Hydralic lash Adj.

[swilde20]

Has there been a post that explains how to remove, bleed, and replace Hydralic lash Adj on a 95 2.2 engine. I can't find them anywhere in my Haines manual.

 

Thanks Steve

[ocei77]

Use link for FSM for your model year.

You will find all info you need there.

http://www.main.experiencetherave.com/subaru_manual_scans/

O.

[ShawnW]

Pretty rare to see them fail but its possible. Estimate 250K miles before needing to consider it if you ask me. If you haven't already checked the back plate on the oil pump I would do that first along with cleaning the pressure relief valve on the pump as well while you are in there.

[johnceggleston]

i think my haynes manual had something, how ever limited, about them.

 

HLAs are the hydraulic valve adjusters. they use oil pressure to keep the valve adjustment correct. they are in the rocker assembly on the heads, under the valve cover.

 

if yours are noisy, you may have low oil pressure. if this is an engine swap i would just let it idle. i've done 2 and one sounded so bad i thought it was a rod. but both quieted down over time with letting the engine run.

 

the HLAs are pressed into place in the rocker arm, no tools needed and are easy to remove. be careful not to ''scar'' them with pliers. there is a small ''one way'' ball valve that lets oil in. if you use a tooth pick or the like to press in the ball the valve will open and oil can flow in and out. submerge the HLA in a small container of clean oil. press in the ball valve and then work the piston in and out. dirty oil will probably come out. keep working it until there is no more dirty oil.

 

remove it from the oil bath and see if the piston is now firm. if it is soft, the hla is probably bad.

 

there is a bolt tightening procedure for the rocker arm assembly. if bleeding these was a common need, the advice would be to do it with the engine out of the car before the swap. but usually they quiet down on their own.

 

that's all i remember.