Oil in the Radiator.

MalibuDavyou5

MalibuDavyou5

Greasemonkey
Mar 2, 2020
149
43
Wyoming
just now tried putting in some 50/50 Coolant in the radiator only to find an oil sludge has come up after putting in a little 50/50 Coolant, a problem I have never seen before. I have had water in the oil but not other way around. Diagnosis as to the problem?

1981 Chevy Malibu K 3.8L OHV
 
airboatgreg

airboatgreg

Royal Smart Person
Oct 2, 2016
1,955
113
What color is the radiator fluid now? As stated before check you trans fluid color if an automatic. Pull the dip stick and see what the oil looks like. What engine do you have?
 
1320John$$$

1320John$$$

G-Body Guru
Sep 18, 2019
530
93
Pennsylvania
What color is the radiator fluid now? As stated before check you trans fluid color if an automatic. Pull the dip stick and see what the oil looks like. What engine do you have?
He says it’s an 81 Malibu with a 3.8 L
 
MalibuDavyou5

MalibuDavyou5

Greasemonkey
Mar 2, 2020
149
43
Wyoming
Radiator fluid still looks green, just I am getting this oil sludge coming up out it, I just rechecked oil and transmission sticks they are fine. So there is a very good chance I have an oil cooler problem. I don't have my Chiltons book in yet, anyone have an idea where the oil cooler on this car is going to be? looks like I am just as planned going to replace the Radiator after all.
 
MalibuDavyou5

MalibuDavyou5

Greasemonkey
Mar 2, 2020
149
43
Wyoming
Okay going to try flushing the Radiator tomorrow when it's warmer. See if that does it. But while I was looking at Advace Auto's site for Oil and Transmission Fluid Cooling, it sparked my memory of the mystery item found in the trunk. .

20200308_185415[1].jpg 20200308_185411[1].jpg

Pictures above wouldn't happen to be a Trans-Oil cooler would it? Thanks for the help all.
 
Ribbedroof

Ribbedroof

Comic Book Super Hero
Supporting Member
Jan 4, 2009
3,530
113
Wellston, OK
Trans oil cooler is in the radiator tank, 229s didn't use an oil cooler.
 
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