cushmaneaglerider
Well-Known Member
I have a 5.3 getting oil in the radiator but no water in the oil. Any ideas?
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Help Support Hardline Crawlers :
2004 GM 5.3 getting oil in radiator?
- Thread starter cushmaneaglerider
- Start date
pholmann
Well-Known Member
Are you running an oil cooler?
cushmaneaglerider
Well-Known Member
No oil cooler. Yes, I realize the pressure difference. I just have never seen this before with no water in the oil. Cracked block? I can not think of anything else.
gottagofast
Well-Known Member
- Joined
- Dec 11, 2015
- Messages
- 1,064
Cracked block, or head gasket.....
Yank heads n go from there.
Yank heads n go from there.
whiskeymakin
Well-Known Member
04 and some of 05 had the gay Mexican head castings= cracks around one of the center bolts=coolant loss and eventually if it's bad enough you will see it in the oil.
This may not be your exact issue but if you Google 5.3 coolant loss it will end you up at the Mexican cast heads if I remember correctly
This may not be your exact issue but if you Google 5.3 coolant loss it will end you up at the Mexican cast heads if I remember correctly
grcthird
Birmingham, AL
RustyC said:
With the exception being: a warm engine that is turned off has no oil pressure and still has coolant pressure, maybe just not enough coolant pressure to force it's way back through the cracked journal into the crank case. Sounds stupid but I have seen it, not on a 5.3 though.
whiskeymakin said:
https://www.youtube.com/watch?v=9gKstTBLckM
Pretty sure this is what you are talking about. And the leak won't show up sometimes unless it is torqued down, so the standard machine shop leak test using just block off plates in a dunk tank may not catch it.
If it's only happening on the side with the PCV then it may be sucking the coolant vapor in the intake.
