Coolant in engine oil

[lej1969]

Problem: '68 Coronet 440 with coolant in the engine oil.

I've been searching several posts and the web..still haven't found the answer..other than the possibility of a cracked block or cylinder head. I'm hoping that I'm missing a more simple problem. Here's the history:

Car runs great. No steam from the exhaust. When checking oil level I noticed milky foam on the stick...became worried.

Spark plugs look great. I dropped the oil pan...clearly coolant in the mix. Also, a ton of coolant flowed out of the pickup when the pan was dropped. Also, I visually inspected the interior of the block when I dropped the pan. It looked good.

One note: I did not notice this prior to changing the intake and carb. I also installed a high-volume water pump. I'm not sure what could of happened to cause a coolant leak from this, but any clues would be good. Could this be something simple, or does it seem like I'm looking at a blown head gasket (min) or cracked block/heads? Are there any other areas I should look..places that coolant can enter and then mix with the oil? Thanks!

 

[bigmanjbmopar]

blown head gasket

 

[tpodwdog]

X2

 

[IQ52]

68 Coronet 440?

Intake manifold change?

440 body style with a small block engine right?

There is a coolant passage through the intake manifold and if the intake isn't sealed correctly it will leak coolant into the valley of the engine and down to the pan.

 

[lej1969]

IQ52 -
This is a 440 engine.
I changed out the Victor Jr. for an eddy's performer rpm.

 

[lej1969]

All-
Thanks. I think I see where i need to go with this issue...I'll check the intake and see if there's a leak at the coolant passage. If that's not it, I'll start tearing it apart to change the head gaskets.

In terms of the intake gaskets, I used felpro. However, I've seen many posts that say you don't need to use intake gaskets at all...that the valley pan does the job. Since this head/intake combination has changed..do you reccomend I purchase a new valley pan and just use that...or should I use new gaskets with the old valley pan?
Thoughts?

 

[moparmarks]

Big block intakes do not have water passages, small blocks do.
I'd use a new valley pan without any other gaskets. I use alittle copper seal on it. But a bad valley pan will cause a vaccum leak and/or suck oil into the camber. No water issues with the intake. Same with the water pump. A bad gasket on it or it's housing should not dump water into the oil. Talkin BB here, not SB.
Bad head gasket like stated before will mix oil and water. I'd run some leakdown test.

 

['67Satellite]

If and when you do change the head gaskets, make sure you get all the water out of the bolt holes in the block. I fought with that for a while, assembling and disassembling because everytime i'd torque the head bolts water would seep under the gasket and it would lose its seal.

Rookie mistake i guess, it was my first engine.

 

[lej1969]

O.k. Got it...BB intake does not have water passages. Problem is a blown head gasket. Thanks everyone for all the tips. LEJ

 

[Photon440]

Pull the plugs, chances are you'll find the cylinder that's leaking if one plug is extra clean from the steam cleaning. That's the head I'd pull first.

-=Photon440=-

 

[Pops1967GTX]

Here a simple test.....

http://www.moparstyle.com/forums/161217-post4.html