Mopar R8225257AA Head-Cylinder

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Following the removal of the primary timing chain and sprockets, proceed to remove the camshafts from the cylinder head.

Coat the head bolt threads with engine oil.

Loosen the camshaft sprocket bolt with a wrench while holding the sprocket hex and remove the camshaft thrust plate, allowing the camshaft to slide back.

Loosen the head bolts in 1/4-turn increments in the opposite pattern of the tightening sequence until they can be removed by hand, storing them in order to ensure proper reinstallation.

Loosen the cylinder head bolts in reverse order of tightening and lift the cylinder head off the block, using a wood block and hammer if necessary, while avoiding damage to the surfaces.

Use new camshaft sprocket bolts as the left and right sprocket bolts are not interchangeable.

Proceed to remove the upper and lower intake manifolds, ignition coils, spark plugs, exhaust manifold from the cylinder head, valve cover(s), rocker arms, shafts, and the timing belt along with its covers. Take note of the timing belt's direction of rotation if it is to be reused.

When lifting the heads off the engine, use a block of wood or strike a wood block with a hammer. Store the heads on blocks of wood to protect the gasket sealing surfaces.

Finally, refill the cooling system, change the engine oil and filter, start the engine, and check for oil and coolant leaks.

Yes, it's advisable to replace the head bolts with new ones.

Next, take off the valve covers, followed by the rocker arms and pushrods, ensuring all parts are kept in order for reinstallation.

Check each cylinder head bolt for stretching with a straightedge and replace if necessary.

Lift the heads off the engine using a block of wood or by striking a wood block with a hammer. Store the heads on blocks of wood.

To install the heads, ensure the mating surfaces are clean and free from old gasket material and dirt. Use a gasket scraper and brake cleaner to clean the surfaces. Check for any damage and remove it if necessary. Chase the threads in the head bolt holes and clean the bolt threads.

Disconnect the exhaust pipe from the turbocharger, remove the viscous fan and drive assembly, and raise the engine with support or a hoist. Remove the right engine mount through-bolt and the engine mount itself. Disconnect the turbo oil drain fitting and seal the openings. Disconnect the air intake temperature sensor wiring, remove the air filter housing and snorkel, and tape the open turbo port. Disconnect heater hoses, oil supply line, and coolant lines from the turbocharger, sealing the openings. Remove the EGR cooler, exhaust manifold with the turbo attached, fan and shroud assembly, and the drive belt. Lower the alternator, disconnect the upper radiator hose, and label and disconnect all wiring attached to the cylinder head. Remove the engine oil dipstick tube bolt, air intake housing, pump-to-fuel rail line, fuel rail-to-head lines, and fuel line shield. Remove the fuel injectors and rocker housing.

Finally, the timing chain guides, timing chains, and timing chain sprockets are installed, and the cooling system is refilled, with engine oil and filter changed, before starting the engine to check for oil and coolant leaks.

Cylinder head bolts should be checked for stretching, and if any threads do not contact a straight-edge, replacement is advised.

For installation, position the new head gasket over the dowels in the block, place the cylinder head over it without disturbing the gasket, and apply engine oil to the head bolt threads and underneath the bolt heads. Install the bolts in their original locations and tighten them following the recommended sequence to the specified torque.

After loosening the cylinder head bolts, you can lift the cylinder head off the block.

Take off the valve covers, rocker arms, and pushrods.

Remove the banjo bolt, sealing washers, and the fuel line from the rear of the head, then remove the fuel injectors. Remove the rocker housing and gasket. Loosen the head bolts in the reverse order of the tightening sequence, inserting each removed bolt into a cardboard template to keep track. Carefully pry between the head and block to break the gasket seal, then lift off the cylinder head, either with an assistant or using an engine lifting hoist. Inspect the head and remove any wiring harnesses or ground cables still attached.

Warpage of the cylinder head, as well as the head gasket, intake, and exhaust manifold surfaces, should be checked with consultation from an automotive machine shop.

To remove the cylinder head, you need to take off several components including the timing chain, oil control valves, timing chain tensioner, chain guides, camshafts, rocker arms, and lash adjusters.

Remove the banjo bolt, sealing washers, and the fuel line from the rear of the head, then remove the fuel injectors. Remove the rocker housing and gasket. Loosen the head bolts in the reverse order of the tightening sequence, inserting each removed bolt into a cardboard template to keep track. Carefully pry between the head and block to break the gasket seal, then lift off the cylinder head, either with an assistant or using an engine lifting hoist. Inspect the head and remove any wiring harnesses or ground cables still attached.

The cylinder head, with the camshaft in place and the exhaust manifold attached, should be carefully lifted off the engine block, and any external components should be removed for thorough cleaning and inspection.

Before starting, disconnect the batteries' negative terminals and drain the coolant.

For installation, position the new head gasket over the dowels in the block, place the cylinder head over it without disturbing the gasket, and apply engine oil to the head bolt threads and underneath the bolt heads. Install the bolts in their original locations and tighten them following the recommended sequence to the specified torque.

Before removing the cylinder head, you should disconnect all wires and vacuum hoses from the cylinder heads. Also, disconnect the ignition coils and spark plugs. Remove the catalytic converter(s), valve covers, crankshaft pulley, and oil pans.

Warpage of the cylinder head, as well as the head gasket, intake, and exhaust manifold surfaces, should be checked with consultation from an automotive machine shop.

Warpage of the cylinder head, as well as the head gasket, intake, and exhaust manifold surfaces, should be checked with consultation from an automotive machine shop.

Position the new gaskets correctly on the dowels in the block. Carefully place the heads on the block without disturbing the gaskets. Coat the head bolt threads with engine oil and install the bolts in their original locations. Tighten the bolts following the recommended sequence and torque specifications.

Take off the valve covers, rocker arms, and pushrods.

Depending on the cylinder head, you may need to remove other components like the alternator, transmission and oil dipstick tube, air conditioning compressor, or heater core tube. Additionally, the timing chain cover should be removed, and the crankshaft should be rotated to Top Dead Center (TDC).

To install the heads, ensure the mating surfaces are clean and free from old gasket material and dirt. Use a gasket scraper and brake cleaner to clean the surfaces. Check for any damage and remove it if necessary. Chase the threads in the head bolt holes and clean the bolt threads.

After loosening the cylinder head bolts, you can lift the cylinder head off the block.

Complete the remaining installation steps, which include changing the engine oil and filter, and refilling the cooling system. Finally, start the engine and check for leaks and proper operation.