Oil in my antifreeze but the oil in the engine is not milky

[1qukegt95]

like the title states, there is oil in my antifreeze but the engine oil looks perfectly fine.

A little background.... the last few weeks I have been putting tons of oil in the car (like a quart every 300 miles), but it is not smoking very bad and it runs excellent! I was thinking I should consider a rebuild pretty soon because of the oil consumption, but I think I have other problems. I am not sure how the oil is getting in there, here is my assumptions...

I don’t think the head gasket is bad since the oil looks fine.
I put a VF12/VJ20 hybrid turbo on it last year and rebuilt the center section myself and ran the oil and coolant through it, do you think that the oil is getting pushed into the coolant in the turbo center section??
another thing I was considering was the head studs, they are stock. maybe the stock studs are not strong enough for this turbo at full boost and the head is lifting up and forcing the oil into the coolant jackets??

what do you guys think? I'm going to go and drain the coolant and take out the rad now, if I find something I'll keep you updated.... but other than that, any thoughts about my situation would be greatly appreciated.
Thanks,
Chris

[bcowie]

When the engine wasn't turbo did it have this problem?

I think #1 is more likely then #2.

Did you ever remove the head bolts?

[1qukegt95]

its a GTX engine, so its always been turboed (i worded that wrong in the first post, i upgraded the VJ20 with a VF12 cold side and made it a hybrid)... and yes, when i first got the engine i replaced the head gasket and head studs (with stock ones), along with the water pump, etc.

After draining the antifreeze and sludgy oil with it, i think i am going to replace the head gasket, get some ARP head studs and loop the coolant back into the engine and not run it thru the turbo.

Are there any recommendations for a good head gasket, or will a stock one suffice with the ARP head studs? mind you, i will be running 16-18 psi of boost...

[bcowie]

When did this start? After the head gasket?

[yunvmyegt]

dumb question but did you get the head machined or just slap a new gasket on?

[bogaut]

might as well do a compression test just to rule out blown hg

[atomicEGT]

sounds like a BHG.

water-cooled turbos suck.

I have a Felpro gasket and ARP studs and I've run 2.5bar with a HY35.

[jay]

It's probably coming through the centersection. Oil in coolant and not the other way round implies a leak under more pressure than there is in the cooling system, though I'd expect that area to be as much of a two way street as the head gasket. You need to do a compresssion/leakdown test and find out where it's bleeding from. Cuz another possible place for this problem could be the waterpump. Unlikely but possible.

[1qukegt95]

The oil consumption started a few weeks ago, I didn't notice the oil in the coolant until yesterday.

I put the head gasket on 3 years ago when I got the engine, and just put it on without getting it machined.

I'm going to do a compression test on it today.

[Mazda_Powered]

machine work and engines are your best friend btw lol, at least put a straight edge on it next time.

I think you have an idea of where to go now though, but one last thing to leave you with is the oil cooler at the back of the engine, the oil filter sits on top of the oil cooler. They've been known to mix oil and coolant together in the event the o-ring fails.

[1qukegt95]

well i just did a compression test and it was 120-125-126-115

i think i need to replace the rings, while I'm in there I'll put on a new head gasket and APR studs, along with looping the coolant back into the engine for the turbo.
do you think i should put bolts in the center section of the turbo where the coolant bolts are the block the oil or would i need to rebulid the turbo too?

[1qukegt95]

I have another problem I ran into..

I replaced my head gasket last weekend and started the car up to flush the oil out of the cooling system. I ran it, then drained the coolant (I was just using water for this), I repeated this several times over about an hour, then the car suddenly just died. I had no spark coming from the coil to the distributer. I tested the plug the goes to the coil and it was at 9.7 volts (the book says it should be around 10 volts). so I thought it was the coil, replaced it and no spark. then I thought it could be the igniter, replaced it also and I still have no spark coming from the coil..... I don't know where else to look, all of the plugs around the engine are plugged in, I also reset the ecu and still nothing.



does anyone have any suggestions??????

[jay]

igniter and battery. and fuse block.

[1qukegt95]

I put a new igniter on it and the battery is good. I don't have any blown fuses. What do you mean about the fuse block?

[yunvmyegt]

check for signal from ecu to the ignitor, ignitor to coil and check for pulses from the disty to the ecu just cause its got power on one side of the coil doesnt mean it has the ground trigger from the ignitior