Do you have to replace the head gasket on a second generation Subaru?
The second-generation SOHC engines use the same fiber gasket but have an updated head torque procedure and if done correctly you should not have future headgasket problems. When replacing the headgasket(s) I almost always re-surface the cylinder head(s).
How do you replace a head gasket on a car?
Some head bolts cannot be reused and must be replaced. Follow the manual and manufacture requirements. Once all head bolts are out then lift the cylinder head off of the engine block. Look at the head surface and the block along with the gasket for the failure areas.
Where is the head gasket on a V-8 engine?
The head gasket is found between the engine block and the cylinder head or heads in a V-type engine. The gasket functions as a seal that prevents the combustion process from leaking into the coolant passages that surround each cylinder. In many cases, it seals oil passages from coolant passages so the fluids do not mix.
Why is the oil coming out of my headgasket?
The oil consumption problem is most likely caused from stuck piston rings and plugged oil drain back holes in the lower piston ring groove. Unlike most engines the pistons can easily be removed when the engine is removed and the cylinder heads off.
The second-generation SOHC engines use the same fiber gasket but have an updated head torque procedure and if done correctly you should not have future headgasket problems. When replacing the headgasket(s) I almost always re-surface the cylinder head(s).
Can a headgasket be replaced without removing the engine?
The engine is a lot easier to work on if it’s on an engine stand but it can be done without removing the engine. First off, the head bolts will not come out if done this way. They must be left in the cylinder head and make sure not to mix up the center two bolts, they are different and will not fit the outer cylinder head bolt holes.
The oil consumption problem is most likely caused from stuck piston rings and plugged oil drain back holes in the lower piston ring groove. Unlike most engines the pistons can easily be removed when the engine is removed and the cylinder heads off.
Why is my headgasket not working on my Subaru?
The intake valves and intake valve seats almost always look good unless the valve seals have been leaking oil which burns up the valve and will eventually cause it not to seal. When working on the VVT second-generation 2.5L SOHC engines valvetrain inspect the rocker arms closely, especially if they are close to 200K.