Bad compression in #4
Thread Starter
Joined: Jun 2004
Posts: 5
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From: Euless, TX, USA
Bad compression in #4
I just randomly did a compression test to see how my engines doing. Here are the results...
All done dry
#1 185
#2 190
#3 185
#4 50
I redid #4 with a few drops of oil and it went up to ~52 psi. So I'm pretty sure it's not worn down rings causing low compression.
I have a 2000 Civic SI with 135,000 Miles. Mods on the car are intake, header, ctr cams, itr springs, and full exhaust with test pipe. I did the valve adjustment about a month ago and there are no ticking valves. The engine is running fine, doesn't lag at all, and there is no smoke in the exhaust.
All done dry
#1 185
#2 190
#3 185
#4 50
I redid #4 with a few drops of oil and it went up to ~52 psi. So I'm pretty sure it's not worn down rings causing low compression.
I have a 2000 Civic SI with 135,000 Miles. Mods on the car are intake, header, ctr cams, itr springs, and full exhaust with test pipe. I did the valve adjustment about a month ago and there are no ticking valves. The engine is running fine, doesn't lag at all, and there is no smoke in the exhaust.
Honda-Tech Member
Joined: Dec 2004
Posts: 324
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From: twin cities, MN
Re: Bad compression in #4 (Runnerdown)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Runnerdown »</TD></TR><TR><TD CLASS="quote">A few drops of oil will just sit on top of the piston. About a spoonful should be enough to get against the walls where it should be.</TD></TR></TABLE>
about a teaspoon is all you need. i suspect bent valves or broken valve springs. a leak down test with a vacuum test will lead you to the problem.
about a teaspoon is all you need. i suspect bent valves or broken valve springs. a leak down test with a vacuum test will lead you to the problem.
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May 22, 2003 10:29 AM