compression #s. good or bad?

[wishgst]

ive got a 95 clipse gst and the compression numbers came back as 175 across the board. don't know how to check what the normal numbers should be so i was wonderin if i could get a quick answer from someone. thanks!

 

[slow4g6392tsi]

That's good. Specs for 1G is like 178 from the factory and it can be as low as like 130 as long as the cylinder's compression #'s are within like 14 of each other. I don't imagine it being a huge difference for 2g although it will be a little higher probably.

 

[wishgst]

sweet. was there a previous thread that anyone knows of that says like what the specs are for different years? like 2ga is this... and 2gb is that.. ?

 

[CruisinGSX]

http://www.geocities.com/dsmgrrrl/FAQs/compression.htm

All Motors are listed. Took me 2 minutes to google it and post it here for ya.

 

[wishgst]

sweeeeet. it says 178 is good so looks like im runnin some pretty decent numbers. thanks for the site. i was worried about a bad HG. how would i know from a compression test if i had a bad HG? (sorry newby questions)

 

[CruisinGSX]

Actually, the best way to find out the source of a leak would be a leakdown test. This will require a leakdown tester (I got one from Snap-on for $300!) and an air compressor capable capable of 100PSI of pressure. I won't go into specifics on how to do the test, but with the test you can find out if your HG, valves, rings, or anything else internal is a culprit.

* edit *

Here's a link to further explain a leakdown test...

http://www.geocities.com/dsmgrrrl/FAQs/leakdown.htm