Compression test on a 6.0L specs??? - Ford Powerstroke Diesel Forum
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  #1  
Old 09-25-2009, 03:32 PM
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Compression test on a 6.0L specs???

I want to find out myself if my engine is dusted or not...So sick and tired of hereing all the "it could be this it could be that" B.S.... I need to know what I should see for psi in each cylinder. Any help would be appreciated!
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Old 09-25-2009, 10:09 PM
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Someone told me I should see 400 psi minimum...sound right?
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Old 08-09-2010, 12:41 PM
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Hey thanks for the quick replies! lol
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Old 08-09-2010, 12:50 PM
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350-400 To start and run, yes.
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Old 08-09-2010, 07:10 PM
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Ok I did a compression test and one cylinder was alot low than the others ( I just did the drivers side for now) The front cylinder,# 2 I bielieve,was low,like inthe 110psi range.
I pulled the glowplugs and injectors on the bank and the tips all look good.Think the injector was over fueling and washed out a cylinder?? If so Could I get a away with just honing and reringing?? The engine has about 190,000km on it which should be nothing for a diesel...
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Old 08-10-2010, 05:17 PM
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You could have valve issues...
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Old 08-10-2010, 07:12 PM
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I put two brand new batteries and just did another compression test. This time I used a gauge that reads to 600 P.S.I.

On the first hole on the drivers side closest to the front I got 210 P.S.I. I squirted some oil in there and then it went up to 230 psi.
Two other cylinders had 370 P.S.I and the last one had 340 P.S.I.
Think I have a cracked piston or just some bent/burned valves?

It overheated right at the end too but I think it ran hot only because it was running on about three cylinders...would barely pull itself around.
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Old 08-10-2010, 10:56 PM
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I had exactly the same thing happen at 183000km on my 03, no compression on cyl 2, performed a cyl leakage test, found air escaping into the base. Pulled the engine and disassembled, found injector O ring failed dumping fuel into the cylinder resulting in a melted piston and siezed rings. Cyl walls were perfect suprisingly. I made an air fitting out of an old glow plug to pump the air into the cylinder.
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Old 08-11-2010, 03:14 PM
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I didn't even bother with the cylinder leak down procedure. This engine has approx 190,000km on it so it's getting a serious over haul...
I'm three hrs into the engine removal and all I have left is the ac lines,the bell housing bolts,tourque converter bolts and that's about it. Thought it would be alot harder to pull,guess not.
I just have to look on line here and see what the trick is to remove the turbo. I have the oil pressure line off as well as the two bolts on the bottom of the turbo pedistal.Down pipe clamp and the clamp going to the manifolds are off,there must be something else holding it on.
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Old 08-11-2010, 03:59 PM
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Quote:
Originally Posted by DieselJuice View Post
Down pipe clamp and the clamp going to the manifolds are off,there must be something else holding it on.
As a matter of fact, there is. If it's a 2003 model year, there is one more 10mm bolt on the back side of the housing that needs to be accessed on the rearward side of the downpipe near the firewall. Judging by your post, I'm assuming you're pulling the engine the HARD way (cab-on).
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