Ford 3L3Z-6507-BA Inlet Valve

Because of the work challenge and given the fact that the work requires the use of specialized tools and equipment, it is recommended that the main work of cutting and grinding of the valves, the seats and the guides as they are widely referred to as the 'valve job', should best be done by a professional. It is easier for a home mechanic to pull the head, preliminary wash and examine the head and then take the head to a dealer service department or an automotive machine shop for the real service to be done on it. Performing the inspection enables identification of the state of the head and valve train parts and be aware of required work and new parts when interacting with an automotive machine shop. The dealer service department or the automotive machine shop will perform the valve and spring removal, valve and valve seat reconditioning or replacement, valve guide reconditioning, valve spring, spring retainer, rotator and keeper inspection and replacement when necessary, valve seal replacement, reconstruction of valves and valve components, and determination of the installed spring height. Also the surface of the cylinder head gasket will be ground if it is warped. After the valve job is done by a professional the head turn out to be like new with no or with negligible wear possible. After removal, it must be cleaned for the second time and, before being put in place on the engine, a thorough removal of any metal chips and other abrasive particles resulting from the valve work or the honing of the head must be accomplished with the aid of compressed air to clear all the oil ways and holes.

It is important to check the valve clearances with the help of a cold engine. It is recommended that the valve clearances be checked and altered only after the camshaft(s) or any other related valve parts have been replaced, or when there is much rumbling noise in the valve-train. Start from disconnecting the cable that is connected to the negative terminal of the battery next is remove the spark plugs and the valve covers. Position the engine with the crankshaft pulley center bolt on the cylinder to be checked until cam lobes are out of the lifters as possible using socket and breaker bar. Gauge the clearance of each valve with a feeler gauge of the specified thickness; slight drag on the feeler gauge will tell that the clearance is correct. Record any valve which is out of specification as this will form part of the analysis when estimating the number of required replacement lifters. Again we shall repeat the same process for all the valves. Any of the clearance that exist must be adjusted by replacing the lifter with a new lifter whose thickness head is of a different measure. Stoke the lifters to be replaced and record their assorted valves. Head thickness of each lifter is to be measured using the micrometer on the center projection on the underside for accuracy. To calculate the correct thickness for a replacement lifter that will achieve the specified valve clearance, use the formula: A new lifter thickness would therefore be calculated as: N equal R + (M1-M2) These lifters are stamped on the bottom to show their size such a code 3.310 means the thickness is 3.31mm or 0.13 inch. This lifters are then marked according to their installation location, then applied with engine assembly lube and finally installed. To rectify the problem replace the lifters, reset the camshafts and timing chains and after that adjust the valve clearances.

Because of the work challenge and given the fact that the work requires the use of specialized tools and equipment, it is recommended that the main work of cutting and grinding of the valves, the seats and the guides as they are widely referred to as the 'valve job', should best be done by a professional. It is easier for a home mechanic to pull the head, preliminary wash and examine the head and then take the head to a dealer service department or an automotive machine shop for the real service to be done on it. Performing the inspection enables identification of the state of the head and valve train parts and be aware of required work and new parts when interacting with an automotive machine shop. The dealer service department or the automotive machine shop will perform the valve and spring removal, valve and valve seat reconditioning or replacement, valve guide reconditioning, valve spring, spring retainer, rotator and keeper inspection and replacement when necessary, valve seal replacement, reconstruction of valves and valve components, and determination of the installed spring height. Also the surface of the cylinder head gasket will be ground if it is warped. After the valve job is done by a professional the head turn out to be like new with no or with negligible wear possible. After removal, it must be cleaned for the second time and, before being put in place on the engine, a thorough removal of any metal chips and other abrasive particles resulting from the valve work or the honing of the head must be accomplished with the aid of compressed air to clear all the oil ways and holes.

N equals R plus (M1 minus M2) Where. N equals thickness of new tappet R equals thickness of old tappet M1 equals measured valve clearance M2 equals standard valve clearance.