten the bolts in the sequence, to the correct torque, as well as the recommended angle of rotation. The rest of the process is the reverse of dismantling in order. Last yet not least, replace the engine oil and filter and filled the cooling system reservoir then start the engine with an inspection of the oil and coolants leakage.

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134 Cylinder Heads found

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Lincoln Cylinder Head Assembly
Part Number: 6W7Z-6049-A
$605.57 MSRP: $824.62
You Save: $219.05 (27%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Cylinder Head Assy; Cylinder Head
- Manufacturer Note: Includes Valves And Camshaft
- Position: Passenger Side
- Replaces: 4L3Z-6049-AA, 1W7Z-6049-AARH
Fits the following Lincoln Models:
- Mark LT | 2010, 2006-2008 | 8 Cyl 4.6L Romeo SOHC EFI | 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R70E W/TSS, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 5-Speed Manual Transmission - Mazda M5R2-C, 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
- Town Car | 2001-2011 | 8 Cyl 4.6L, 8 Cyl 4.6L Romeo SOHC EFI | 4-Speed Automatic Transmission 4R70W (AODE), 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R70E W/TSS, 4-Speed Automatic Transmission AODEW/4R70E W/TSS*S/V, 4-Speed Automatic Transmission AODEW/4R75E W/TSS S/V, 4-Speed Automatic Transmission NAAO AODEW/4R70W*S/VIL, 4AT 4R70W, Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Lincoln Cylinder Head Assembly
Part Number: EJ7Z-6049-A
$840.94 MSRP: $1230.31
You Save: $389.37 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Cylinder Head Assy; Cylinder Head
Fits the following Lincoln Models:
- MKC | 2015-2019 | 4 Cyl 2.3L TIVCT DI TC | 6-Speed Automatic Transmission 6F Mid-Range, Four-Wheel Drive (Part Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Lincoln Cylinder Head Assembly
Part Number: BR3Z-6049-F
$971.81 MSRP: $1327.69
You Save: $355.88 (27%)
ADD TO CART
Product Specifications
- Other Name: Cylinder Head Assy; Cylinder Head
- Position: Driver Side
Fits the following Lincoln Models:
- Mark LT | 2011-2014 | 8 Cyl 5.0L MOD DOHC SEFI NA | 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R70E W/TSS, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 5-Speed Manual Transmission - Mazda M5R2-C, 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Lincoln Cylinder Head Assembly
Part Number: 4L3Z-6049-AA
$605.57 MSRP: $824.62
You Save: $219.05 (27%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Cylinder Head Assy
- Position: Passenger Side
- Replaced by: 6W7Z-6049-A
Fits the following Lincoln Models:
- Mark LT | 2006-2008 | 8 Cyl 4.6L Romeo SOHC EFI | 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R70E W/TSS, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 5-Speed Manual Transmission - Mazda M5R2-C, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
- Town Car | 2004-2011 | 8 Cyl 4.6L Romeo SOHC EFI | 4-Speed Automatic Transmission 4R70W (AODE), 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R70E W/TSS, 4-Speed Automatic Transmission AODEW/4R70E W/TSS*S/V, 4-Speed Automatic Transmission AODEW/4R75E W/TSS S/V, 4-Speed Automatic Transmission NAAO AODEW/4R70W*S/VIL, Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Lincoln Cylinder Head Assembly
Part Number: 9L3Z-6049-E
$2890.50 MSRP: $4247.69
You Save: $1357.19 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Cylinder Head Assy; Cylinder Head
- Manufacturer Note: Less Valves
- Position: Driver Side
Fits the following Lincoln Models:
- Mark LT | 2010-2014 | 8 Cyl 4.6L, 8 Cyl 5.4L | 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R70E W/TSS, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 5-Speed Manual Transmission - Mazda M5R2-C, 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
- Navigator | 2009-2014 | 8 Cyl 5.4L | 4-Speed Automatic Transmission E4OD(4R100), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission ZF 6HP26 Steptronic, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Lincoln Cylinder Head Assembly
Part Number: AL8Z-6049-A
$321.97 MSRP: $436.34
You Save: $114.37 (27%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Cylinder Head Assy; Cylinder Head
- Position: Passenger Side
- Replaces: 9L8Z-6049-A
Fits the following Lincoln Models:
