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'91 305 burning oil
rustyrooster
Member Posts: 2
I'm thinking of buying a 1991 caprice with 305 TBI. It's only got 70,000 miles and it burns oil. What's the most likely source of this for these cars and how would I detect it ?
I know my 87 camaro 5.7 burned oil and it had fairly low mileage. I seem to recall that chevy had a problem with valve oil-seals. I never got around to replacing the oil seals before selling it.
If I check the compression, I could still get a high reading since the compression rings would be ok, but the oil ring(s) shot.
At least 1 plug is oil-fouled.
I know my 87 camaro 5.7 burned oil and it had fairly low mileage. I seem to recall that chevy had a problem with valve oil-seals. I never got around to replacing the oil seals before selling it.
If I check the compression, I could still get a high reading since the compression rings would be ok, but the oil ring(s) shot.
At least 1 plug is oil-fouled.
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Are there any other chevy discussion groups around ? I've been to gmforums.com, and searched the newsgroups. I can't believe there aren't more active discussion groups ... esp. more technical ones. Thanks.
Bad seals or guides would usually manifest symptoms like lots of smoke on cold start, but the smoke should diminish as the engine warms up--except for high vacuum situations.
Bad rings usually cause blue smoke under all conditions, and you might even see blow-by if you remove the oil filler cap, as well as a grungey air filter as blow-by comes through the PCV valve.
It would be good to do a leakdown, since you don't want to put new heads on an engine with a weak lower end anyway.
and they can't blame you for "wrecking my car by pulling the heads" with the gizmo if they are less than upfront moral citizens
oh, wait, it's always the Psycho Fiends Network that calls me. never mind....