Milky oil, intact head gasket

I had issues with my 2RZ. It was making a loud rattling noise and had milky engine oil. I thought I had a blown head gasket and a broken piston/rod, but everything seems to be mint.

The engine was presumably waterlocked

Cylinder compression test (cold start) :
180 psi on number 1 and 4 cylinder (from bottom to top)
120 and 125 on number 2 and 3

I'm suspecting a problem with my timing chain. It doesn't explain the milky oil thought.

Any ideas?

Thanks

 

There was another member on here with milky looking coolant, turned out to be rust inside the radiator that was discoloring it and making it look like it was mixing with oil. Had to flush it a few times to get it all out.

 

I flushed 3 times, in barely 2 minutes of running the oil was corrupted

 

So milky oil huh? I'm only aware of one way the oil can get milky, coolant mixing in. And I think there is only 3 ways coolant can get into the oil. Cracked or damaged block, cracked or damaged head and failed interface between the two, head gasket.

 

So if i'm reading between the line, you think its a cracked block?

The car started having engine issues after I ran over an oversized puddle and flooded it. I dont think there was alot of water in but I figured the head gasket would be the first thing that ripped

Maybe the force of the water cracked it?

 

In the pic the 2 center pistons appear cleaner to me. Is that correct?

 

Nah, I don't know. Was just suggesting that those are the only ways to get milky oil. But I would think the most common failure would be the head gasket. Followed by a cracked head. Then the least common, I'd think, would be the block. Again, this is just my experience with auto repair, etc. Not sure if there is something more specific with Tacomas that would help point you in the right direction. Do you have a picture of the head gasket by chance? A nice clear pic?

 

The top piston has a burnt color, but the other 3 are comparable.

 

Also some nice close pics of the block and the head would help.

 

Any help is really appreciated. I went from a backyard mechanic to engine builder real quick lol

 

The milky oil... sorry my pictures aren't very good

 

Nothing jumps out at me, but from pics it's really hard to see finer details. But, if your oil is corrupted in 10 minutes you say, there has to be something seriously up. With nothing sticking out and not being able see it closely, Id guess something in the head. Tell us a little bit out the history of the truck. Maintenance, repairs, etc.

 

Hell yeah that's milky, lol. Well it's not funny, my bad. Yeah something is most definitely up.
The fire rings on the head gasket between 1 and 2, and 3 and 4 look fine?

 

I imported this truck from Miami last January. It has 110k miles on it. Everything was running perfectly until I hit that profound puddle. The engine was flooded and would not start back.

I dried everything, changed the spark plugs, oil, oil filter, air filter.

The car started and was running ''fine", but it was making a hell of a tickling noise and had corrupted oil.

 

Yeah nevermind on the hg question. Pistons and valves look too consistent to have water getting in there.

 

Engine wise, is it all stock? Just curious, where'd you import it to?

 

C'mon Bill and you other pros out there, what do y'all think?

 

Hairline crack in the block or at least in the water jacket someplace, or in the head if the gasket is fine. maybe warped head ?

 

I live in Quebec. Car is stock. I'm not sure, but there was some signs of a rebuilt engine when I bought it.

Anyways, car has always been A1 since I got it. Not a drip of burning oil.

I rechecked the head gasket and and pistons. Everything seems top shape to me. Again, I learn most of my mechanics in the past 2-3 weeks dissembling the engine. Thanks for your support

 

How could the water incident warp my head? Wouldn't the head gasket be the first to break?

My next step would be checking out the water pump, I will inspect for cracks