Lump Posted June 1, 2009 Share Posted June 1, 2009 Hey Guys The 350 Chev V8 in the Jag has been oil fouling its plugs (from memory 3,4 and 8 were the worst - I changed them a few weeks ago). I did a compression test today and found all the plugs slightly oil fouled - except for 3 which was quite bad. The results are below. Results Cyl Dry Wet 1 160 160 2 150 150 3 140 155 4 130 150 5 150 155 6 155 160 7 150 150 8 130 130 I'm guessing worn rings on 3 and 4 and possibly a bad exhaust valve on number 8. I've never done one of these tests before are the results bad enough to justify doing the rings? Also are the compression readings meant to drop after doing a dry test, they remained static on all the wet tests? Quote Link to comment Share on other sites More sharing options...
Unclejake Posted June 2, 2009 Share Posted June 2, 2009 Those results aren't that bad. I would just roll it as it is but consider smacking some hotter plugs in. Quote Link to comment Share on other sites More sharing options...
forced Posted June 2, 2009 Share Posted June 2, 2009 The time to do rings would be when you get pissed off leaving a cloud of smoke behind when you floor it.Attracting the cops too. Steve Quote Link to comment Share on other sites More sharing options...
Lump Posted June 4, 2009 Author Share Posted June 4, 2009 Cheers Guys, I'll try some hotter plugs the next time. She does burn a fair amount of oil (about 1 litre per 330km's) but never blows any smoke!? All the spark plugs were slightly oily when I removed them to check the compression (they'd only been in there a week), could it be the valve stems or something else? Quote Link to comment Share on other sites More sharing options...
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