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Location:
bris
Registered:
February 2003
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Re: Early symptoms of broken piston rings????
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Fri, 21 March 2003 04:40
 
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| oldcorollas wrote on Fri, 21 March 2003 14:16 |
thanks for your suggestions ppl,
there is only a little oil smoke, but it's under full load at high rpm, and is from the valve stel seals methinks. has been there since the rebuild.
compression is equal on all cylinders, at about 135psi (it sounds low but cam duration is 275/284) and is only 5psi down after a year.
there is more blowby than when built, but i keep being told that these engines always have a lot of blowby... hmmm
it's hard to tell if power is down atm.... i will do a leak down test and see how that turns out..
this all came about after hearing some new noises.... and seeing the pistons (ex-pistons?) from a certain toymods members old KE38 wagon.... 3 were burnt more than 10mm around the crown, _all_ rings were broken, 1 skirt was cracked and almost falling off 
it still ran tho, and didn't blow clouds of smoke, heh heh.
thanks again for the suggestions, i think a teardown may be the best way to check..
Cya, Stewart
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a teardown? thats a bit dramatic isnt it?
usually its just a bit of blueish/black smoke out the exhaust and a loss in compression, if you have a feel for your car you can actually feel it in 'spirited' downshifts...
also as someone already mentioned oil in the combustion chamber sparkplugs valves etc.
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