- MKZ | 2010-2012 | 6 Cyl 3.0L OHC Duratec | 5-Speed Automatic Transmission Mazda FNR5, 5-Speed Manual Transmission (G5M), 6-Speed Automatic Transaxle - AWF21, 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Manual Transmission Mazda G6M, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Lincoln Cylinder Head Assembly
Part Number: 1F2Z-6049-BA
$537.33 MSRP: $776.77
You Save: $239.44 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Cylinder Head Assy; Cylinder Head
- Replaces: YF2Z-6049-BA
Fits the following Lincoln Models:
- Mark LT | 2006-2008 | 6 Cyl 4.2L OHV EFI | 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R70E W/TSS, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 5-Speed Manual Transmission - Mazda M5R2-C, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Lincoln Cylinder Head Assembly
Part Number: 9L3Z-6049-GB
$275.03 MSRP: $371.67
You Save: $96.64 (26%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Cylinder Head Assy; Cylinder Head
- Position: Passenger Side
- Replaces: 8L3Z-6049-B
Fits the following Lincoln Models:
- Mark LT | 2008 | 8 Cyl 5.4L | 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R70E W/TSS, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 5-Speed Manual Transmission - Mazda M5R2-C, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
- Navigator | 2008 | 8 Cyl 5.4L | 4-Speed Automatic Transmission E4OD(4R100), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission ZF 6HP26 Steptronic, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
View related parts
Lincoln Cylinder Head Assembly
Part Number: 6E5Z-6049-B
$735.77 MSRP: $1014.82
You Save: $279.05 (28%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Cylinder Head Assy; Cylinder Head
- Position: Passenger Side
Fits the following Lincoln Models:
- MKZ | 2007-2009 | 6 Cyl 3.0L DOHC EFI | 5-Speed Automatic Transmission Mazda FNR5, 5-Speed Manual Transmission (G5M), 6-Speed Automatic Transaxle - AWF21, 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Manual Transmission Mazda G6M, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
- Zephyr | 2006 | 6 Cyl 3.0L DOHC EFI | 5-Speed Automatic Transmission Mazda FNR5, 5-Speed Manual Transmission (G5M), 6-Speed Automatic Transaxle - AWF21, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Lincoln Cylinder Head Assembly
Part Number: 2L1Z-6049-DA
$905.31 MSRP: $1325.08
You Save: $419.77 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Cylinder Head Assy
- Position: Passenger Side & Driver Side
- Replaced by: 9C2Z-6049-EA
Fits the following Lincoln Models:
- Mark LT | 2006-2008 | 8 Cyl 4.6L Windsor SOHC EFI | 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R70E W/TSS, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 5-Speed Manual Transmission - Mazda M5R2-C, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
View related parts
Lincoln Cylinder Head Assembly
Part Number: 8L3Z-6049-B
$275.03 MSRP: $371.67
You Save: $96.64 (26%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Cylinder Head Assy
- Position: Passenger Side
- Replaced by: 9L3Z-6049-GB
Fits the following Lincoln Models:
- Mark LT | 2008 | 8 Cyl 5.4L | 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R70E W/TSS, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 5-Speed Manual Transmission - Mazda M5R2-C, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
- Navigator | 2008 | 8 Cyl 5.4L | 4-Speed Automatic Transmission E4OD(4R100), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission ZF 6HP26 Steptronic, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
View related parts
Lincoln Cylinder Head Assembly
Part Number: 1W7Z-6049-AARH
$605.57 MSRP: $824.62
You Save: $219.05 (27%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Cylinder Head Assy
- Position: Passenger Side
- Replaced by: 6W7Z-6049-A
Fits the following Lincoln Models:
- Town Car | 2001-2003 | 8 Cyl 4.6L | 4AT 4R70W
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Lincoln Remanufactured Cylinder Head Kit
Part Number: F4DZ-6V049-BRM
$225.49 MSRP: $306.31
You Save: $80.82 (27%)
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Product Specifications
- Other Name: Kit - Remanufactured Cylinder Head
Fits the following Lincoln Models:
- Continental | 1990 | 6 Cyl 3.8L | 4AT AXOD
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Lincoln Cylinder Head Assembly
Part Number: F4DZ6049C
