how do these cr numbers look on a fresh motor? if not the rings, whats the problem?

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10-25-2003, 04:33 PM

crx1856

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how do these cr numbers look on a fresh motor? if not the rings, whats the problem?

#1 220,#2 200,#3 210,#4 220. this is on a fresh motor with 750 miles on it.(b16 84mm 9-5-1 cr.) my dyno results were low and the shops leak down test came up 3% on #3, 12%,12%,and 7%. i'm not sure what the percents were for the other cylinders. i'm trying to figure out if my rings didn't seat or if the problem is in the head.

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10-25-2003, 06:58 PM

Blown90hatcH

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Re: how do these cr numbers look on a fresh motor? if not the rings, whats the problem? (crx1856)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crx1856 »</TD></TR><TR><TD CLASS="quote">#1 220,#2 200,#3 210,#4 220. this is on a fresh motor with 750 miles on it.(b16 84mm 9-5-1 cr.) my dyno results were low and the shops leak down test came up 3% on #3, 12%,12%,and 7%. i'm not sure what the percents were for the other cylinders. i'm trying to figure out if my rings didn't seat or if the problem is in the head.
</TD></TR></TABLE>

The compression numbers look sufficient. But the leak down numbers for 2-3 are kinda high. I built my B18c about 1200 miles ago and did a leakdown a couple weeks ago. The results were 220, 220, 210, 220 and 2%, 2%, 3%, 2%. Can you hear where the air is leaking by? Out the intake side? Exhaust? Oilpan? Try and listen to see where it is comming from.