when u have bad rings, will a compression test tell u? or do u have to do a leak down test? also, say u had a motor with bad rings, is it possible to have all 4 cylinders with bad rings?

 

i mean, i tested my lsvtec and got really low numbers... especially since its supposed to have 11.6:1 compression or so..... all 4 cylinders were extremely low, but with +/- 5!!!!!!!

WTF....

is my tester bad? or did it go all the way around once (only goes to 250) and then some?


how could i have burned all the rings so damn evenly?!

 

its possible. i had usdm ir pistons in my ls/vtec with bad rings and all cylinders were low.my rings actually never seated properly.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hybridlsR &raquo;</TD></TR><TR><TD CLASS="quote">its possible. i had usdm ir pistons in my ls/vtec with bad rings and all cylinders were low.my rings actually never seated properly. </TD></TR></TABLE>

what were your numbers?

 

i think in the 220s. i believe they should be in the 250s. not exactly sure

 

Here's a good way to test your rings. Do a first test, write your numbers down. With an oil can, put some oil in the spark plug holes, enough to just coat the rings. If the compression goes up quite a bit, you have blow-by, which means you need new rings.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cyr0ch &raquo;</TD></TR><TR><TD CLASS="quote">Here's a good way to test your rings. Do a first test, write your numbers down. With an oil can, put some oil in the spark plug holes, enough to just coat the rings. If the compression goes up quite a bit, you have blow-by, which means you need new rings.</TD></TR></TABLE>

Yes, very good advice right there.

 

ok, when i did it, it wasnt at wide open throttle... is that a huge factor? i sorta forgot this part...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LSTEG96 &raquo;</TD></TR><TR><TD CLASS="quote">ok, when i did it, it wasnt at wide open throttle... is that a huge factor? i sorta forgot this part... </TD></TR></TABLE>

It should be done at WOT. But incidentally, my numbers didn't change either way I did it. Do it again at WOT.

 

yup, do it again at wot, if it doesnt work, do a leakdown test