Oil in the Radiator.

[MalibuDavyou5]

Yep, off of a Chevy/GMC truck

Interesting. . . Along with 3 jacks, 1 being the original stand jack, an original spare and now a cooler for a truck that I don't have 🤣. That's okay cause this thing came with mystery paper work too, including a 1979 Malibu booklet and title. . . .Thanks. Yep definitely going to flush out the radiator tomorrow. You people are awesome! 😍

 

[Ribbedroof]

Kinda wondering if the trans cooler in the rad is leaking and they used the external cooler instead.

 

[MalibuDavyou5]

Kinda wondering if the trans cooler in the rad is leaking and they used the external cooler instead.

Either Way I am looking to get a new Radiator anyway, which is what I suspected would be a problem. . .

 

[oldsmobile joe]

trans cooler is mounted in the passenger side of the radiator. when they leak, the coolant will look pink, like a strawberry milkshake.
engine oil will look more like a root beer float. and could come from a leaking intake gasket, but is very rare, more theoretical. if brown, i would go with dirty pan like pagrunt suggested.

or, is it possible that what your seeing is rusty coolant?

 

[MalibuDavyou5]

trans cooler is mounted in the passenger side of the radiator. when they leak, the coolant will look pink, like a strawberry milkshake.
engine oil will look more like a root beer float. and could come from a leaking intake gasket, but is very rare, more theoretical. if brown, i would go with dirty pan like pagrunt suggested.

or, is it possible that what your seeing is rusty coolant?

The best way I can explain it, when I put my finger in it, it was sludgy black oil, that came up as I was filling the Radiator, No real way to see what the coolant looks like until I drain it unfortunately. Other wise oil in pan was fine, and Trans fluid looked good too.

 

[MrSony]

Worse case, cracked cylinder. Sounds like a blown head/intake gasket to me.

 

[fleming442]

Oooooooor, someone could have drained the coolant into a drain pan with oil in it, then dumped it back in the radiator....

 

[pontiacgp]

Worse case, cracked cylinder. Sounds like a blown head/intake gasket to me.

you have a mixture of coolant with the oil but he said the crankcase showed no coolant

 

[blk7gxn]

Pressure test it

 

[MrSony]

you have a mixture of coolant with the oil but he said the crankcase showed no coolant

where else would the oil come from? unless the other going theory is correct, p/o did a dumb and used dirty coolant .