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Old 04-03-2017, 11:16 AM   #1
cshanek
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Join Date: Mar 2017
Location: Colorado Springs, Co
Posts: 38
Exclamation Burning oil and compression test results

Good localtime forum friends,

I created a post a couple weeks back (http://67-72chevytrucks.com/vboard/s...d.php?t=733313) regarding my 64 C20 (283), and how she appears to be burning oil to the tune of a quart every 50 miles or so. I performed a compression test this weekend on a cold-ish engine and here are my results:

1. 120 PSI - 6 revs
2. 125 PSI - 6 revs
3. 125 PSI - 6 revs
4. 130 PSI - 5 revs
5. 125 PSI - 5 revs
6. 125 PSI - 5 revs
7. 130 PSI - 6 revs
8. 120 PSI - 5 revs

I performed the above test with a couple of squirts of oil added to the chamber, and the numbers were similar, though it often took 8-10 revs to max out pressure.

So my question is, do these number make sense if I am burning oil? I thought for sure I would be low on a cylinder or too, but these numbers look pretty awesome. I have white smoke coming out of my pipe when I drive her around and I do not seem to be leaking a lot of oil. What could be the culprit?

I learned this weekend that I def have matching numbers, and I know that doesn't matter so much for old trucks, but I would like to fix my stock 283 instead of throwing in a 350 crate.

Last edited by cshanek; 04-03-2017 at 12:25 PM.
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