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98 RS coupe
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Discussion Starter #1 (Edited)
New guy to the forum! As a background I bought a 1998 Rs about two years ago from here and this is my first post! This site has been an invaluable resource for me and my car! Thanks!
To the point, I had my car come out of time after a snow storm here in central New York that compacted my entire engine bay with snow and I ended up bending two valves!? I was plowing snow with the bumper!
As a background, I have re-timed my car three prior times to this incident with success. I have replaced the head gaskets after the exhaust decided to fill my coolant system with the Subaru multi ply metal gaskets, I have replaced all the idler pulleys, belt tensioner, and water pump.
The car is a dohc(as you would expect) and after timing the car to the timing marks with no success I tried timing it to a tooth count of 54.5 to the passenger side intake gear, 51 teeth to the drivers side intake gear and 28 teeth from each intake gear to the exhaust gear. Then I tried advancing both cams on the passenger side with no luck and the retarding bot cams on the passenger side with no luck. My best compression test yielded 35 psi in either passenger side cylinder.
I then pulled the passenger side head off and found one small scuff mark on each cylinder from 1 of the exhaust valve, per cylinder.
I noticed the two valves that made the scuff marks on the pistons were not sitting in the valve seats properly, hence why it only yielded a 35 psi compression test at best.
My question is how does this physically happen!? I'm positive both exhaust valves open at the same time in each cylinder, but only 1 valve in each cylinder actually contacted the piston. If you guys have any input it would be greatly appreciated!
I'm going to replace all 4 exhaust valves when the parts come in and it should fix my problem.
 

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I kill threads!
2000 Ver 6 STI - 1996 Gravel Express
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3,749 Posts
Valves weren't adjusted properly, so one sat lower than the other. That's my guess.
 
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