little problem here...
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2nd Gear
Joined: Sep 2008
Posts: 6
Likes: 0
just tested the compression
Hi,
I just did the test. 169 in the rear and 167 in the front. Looks like all this was for naught.
I looked at my bill from the repair centre and it says right on it that I needed new head gaskets!
I was right there when he sprayed a fluid on the fins at the head gasket area and the motor sputtered......
Must have been snake oil I guess
I just did the test. 169 in the rear and 167 in the front. Looks like all this was for naught.
I looked at my bill from the repair centre and it says right on it that I needed new head gaskets!
I was right there when he sprayed a fluid on the fins at the head gasket area and the motor sputtered......
Must have been snake oil I guess
Cruiser
Joined: Sep 2006
Posts: 191
Likes: 0
From: Clanton, Alabama
Compression test or leak down will tell you. You can usually hear it make a spitting noise. Usually Evos were bad about the base gasket leaking oil and it could be fixed by using a part called the oil fix.
Road Master
Joined: Nov 2007
Posts: 1,223
Likes: 3
From: Peoria, AZ
Was compression test done at operating temperature? Op temp may be significantly lower. I always do a leakdown test after; you can pass a compression test but still have a leaky valve. Head gasket is fine at that PSI. The compression test opens and closes the valve (cranking) while the leakdown is at TDCC only.
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2nd Gear
Joined: Sep 2008
Posts: 6
Likes: 0
Thanks,
Yes, I warmed the bike up to normal operating temp before doing the compression test. I was surprised that the compression was so high, given that anything over 90 lbs is satisfactory.
How does one perform a "leak down test"?
thanks
again
andy
Yes, I warmed the bike up to normal operating temp before doing the compression test. I was surprised that the compression was so high, given that anything over 90 lbs is satisfactory.
How does one perform a "leak down test"?
thanks
again
andy
Road Warrior
Joined: Apr 2007
Posts: 1,952
Likes: 15
From: Senoia, Ga., by way of Miami, Fl..
You wont be able to measure it, but you may be able to use your compression tester, if it has a quick connect for your air hose. Just listen and feel for a leak. It will give you an idea anyhow. Be aware though, that the air will push the cyl to BTC. If its in gear, the bike will move.
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