Scion 11101-39776 Head Sub-Assembly, Cylinder

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Before removing the engine, set the fuel pump pressure to zero then disconnect the terminal on the battery's negative side. Dispose of the coolant, and unbolt the engine to take it out of the car. Next, one removes the drivebelt and alternator, then the valve cover as well out of the car. The final steps involve the removal of throttle body, fuel injectors and fuel rail, furthermore, the intake and exhaust manifolds should be disconnected. Continue with the dismantle of the timing chain and the camshaft sprockets and then the camshafts, the lifters and a camshaft housing. Remove the coolant hoses and electrical connections from the cylinder head and label for identification. A 10 mm hex-head socket bit with a breaker bar is needed to loosen it in an anti-clockwise way in a turn by turn procedure which should be simple to remove by hand, however, it is required to remove it in a reverse of the tightening sequence given so it is not warped or cracked. Raise the cylinder head off the engine block using a giddier, if necessary, and take out any further exterior fixtures for deep washing as well as checking. When installing the mating surfaces of the cylinder head and block have to be free of any carbon or any remains of the previous gasket and for that gasket scraper and brake system cleaner have to be used. The cylinders have to be plugged with clean shop rags to ensure that no foreign material gets inside the cylinders, in case of accumulation of material in the cylinders it can be vacuum cleaned. The mating surfaces of the block and cylinder head should be inspected, and this can be done, and corrected with a file if they are slightly raised, or brought to a machinist for further work if severely raised. Tap a thread of the correct size in the cylinder head bolt holes and using the compressed air, clean the holes with appropriate protection of the eye. Put back the components taken from the cylinder head, align the new gasket with the dowel pin hole in the block and spread the RTV sealant to the ends of the cylinder head gasket. Place the cylinder head back on the block without shifting the gasket as you tighten the head bolts in a star pattern until they are tightened hand-tight with clean engine oil put on the threads of the bolts and under the bolt heads new cylinder head . Perform the subsequent steps in the given order to apply the force and tighten the bolts to the prescribed torque. The rest of the installation process is the exact opposite of the removal process. This should be followed by at least one day before oil and coolant replenishment and starter motoring as well as looking for leaks and, finally, changing the engine oil and filter, refilling the cooling system, running the engine, and checking for leaks.

Start by taking out the camshafts and camshaft housings, followed by the exhaust manifolds.

To remove the cylinder head:Loosen the cylinder head bolts in 1/4-turn increments using a 10 mm hex-head socket bit and a breaker bar.Lift the cylinder head off the engine block.Remove any remaining external components for cleaning and inspection.

For 2009 and earlier models, you should also:Check and adjust the valves as necessary.Change the engine oil and filter.Refill the cooling system.Run the engine and check for leaks.

Position the new gaskets over the dowel pins in the block, ensuring they are right side up and aligned correctly.

The mating surfaces of the cylinder heads and the block must be perfectly clean.

If the left cylinder head is being installed, include the two front head bolts. If both cylinder heads were removed, install the other cylinder head.

Use a gasket scraper to remove all traces of carbon and old gasket material, then clean the mating surfaces with brake system cleaner.