Question 1

What precautions should be taken when removing cylinder heads in V8 engine on Lincoln Navigator?

Accepted Answer

It is imperative that the engine be cold when removing the cylinder heads, in a bid not to have them warped. Cylinder head removal is one of the most complex procedures, which calls for several special tools, so, one has to prepare the tools in advance. Hence for models from 2003 and onward, it is advised that the engine be detached from the car during this operation. First of all, connect the negative battery terminal and remove its cable, and then drain the cooling system of the vehicle. After that, the valve covers and intake manifold should be taken off, next the exhaust manifolds and the cover of timing chain. The cylinder heads can be removed still with the camshafts, the rocker arms as well as the lash adjusters in place but you have to clear the timing chains, and their respective tensioners and guides. Camshaft retaining fixtures should be used to secure the camshafts in position as the engine block is assembled. In case a cylinder head rebuild is to be performed, it is necessary to take off the rocker arms and camshafts. Tighten the cylinder head bolts a specified number of torques in reverse order with a breaker bar, and pry the gasket joint using a pry bar at the corners of the mating surface. Remove the cylinder head(s) of the engine by slightly lifting them up using a wood block and a hammer at the same time and place the head(s) on wood blocks so as not to dent. Lift off the cylinder head gaskets and pay attention to the fact that some of them are unique to their positions. During installation a new set of cylinder head bolts are required to avoid leakages in addition to damage on the car. The mating surfaces must be clean; they may be scraped lightly with a gasket scraper and wiped with a solvent; other parts of the engine should be covered to shield them from dirt. Inspect the access faces of the parts to be joined in order to look for any signs of damage that may be present after the previous process; complete the holes with a thread, turning them with a tap. SupPOSE that camshafts remain in the engine: place the new gaskets strictly over the alignment dowels and make sure that the camshafts are in the original TDC. Place the cylinder heads as not to damage the gaskets and put new cylinder head bolts then tighten the nuts in the right sequence by use of a torque wrench and a breaker bar coupled with a torque-angle shade. Lastly, perform the other remaining steps in the reverse order, replace the engine oil and filter, crank the engine and check for any sign of leakage.

Question 2

How to reassemble a clean cylinder head after valve service on Lincoln Town Car?

Accepted Answer

Regardless of whether or not the head was sent to an automotive repair shop for valve servicing, make sure it's clean before beginning reassembly. If the head was sent out for valve servicing, the valves and related components will already be in place. On all engines, lubricate and install the valves, then install new seals on each of the valve guides. Using a hammer and deep socket, gently tap each seal into place until it's seated on the guide. On OHC engines, reinstall the valve lifters. Beginning at one end of the head, lubricate and install the first valve. Apply moly-base grease or clean engine oil to the valve stem. Drop the spring seat or shim(s) over the valve guide and set the valve spring, retainer (or rotator) and sleeve (if used) in place. Apply a small dab of grease to each keeper to hold it in place. Compress the springs with a valve spring compressor and carefully install the keepers in the upper groove, then slowly release the compressor and make sure the keepers seat properly. Repeat the procedure for the remaining valves. Be sure to return the components to their original locations - don't mix them up! Check the installed valve spring height with a ruler graduated in 1/32-lnch increments or a dial caliper. If the head was sent out for service work, the installed height should be correct. The measurement is taken from the top of each spring seat or shim(s) to the bottom of the retainer. If the height is greater than the figure, shims can be added under the springs to correct it. Caution: Don't, under any circumstances, shim the springs to the point where the installed height is less than specified. Apply moly-base grease to the rocker arm faces and the fulcrums, then install the rocker arms and fulcrums on the cylinder head studs.

OEM Lincoln Cylinder Head

68 Cylinder Heads found

Lincoln Cylinder Head, Driver Side Part Number: 6E5Z-6049-A

Lincoln Cylinder Head, Passenger Side Part Number: 9L3Z-6049-C

Lincoln Cylinder Head Part Number: NL3Z-6049-C

Lincoln Cylinder Head Part Number: L1MZ-6049-H

Lincoln Cylinder Head Part Number: L1MZ-6049-K

Lincoln Cylinder Head Part Number: 9U7Z-6049-B

Lincoln Cylinder Head, Passenger Side Part Number: DG1Z-6049-A

Lincoln Cylinder Head, Driver Side Part Number: AA5Z-6049-D

Lincoln Cylinder Head Part Number: KT4Z-6049-E

Lincoln Cylinder Head Part Number: NL3Z-6049-D

Lincoln Cylinder Head Part Number: KT4Z-6049-D

Lincoln Cylinder Head Part Number: DL3Z-6049-B

Lincoln Cylinder Head Part Number: HL3Z-6049-L

Lincoln Cylinder Head, Driver Side Part Number: 9L3Z-6049-K

Lincoln Cylinder Head, Passenger Side Part Number: GB8Z-6049-F

Lincoln Cylinder Head, Driver Side Part Number: GB8Z-6049-G

Lincoln Cylinder Head Part Number: CJ5Z-6049-C

Lincoln Cylinder Head Part Number: LX6Z-6049-A

Lincoln Cylinder Head, Driver Side Part Number: 3W4Z-6049-ACLH

Lincoln Cylinder Head Part Number: 8R3Z-6049-C

Lincoln Cylinder Head

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