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cam belt?
Posted: Mon Apr 21, 2008 5:13 pm
by dibs
hi guys
If a cam belt breaks or a tentioner lets go will a valve hit a piston . Or is there clerance for this not to happen. Thats on this vortex im trying to get 1800 turbo
ta dibs
Posted: Mon Apr 21, 2008 5:25 pm
by INEEDABEER
I think EA2's are safe.EJ's definitely are not.
Posted: Mon Apr 21, 2008 7:02 pm
by CPOCSM
The EA's are definitely safe. I seized a tensioner on mine and the belt broke - lots of swearing and a towtruck!!! Engine lived to fight another day.
Hooroo
Posted: Mon Apr 21, 2008 7:20 pm
by Battlewagon
Snapped an idler pulley bolt on my EA82 and the engine lived, but I fitted new belts anyways. Just in case they were damaged.
Posted: Mon Apr 21, 2008 7:27 pm
by Matatak
EA82 are definetely safe yes.
BUT the EA82T's ive always been told are not
Posted: Mon Apr 21, 2008 7:38 pm
by Gannon
All EA82's are interference free, EA82T's have a bigger dish in the piston so definitely no problem there.
Some early EJ's with the SOHC heads were non interference too, apparently
Posted: Sat Apr 26, 2008 7:40 am
by SUBYDAZZ
EJ22 is non-interference.
Posted: Sat Apr 26, 2008 1:54 pm
by Redroo
Sorry, minor hijack
Would flat top pistons affect the clearance on the EA82?
Mark
Posted: Sat Apr 26, 2008 2:11 pm
by CPOCSM
nope...if you are still squeamish...put some plasticine on the crowns and check yourself...peace of mind
Hooroo
Posted: Sat Apr 26, 2008 5:58 pm
by littlewhiteute
CPOCSM wrote:nope...if you are still squeamish...put some plasticine on the crowns and check yourself...peace of mind
Hooroo
You should use light valve springs (SU carb springs or similar) in a mockup build to check for valve to piston clearance,
and a dial indicator will show how much additional valve lift as piston nears TDC.
Allow for compressed head gasket thickness.
Posted: Sat Apr 26, 2008 7:23 pm
by Gannon
Why are you worried?
Even engines with valves that interfere with the piston run ok as long as the cam timing is right.
Because of the EA82's deep and narrow 'bathtub' combustion chamber, i doubt any valve will ever hit any piston as the piston is only as high as the deck of the block at TDC