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Old 11-15-2013, 10:22 PM
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bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
Join Date: Mar 2008
Posts: 25,236
Mein Auto: 02 BMW 525i M54 auto 130K
Here's a potentially blown engine posted today:
Originally Posted by mpx View Post
After many other hours spent reading this forum, I found the numerous posts about engine diagnosis. I want to thank you for the patience you had to answer my questions, even when similar threads were already available.

I purchased a new battery and checked that I have spark. I have fuel, I can hear the fuel pump running when I short the pins on the relay ( and the relay is good) and I always have gas squirting whenever I release the Schrader valve on the fuel rail after I crank the engine. But the engine wouldn't start even with starting fluid.

I only have compression in cylinder 6. I measured: 1(30),2(20),3&4 almost zero,5(30) and 6(120)psi. I figured the cylinders must have been flooded on several occasions while cranked so I added some transmission oil in each cylinder. That increased compression by at least 20 psi in all except for the middle ones. #6 increased to 200psi.

Given that the engine most likely overheated when the serpentine belt broke, should I start shopping around for a new engine after what I found out? But I should still take the heads off and see what I find, right? The engine should have the iron block, what is the best scenario I can hope for and what special tools would I need?
Please read the suggested threads and add value, either by pictures or by descriptions, so the next person stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need
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