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  #1  
Old 11-02-2010, 07:37 AM
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Blow-By

How much blow by is too much blow by?
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  #2  
Old 11-02-2010, 07:56 AM
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are you losing oil, and when you flip the oil cap over does it blow it off, and chug white steam out? Mine did this before she started smoking really bad, due to low compression and fudged rings.
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Old 11-02-2010, 08:12 AM
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Didn't try any of that. Just pulled the cap off and saw smoke coming out. Not a lot but some. Only has 125,000 miles on it.
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Old 11-02-2010, 08:18 AM
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There's really supposed to be a fair amount..... Diesels have a very high compression ration (compared to a gas motor) so, the higher the pressure the more that gets by the rings into the crankcase, creating what looks like alot of blow-by.

Sounds like you don't have anything to worry about, if the truck runs fine, forget about it.....
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Old 11-02-2010, 09:42 AM
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get a compression test to know for sure. could just be your injector o-rings too.

this a one-owner truck?
how do the turbo fins look?
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  #6  
Old 11-02-2010, 11:42 AM
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Quote:
Originally Posted by NoRalPh View Post
There's really supposed to be a fair amount..... Diesels have a very high compression ration (compared to a gas motor) so, the higher the pressure the more that gets by the rings into the crankcase, creating what looks like alot of blow-by.

Sounds like you don't have anything to worry about, if the truck runs fine, forget about it.....
you will know if you have too much because I was using lots of oil to to it blowing up into the turbo. also if it chugs out of the oil cap with lots of pressure. Mine seemed to run fine with these symtoms for almost the full first year I had it. I ran a compression test and found out number 4 was very low. I would suggest the compression test and go from there. More than likely you are fine since you only have 125k or so.
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Old 11-02-2010, 02:10 PM
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As already said diesels naturally have blowby. Is there any blowby coming out of your exhaust or ccv? If not, dont sweat it.
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Old 04-17-2012, 04:49 AM
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Not the first owner I took out air cleaner hose and saw the turbo fins some of the fins edges were chipped off found a piece of glass seating on the bottom of the valve springs trouble light bulb I guess when I changed out the glow plugs on the driver side Finely got all the valve cover bolts off the pass side but cant get the cover off any tips?

this a one-owner truck?
how do the turbo fins look?[/QUOTE]
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