domator Posted December 16, 2003 Share Posted December 16, 2003 I did rebuild EA82T. It wasnt'n my old engine - I bought it as a core just for rebuild. So I know nothing about it's past.... (unfortunately) Heads were just plained - valves looked so nice that I decided not to touch it. I also left old lifters. After rebuilding engine had no compression at #2 cylinder and nearly no compression at #1. I took it of because I was sure it's lifters problem. I change all lifters and the problem stays.... No compression. I investigated problem deeper and It is intake valves (both cylinders) problem. They are open all the time!!!! Do you have any idea what I did wrong ? Maybe I changed someting or whatever.... Any IDEAS ???? Piotr Link to comment Share on other sites More sharing options...
MilesFox Posted December 16, 2003 Share Posted December 16, 2003 mayne they just stuck open. since you got the heads on, try to tap or wiggle them free. spray parts cleaner and penetrating lube on the valve stemsthem. once the engine runs, the oil flow and operation will free them up i have seen them stuck open. tapped them and the freed up, but head were off when i did so did the motor/heads sit for a while? with the intake off? Link to comment Share on other sites More sharing options...
electryc_monk Posted December 16, 2003 Share Posted December 16, 2003 I'd highly recomend a light acid brushing of Moly-B grease on all the oiled surfaces when you reassemble it. life is so fun as long as we can all hopefully get along..... Link to comment Share on other sites More sharing options...
domator Posted December 16, 2003 Author Share Posted December 16, 2003 The problem is different.... Everything is reassembled "oiled" and moves freely. When I take off camshaft and all that stuff - alle valves are closed. It looks like valve rods are too long.... Strange.... Link to comment Share on other sites More sharing options...
MilesFox Posted December 16, 2003 Share Posted December 16, 2003 well if its closed are you sure you are right on your timing marks. that i think would explain 2 open valves and the compression reading http://www.warpthree.com/milesfox/subaru/service/Timing%20Belt.htm Link to comment Share on other sites More sharing options...
domator Posted December 16, 2003 Author Share Posted December 16, 2003 I am sure it's (was) OK. Nevertheless - now - timing belts and valve cover are out. I turn camshaft (by hand) to get intake valve closed. I put pressed air into spark hole and it goes freerly throught intake valve. It is open all 360 deg. of turning Sorry for my english... Piotr Link to comment Share on other sites More sharing options...
Forkspear Posted December 18, 2003 Share Posted December 18, 2003 I just ran into this problem at my work last week on a 99 Crown Victoria cop car. There was no compression in one cylinder. I pulled off the intake manifold and when it cranked compression came back out through the intake port. The intake valve wasn't closing because it was dished. This makes the stem longer too. You probably have the same problem. Link to comment Share on other sites More sharing options...
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