$529.85 MSRP: $725.63
You Save: $195.78 (27%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: CYLINDER HEAD ASY; Cylinder Head
Fits the following Lincoln Models:
- Continental | 1994 | 6 Cyl 3.8L | 4AT AX4S, 4AT AXOD-E
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Lincoln Cylinder Head Assembly
Part Number: FT4Z-6049-F
$761.62 MSRP: $1113.54
You Save: $351.92 (32%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Cylinder Head Assy; Cylinder Head
- Position: Passenger Side
- Replaces: FT4Z-6049-A, FT4Z-6049-C
Fits the following Lincoln Models:
- Continental | 2017-2020 | 6 Cyl 2.7 L GAS, 6 Cyl 2.7L | 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Automatic Transmission 6F50, 6-Speed Automatic Transmission 6F55, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
- MKX | 2016-2018 | 6 Cyl 2.7L | 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Automatic Transmission 6F50, 6-Speed Automatic Transmission 6F55, 8-Speed Automatic Transmission 8F35, 8-Speed Automatic Transmission 8F57, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Lincoln Cylinder Head Assembly
Part Number: KT4Z-6049-D
$834.88 MSRP: $1118.62
You Save: $283.74 (26%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: CYLINDER HEAD ASY; Cylinder Head
- Replaces: KT4Z-6049-C, KT4Z-6049-A
Fits the following Lincoln Models:
- Nautilus | 2019-2023 | 6 Cyl 2.7 L GAS, 6 Cyl 2.7L | 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Automatic Transmission 6F50, 6-Speed Automatic Transmission 6F55, 8-Speed Automatic Transmission 8F35, 8-Speed Automatic Transmission 8F57, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Lincoln Cylinder Head Assembly
Part Number: HL3Z-6049-A
$1750.21 MSRP: $2396.92
You Save: $646.71 (27%)
ADD TO CART
Product Specifications
- Other Name: Cylinder Head Assy
- Position: Passenger Side
- Replaced by: HL3Z-6049-J
Fits the following Lincoln Models:
- Navigator | 2018-2019 | 6 Cyl 3.5L GTDI | 10-Speed Automatic Transmission (10R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
View related parts
Lincoln Cylinder Head Assembly
Part Number: EK4Z-6049-D
$673.11 MSRP: $983.23
You Save: $310.12 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Cylinder Head Assy; Cylinder Head
- Position: Driver Side
- Replaces: EK4Z-6049-B
Fits the following Lincoln Models:
- Mark LT | 2014 | 6 Cyl 3.7L PFI NA | 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R70E W/TSS, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 5-Speed Manual Transmission - Mazda M5R2-C, 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
- MKT | 2014-2019 | 6 Cyl 3.7L DOHC, 6 Cyl 3.7L PFI NA | 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Automatic Transmission 6F50, 6-Speed Automatic Transmission 6F55, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
View related parts
Lincoln Cylinder Head Assembly
Part Number: FT4Z-6049-C
$761.62 MSRP: $1113.54
You Save: $351.92 (32%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Cylinder Head Assy
- Manufacturer Note: Includes Valves And Springs Only
- Position: Passenger Side
- Replaced by: FT4Z-6049-F
Fits the following Lincoln Models:
- MKX | 2016-2018 | 6 Cyl 2.7L | 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Automatic Transmission 6F50, 6-Speed Automatic Transmission 6F55, 8-Speed Automatic Transmission 8F35, 8-Speed Automatic Transmission 8F57, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
View related parts
Lincoln Cylinder Head Assembly
Part Number: BR3Z-6049-E
$1112.93 MSRP: $1521.54
You Save: $408.61 (27%)
Product Specifications
- Other Name: Cylinder Head Assy; Cylinder Head
- Position: Passenger Side
Fits the following Lincoln Models:
- Mark LT | 2011-2014 | 8 Cyl 5.0L MOD DOHC SEFI NA | 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R70E W/TSS, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 5-Speed Manual Transmission - Mazda M5R2-C, 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)

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Lincoln Cylinder Head

Should you require any OEM Lincoln Cylinder Heads, feel free to browse through our comprehensive catalogue of genuine Lincoln Cylinder Heads. Not only do we offer these parts at market-leading prices, even outperforming the affordability of cheap aftermarket parts, but we also ensure rapid delivery and provide a manufacturer's warranty as standard.

