Log in

View Full Version : Compression Test Results

Pages : 1 2 [3] 4
sleepydsm
06-08-2005, 11:18 PM
Alright.
Raptor
06-09-2005, 10:26 AM
Run 'er til she blows! It is probably valve seals or rings though.


You meant valve seats right?
Jakey
06-09-2005, 11:38 AM
You meant valve seats right?


...cause bad valve seals do not make their presence known during a compression test, only a leakdown test, right?
Shane@DBPerformance
06-09-2005, 07:39 PM
Valve seals are not in the area that compression happens, so no on leak down test also.
Jakey
06-09-2005, 07:47 PM
Valve seals are not in the area that compression happens, so no on leak down test also.

Gotcha, thanks for the correction. :)
Raptor
06-09-2005, 09:55 PM
A leakdown test would be usefull to tell you which was the problem between the rings or the valves. I can always run the new snakey borescope in and see if you don't just have some really crusty exhaust valves or similar if you wanted.
JET
06-10-2005, 01:50 PM
You meant valve seats right?
Yep, was thinking seats and typed seals. :confused:
Pushit2.0
06-13-2005, 10:43 AM
Another issue is the quality of the compression gauge being used, and have you floored the throttle during your test? I would trust a Snap-On or similar compression gauge, not some $35 checker unit. Also the next step would be a leak down test, also a Snap-On or similar gauge should be used.

~John
sleepydsm
06-14-2005, 04:13 PM
Another issue is the quality of the compression gauge being used, and have you floored the throttle during your test? I would trust a Snap-On or similar compression gauge, not some $35 checker unit. Also the next step would be a leak down test, also a Snap-On or similar gauge should be used.

~John

Thanks for talking to me like I'm a dumbass. I used a Craftsman compression tester. It worked fine; it did what it was designed to do. I did have the throttle at WOT while I turned the engine over during the test. I've been planning on doing a leakdown test ever since I did the compression test. My uncle, who is a mechanic, has a Snap On leak down tester. He, like every other mechanic at my work, has a vast array of Snap-On and MAC tools. I've used many, and I still like "el cheapo" Craftsman. I asked him awhile ago to do a leakdown test for me, but we have not set an exact date to do it. And if necessary, I can just go to QPR.
JET
06-14-2005, 05:25 PM
Don't blame John for that. You should have stated that you did that during the test. How are we supposed to know how much experience you have?? There are a lot of new guys on the board lately, and most don't know a whole lot. You joined around the same time as them, but you happen to have a better background. Most of us don't know that.

Let us know how the leakdown goes.