Question 1

What precautions should be taken before beginning the Cylinder Head removal procedure in 5.7L, 6.0L, 6.2L V8 engine on Cadillac CTS?

Accepted Answer

This should be done when the engine of the car is cold; however, before working on the engine allow it to cool down completely. As with the previous work done, a new set of head bolts will be required for this to happen. Remove the connector from the negative terminal of the battery, and drain the water from the engine. For 5.7L and 6.0L engines remove the intake manifold and the coolant bleed pipe mounting bolts and pipe; for 6.2L engines remove the supercharger. There is no requirement of removing the exhaust manifold from RH cylinder head whereas LH exhaust manifold is required to be removed along with; valve covers, oil dipstick tube. Take out the rocker arms and the pushrods and it is important to keep all the parts in a manner that they will be placed back in the same way as they were removed. Remove the wiring connection from the back of the alternator, then un-bolt and take off the power steering pump along with its rear support from the left cylinder head but do not cut the hoses. In reverse order, rotate the head bolts in 114 turn for their loose and then be removed by hand but ensure that in the middle of the process take measurements on their length and sizes for the right installation of the new head bolts. Pull the heads off the engine gently and if there is friction use prybar or long screwdriver on the intake port, place the heads on wooden cradles to avoid damaging the gasket surfaces. The surfaces of the cylinder head and block must be perfectly clean before installation; it's also important not to scratch the aluminum with such a scraper. Examine the mating surfaces for nicks, deep scratches and other defects that, though may not be deep can be filed away while serious ones may need to be machined. If warpage is assumed, use the straightedge and calculate the angles of the warpage; if the angles exceed specified permissible limits auto-machinist's shop should be consulted. Wipe the mating surfaces and threads of the head bolts with a clean shop towel and brake system cleaner to clean it, and, thereafter, use a wire brush to remove the thread locking compound from 8 mm head bolts. Place the new gaskets over the dowels in the block with the mark concerning the front of the vehicle and then put the heads on the block keeping the gaskets intact. Apply an M8 thread locker of medium strength on the threads of the new 8 mm head bolts before placing them and tightening them with the finger; place new 11 mm head bolts, and similarly tighten them with the finger. Tightening the bolts as per the sequence suggested, tighten the bolts for 4 times or to a torque and angle of rotation as suggested. Replace new O-rings for the coolant bleed pipe and screw in place onto the cylinder heads fastening the bolts to the recommended torque. The remaining part of the installation is just the exact opposite of the removal process, which has been outlined above. Last of all fill with coolant then change the oil & filter, crank up the engine and inspection for proper operating condition and check for any signs of coolant or oil leakages.

Question 2

How to Replace the Cylinder Head in V8 engine on Cadillac Escalade?

Accepted Answer

For this procedure it will be necessary to acquire a new set of 11 mm cylinder head bolts. Start with the process of clearing out pressure on the fuel system, next step is the removal of the cable on the negative terminal of the battery and the draining of the cooling system as well. The intake manifold must be either unbolted or sometimes pulled off and for 5.3L and 6.2L engines, fuel rail(s) also to be disconnected from cylinder head(s). Remove the cylinder head bolts, exhaust manifold(s) and untighten but do not remove the exhaust pipe(s) from the exhaust manifold(s), then remove the valve cover(s) and the rocker arms and pushrods and lay them in order to assemble it back. Subsequently, take out the coolant air bleed pipe aside, the alternator with its bracket and lower the ground strap from the back of the left cylinder head. As for the right cylinder head, on 6.0L models, it is necessary to remove the dipstick tube and to disconnect the ground cables at the front of the cylinder head. Back off the head bolts in a counter-clockwise direction, one quarter turn at a time, in the reverse order that they have been tightened unbolt until they are easily removable, observe different length and sizes of bolts needed for replacement with the new ones. If the head has warped set it on the blocks of wood or if you need to remove it fully, then use pry bar or long screwdriver and lift it gently off the engine and store it properly in order not to spoil gasket sealing surfaces. As for the cylinder heads mating surfaces, they should be absolutely free of any contaminants, thus making use of gasket removal solvents and a gasket scraper in order to remove the carbon and the residual gasket material. It is recommended that the block and head mating surfaces be inspected for any sign of damage, and if there are slight imperfections then take the same emery cloth while in cases of a lot of damages, it is recommended that one takes a machine. Use a tap to chase the threads in the head bolt holes and if you do not have access to a tap then clean it with brake cleaner and compressed air as the last resort. Install the new gaskets on top of those dowels in the block, then put the heads on the block gently without moving the gaskets and put a medium strength thread locking compound on the threads of the new 8mm head bolts. Use the new 11 mm head bolts and tighten them only with your hand to a light torque and then use the recommended pattern to tighten the bolts in four passages to reach the required torque. Replace coolant pipe with new gaskets and tighten bolt and to complete the process reversed manner of its removal. Last of all pour coolant, replace the oil and filter, switch on the engine and look for normal signs and any signs of leakage.

OEM Cadillac Cylinder Head

84 Cylinder Heads found

Cadillac Cylinder Head Part Number: 12635548

Cadillac Cylinder Head Part Number: 12581870

Cadillac Cylinder Head Part Number: 12629455

Cadillac Cylinder Head Part Number: 12581538

Cadillac Cylinder Head Part Number: 12692322

Cadillac Cylinder Head Part Number: 12698291

Cadillac Cylinder Head, Passenger Side Part Number: 12686771

Cadillac Cylinder Head Part Number: 12679110

Cadillac Cylinder Head Part Number: 1626192

Cadillac Cylinder Head Part Number: 12629453

Cadillac Cylinder Head Part Number: 12676966

Cadillac Cylinder Head Part Number: 12626884

Cadillac Cylinder Head Part Number: 12684224

Cadillac Cylinder Head Part Number: 55504796

Cadillac Cylinder Head Part Number: 12677522

Cadillac Cylinder Head Part Number: 12611606

Cadillac Cylinder Head Part Number: 12692321

Cadillac Cylinder Head Part Number: 12684225

Cadillac Cylinder Head Part Number: 12729680

Cadillac Cylinder Head, Driver Side Part Number: 12656411

Cadillac Cylinder Head

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