Lincoln Cylinder Head Parts Questions & Experts Answers

Cylinder Head Assembly
F5AZ-6049-C
Q: How to remove and install cylinder heads on Lincoln Town Car Overhead cam (OHC) engine?
A:
The engine must be completely cool when the heads are removed. Failure to allow the engine to cool off could result in head warpage. Removal begins with disconnecting the cable from the negative battery terminal and removing the valve cover(s). Next, remove the intake manifold, timing chain cover, and timing chains. Use the required camshaft holding fixture to lock the camshafts in place. Leave the holding fixtures in place until after the reassembly is complete. Separate the exhaust manifold-to- exhaust pipe(s). Detach the positive battery cable bracket at the rear of the cylinder head. Loosen the nut and slide the positive battery cable bracket up and off the stud on the right side of the cylinder head. At the rear of the right cylinder head remove the ground strap. Disconnect the heater hose at the pipe fastened at the rear of the right side cylinder head. The pipe can remain attached to the head during removal. Remove the exhaust manifold(s), if desired. Remove the head bolts by loosening them 1/4 turn at a time. Lift the head(s) off the engine. Remove the old head gasket(s). Before removing, note which gasket goes on which side, they are different and cannot be interchanged. Cylinder head disassembly and inspection procedures are covered in detail. Installation begins with ensuring the mating surfaces of the cylinder heads and block are perfectly clean. Use a gasket scraper to remove all traces of carbon and old gasket material, then clean the mating surfaces with lacquer thinner or acetone. Check the block and head mating surfaces for nicks, deep scratches and other damage. Use a tap of the correct size to chase the threads in the head bolt holes. Make sure the new gaskets are on the correct cylinder banks. Position the new gasket(s) over the alignment dowels in the block. Before placing the cylinder heads back on the block, rotate the crankshaft counterclockwise, as you are facing the engine, so the keyway is in the 9 o'clock position. Carefully position the head(s) on the block without disturbing the gasket(s). Install the NEW head bolts and follow the recommended sequence and tighten the bolts, in three steps. The remaining installation steps are the reverse of removal. Change the engine oil and filter, then start the engine and check carefully for oil and coolant leaks.
Cylinder Head Assembly
DG1Z-6049-C
Q: How to remove and install the cylinder heads in V6 engine on Lincoln MKX?
A:
This procedure must be only performed with the engine out of the car or with the hood open. First, reduce fuel system pressure, then separate the cable from the car's negative terminal. Discharge the cooling system and take out the engine. They continue to remove the intake manifold(s) and exhaust manifolds or even the turbochargers and then the valve covers. Camshafts and lifters should be taken off, then the drivebelt, and the drivebelt tensioner. Remove both Camshaft Position (CMP) sensors by loosening the correct bolts located at the rear of each cylinder head; also remove other electrical connectors from the heads and take time to use a marker to identify them so as to properly reinstall them. Technicians must sequentially and slowly unscrew the cylinder head bolts via a quarter-turn at a time and this must be done round the bolts in a manner that is opposite to the tightening pattern. Take off all bolts so that they are disposed because installation requires new bolts. Gently remove the cylinder head(s) from the engine utilizing a wood block and a hammer or other tools and place it/them on wooden blocks so that it would not be scratched. Cylinder head disassembly and inspection must only be done by a qualified automotive machine shop. For installation, the mating surfaces of the cylinder heads and the engine block must be free from any contamination; cover all holes to avoid contamination. If there is less than .005 inch of high or low, the heck of the engine block and the cylinder head will require filing if the alignment is less than .010 inch off, but if it is greater than .010, machining is necessary. Thread the remnant of the block head bolt holes with the help of a tap of the required size. Place the new gasket(s) squarely over the dowel pins on the engine block with the grain laid correctly. Using a great deal of care, place the cylinder head(s) on the engine bloc without shifting the position of the gasket(s) and coat the new cylinder bolts lightly with oil and screw them down until they are hand tight. What is important to bear in mind is that the cylinder head bolts are torque-to-yield type and should therefore be removed for re-use. Use a torque wrench, and breaker bar with torque angle adaptor, and tighten the bolts in the sequence, to the correct torque, as well as the recommended angle of rotation. The rest of the process is the reverse of dismantling in order. Last yet not least, replace the engine oil and filter and filled the cooling system reservoir then start the engine with an inspection of the oil and coolants leakage.