7 replies to this topic

[diats]

So I've been trying to bring my 855 R back from the grave, motor let go last year at 267k. After some time sourcing a suitable 85k lump. I began gathering all the seals, traps, gaskets and such. Added new cam seals, rms, tb, pcv system, oil pan gasket & O rings, all turbo seals and O rings, oil cooler lines along with a few other things.
Engine went in 2 weeks ago, it fired right up first crank.
Now my issue. It'll hold oil at idle, but under any kind of load, it blows oil from random areas out of the lower half of the motor, heavily coating the underside of the car, and my rear hatch. I suspected a mistake in the pcv, went back over it on tues, all was clear and clamped. After a mild test drive, back window was coated with oil again.
Back under the car, looked to be the oil pan, re did that on weds, and double checked the turbo drain and dipstick seals. After another drive, same conditions exist.
Spent the weekend rechecking everything, making sure i didn't leave a towel someplace it shouldn't be, went over the vac lines again, pcv was gone over again.

Is there anything I'm forgetting? I've been searching, i found some similar threads, but nothing all that close to my issue.
I'm at my wits end with this, any help is appreciated.
Thanks to all in advance>
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[Bah]

If no one knows the exact issue, i would try cleaning the entire engine up underneath, put cardboard down, turn the car on goose it till it starts leaking just a little bit, turn the car off, and see where it's dripping from.

Thoughts that come to mind; What sealer are you using for the Oil Pan? Volvo pink? Your PCV was brand new, not old and clogged right?
You say the lower part of the car, so i lean towards the RMS, but you replaced it...never done mine, but, if that didn't go in just right, it's possible.....
I would lean towards an oil cooler line as well, but, it should be fairly noticeable.

[diats]

I've used the Volvo pink stuff twice now, Pcv is new, and my flywheel and where the trans and block meet was bone dry, confirmed when I did the pan again. Unfortunately I painted the entire engine a bright silver, and the clean oil is really hard to track. Going to try the tracer dye hopefully later this week. Also going to borrow a compression guage this week as well, get some numbers.
I've been playing with these cars for a little while now, and I have never run into anything like this. I'm beginning to wonder if the block is cracked.

[Fudge_Brownie]

I had one of these problems and it drove me nuts. I eventually learned, from watching my boost gauge, that it only sprayed when under positive pressure. Ok, so I had a good idea it was the turbo in some way. Still couldn't pin it down. So I laid under the car while my brother revved it, and saw it spurt oil from the turbo drain pipe's o-ring where it meets the block.

Now I know you said you checked that, but I'd figure the same procedure. Have someone rev it while you look under and from above. Lay cardboard down, and you can also hold pieces of cardboard behind the engine to try and better pin point it.

There's only a handful of places I can think of that oil is under pressure. The turbo, it's two hard lines, and the oil pan seal would be my primary guesses. And I'm going to venture a guess that it's your oil feed pipe to the turbo: it is either hairline cracked from stress/bending, or the copper crush washers don't have a good seal.

[diats]

Thanks! Something I never thought of, I did cross the drain pipe over from the old motor. It looked fine, but it is kinda old.
Please keep the ideas coming, Thanks to everybody.

[diats]

This, along with a cracked turbo drain pipe caused this whole dilemma.

For now it's dry as a bone.

Too hot today to crawl back underneath it, look at it tmmrrw. Hoping for the best.

[diats]

Went back over everything today, all looks good. A little more brake cleaner and power washing underneath to get some more of the residual oil.
Finally, no more smoke, no more spray on the back glass, and no more spots on the ground
Cant believe a tiny crack, and a botched seal beat me up this badly.
Thanks to all.

[James A Sousa]

Whoo Hah !!!

Good work - looks just like mine