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+--- Thread: Causes of excess blowby (/showthread.php?tid=8480)
Causes of excess blowby - Badger - 10-05-2022
cm870-
ive had this truck since 850k miles, now has 1.4mil .
Has had 2 set of pistons/liners put in since i bought it, and it has always had quite a bit of blowby. can a wore out air compressor create blowby ? i dont even pay attention to it anymore but after holding the steering wheel all day today i just started thinking about it...
and i made one of them test tube things like in the manual for checking blowby pressure, and mine was always worse than they say is "acceptable"
RE: Causes of excess blowby - hhow55 - 10-05-2022
In quickserve you will find in sympton search under High Blowby info that should be of help.
RE: Causes of excess blowby - Signature620 - 10-06-2022
Air compressor, turbo, valve stem seals or cylinder issues are all possible causes.
RE: Causes of excess blowby - Rawze - 10-06-2022
(10-05-2022 )Badger Wrote: cm870-
ive had this truck since 850k miles, now has 1.4mil .
Has had 2 set of pistons/liners put in since i bought it
...
What I would like to know is why it has had 2 sets of pistons and liners in only 550k miles?. Something does not sound right at all if that is the case.. and was all OEM parts used?// was a new head used?... were the liners raised to 0.015"?... and did anyone double-ensure that the rings were all set correctly (180-degrees away from each other properly) as the pistons went in?..
those are the things that come to mind when I read your post.
RE: Causes of excess blowby - Bengy88 - 10-06-2022
What the guys above said.... and does this truck happen to have a hot file in it?