capuchino coolant, Head Gasket or Blown turbo

[GsxEcutioner]

My coolant is brown, like capuchino, but my oil has no traces of coolant what so ever. compression was checked at 150 across the board......I have ARP headstuds with a MLS headgasket all torqued to spec. I do know the seals in my MHI S16g are done because i do get oil in the intake side of the compressor housing and i have slight in and out shaft play. So the question is, Can a blown turbo mix the oil with the coolant?
-Shane

 

[LiquidX]

The only way for coolant to get into the oil in a turbo is if there is a crack in the CHRA that is allowing the 2 to mix. It's very unlikely and one way to test for that is to just disconnect your turbo coolant lines and run without coolant to it which is completely fine to do.

The only other places for oil to get into the coolant is via a bad head gasket which you need to do a leak down test and better yet, test the coolant for traces of combustion chamber gasses. The other place is a bad water-to-oil cooler. If the oil filter is put on too tightly, you can compress the internal fins, distorting and cracking them allowing the 2 to mix.

I personally believe it's your head gasket and unless you have both the head and block surface to a specified RA# then you shouldn't be using a metal gasket.

 

[phunny]

I have the identical problem as you do and I firmly believe it's my oil cooler, a quick test I'd to remove the water lines from the cooler and just connect then together. Then run the car and see if oil comes out the water lines.

 

[LandoAWD]

I had the same issue for a while and thought it was everything BUT the HG. Several months later, the itty-bitty leak when the head was lifting under boost turned into a missing section of gasket.

 

[phunny]

I had the same issue for a while and thought it was everything BUT the HG. Several months later, the itty-bitty leak when the head was lifting under boost turned into a missing section of gasket.

Yeah I was thinking the same thing with mine, but I can't believe that L19's with cometic would lift at 36psi. And mine started happening after tightening the ofc and it has gotten way worse. I hope to verify for sure this weekend.

 

[LandoAWD]

In your case, I'd tend to agree unless the bolts were improperly torqued.

 

[GsxEcutioner]

yea i dont have an oil cooler.......this is going to be a shitty week. Thing is, I dont overheat, and if i take off the coolant lines on the turbo, what do i do with them?
-Shane

 

[talonDSMerr]

You can loop them from the t-stat housing to the water pipe, and just temporarily cap the ones on the turbo.