Old Feb 29, 2008 | 05:07 PM
  #172  
Provocateur's Avatar
Provocateur
On permanent hiatus
 
Joined: Jul 2004
Posts: 9,716
Likes: 0
From: A forum with actual tech
Default

Originally Posted by FooD2000
Still hacking away at it huh?

I'm rooting for you, can't wait to see some videos!
Thanks for the support. I'll get those videos when I can.

Unfortunately, I have been noticing some sporadic oil burning lately and did a compression test. The results of the compression test were very disappointing:

1: 180
2: 120
3: 180
4: 180

The 60 psi variance clears shows something is very wrong. I rechecked to make sure then performed a wet test...same result. The spark plugs all looked great (better than they ever did with gasoline) even cylinder 2, so I can't explain it.

I spent a couple hours this afternoon thinking things over and I decided to start tearing her down. The head came off without a hitch. The valves all look great (ironically, cylinder 2 bent a valve a while back for some unknown reason), the cylinder walls look great, and the tops of the cylinders look so much cleaner than they did last time the head was off (thanks E85), so I still have no idea why the compression is low. Tomorrow, I am going to remove the #2 piston and confirm my guess of busted ring lands. If it occurred in just one cylinder, sounds like piston failure. If every piston has its ring lands busted, the tune is the problem.

While I'm at it, I am going to be putting in an OEM oil cooler and installing some ports on the back of the block and eliminating the black box for additional PCV flow.
Reply