Oil in Intercooler pipe

[Mike80911]

Forgive me if this is a stupid question but I am new to turbos so I am not really sure if this is supposed to be. I removed the intercooler yesterday to do some engine work and the pipe that runs from the intercooler to the lower left corner of the engine bay (not sure if that is the up-charge pipe) had oil inside of it. Not flooded just a coating. Is it supposed to be there or does this indicate some sort of problem? Also there is a sealing ring there part #G93011023000 that goes on the bottom of this pipe it is split in half and I am having trouble locating a new one our host seems not to have it in stock. Will this being split cause any performance problems? Thanks as always for any help

[PorscheGAL]

A coating or light film of oil is normal and you do need to replace that O-ring seal. If our host doesn't have it, then I would contact Brian at RarlyL8 Motorsports.

[Roby466]

A little bit of oil coating should be ok... some of it probably passes through the compressor seals. Does your car smoke on startup?
You definitely want to replace that o'ring. A blown o'ring will cause lean mixture at low RPM and cruising (vacuum will suck in unmetered air) and most likely a pig rich mixture on boost as metered air escapes through there (boost leak). Check other online parts stores if PP does not have the o'ring.
Good luck!
David

[Mike80911]

Thanks for the replies good to know that is normal. My car does not smoke on start up. I felt there might be a vacum leak somewhere so I will replace that seal as soon as I can find one. Is this system the same as NA motors that being when you take off the oil cap should the idle change? If it does not that indicates a vacum leak correct?

[mark houghton]

Originally Posted by Mike80911

Also there is a sealing ring there part #G93011023000 that goes on the bottom of this pipe it is split in half and I am having trouble locating a new one our host seems not to have it in stock. Will this being split cause any performance problems? Thanks as always for any help

Mike, don't bother to buy the sealing ring whose part number you've listed, as it's just window dressing and has no vaue sealing anything. There are only two o'rings that seal the up-pipe....one that seals the turbo end, and one that seals the IC end of the up-pipe. Not sure which one you're referring to, but here are a couple of links to what you may need:

Pelican Parts - Product Information: 999-701-473-40-M213

Pelican Parts - Product Information: 999-701-469-40-M260

Oh...and there is no such thing as a stupid question, not on this forum anyway. Oil in the up-pipe...yepper, got that. Old turbo seals most likely, doesn't mean the turbo is about to self-destruct, just showing it's age. I would suspect, but can't confirm, that even a new turbo will blow just a scant amount of oil past the seals. Could also be blowby, but you would see the same oil coating the air intake if that were the case. If everything is dry pre-turbo, then suspect the seals.

[PrimeMvr]

Originally Posted by mark houghton

Could also be blowby, but you would see the same oil coating the air intake if that were the case. If everything is dry pre-turbo, then suspect the seals.

Mark, can you elaborate on that? My airbox has quite a bit of oil in it all the time and I don't know why. Sometimes it even drips from the corner of the K&N after shut down. I keep my oil level betwen the middle to low mark.

Not trying to hijack the thread, as Mike may find he has oil further up the stream too.

Thanks,
Steve

[krasuskyp]

FWIW I just took off my 50k 3LDZ to find zero shaft play whastsoever - but I do have a light film of oil in the I/C tract...

[mark houghton]

I'm far from an expert on this oil film topic, but I would think that oil in the air cleaner box would be indicative of piston rings showing their wear and blowing by a small amount of oil which - through positive crankcase ventilation hoses to the air cleaner box - would show up as an oil film. In this regard, these 930 engines are no different than a NA engine made in Detroit.
I had my box off the other day and luckily for me it's still bascially dry inside. My oil is definitely coming from the turbo seal, but not enough to cause smoking or other weird stuff. I hose out the inside of the IC once a year to remove any oil residue and assure good heat transfer.

[HFR_Racer]

Mike:

It seems that some are not taking the time to read your original post. I see that Mark did read your post and did make an excellent reply.. Great job Mark.

The part number that you posted #93011023000 is the lip type sealing ring for the inter-cooler and NOT the O-ring. Many of us run without this secondary sealing ring with no issues. You will find many IC photos on this thread without this seal. Actually.. I can't remember the last time I saw a photo with one.

[krasuskyp]

HRF... hmmm...

I did take the time to read Mike's original post, and in reading the other replies it seems everyone did as well. Just that the replies were more focused on the oil residue than the question of the outer sealing ring.

lighten up, Francis 8-/

Don't want your memory banks to go unrefreshed and/or draw another oddly accusational reply, so here's a pic of my up-pipe with sealing ring attached for your viewing pleasure / enjoyment:



I use them b/c I have them...

[Mike80911]

Thanks for the help everyone so what I have learned is that the oil is normal there is no oil anywhere else so that is a good sign. The engine was rebuilt about 10k mikes ago. I also gather that the seal that I am refering to will not cause any performance issues but I am going to replace all of the o rings and if I can find the seal I will replace that also.

[jwasbury]

Originally Posted by PrimeMvr

Mark, can you elaborate on that? My airbox has quite a bit of oil in it all the time and I don't know why. Sometimes it even drips from the corner of the K&N after shut down. I keep my oil level betwen the middle to low mark.

Not trying to hijack the thread, as Mike may find he has oil further up the stream too.

Thanks,
Steve

Oil in airbox is probably blow by. Pull of the oil filler cap with the engine running, if you have rhythmic, exhaust-like puffing from out of the oil tank, you've probably got busted rings, a melted piston or both.

[PrimeMvr]

Jacob, thanks for the tip. Thankfully nothing like that happening. 7k since a full rebuild and engine is strong, but you and Mark have me heading out to get a compression tester! I think it's coming from the canister looking thingy (very technical term) tucked up in the top front of the passenger rear wheel well. What the heck is that?

It might also be the large hose that goes to the top of the oil separator and the neck of the oil tank. Both of those hoses drip some oil whenever I take the air box off.

There is very little air movement from the tank when I remove the cap to check the oil. Mysteries.

[mark houghton]

Originally Posted by PrimeMvr

Jacob, thanks for the tip. Thankfully nothing like that happening. 7k since a full rebuild and engine is strong, but you and Mark have me heading out to get a compression tester! I think it's coming from the canister looking thingy (very technical term) tucked up in the top front of the passenger rear wheel well. What the heck is that?

It might also be the large hose that goes to the top of the oil separator and the neck of the oil tank. Both of those hoses drip some oil whenever I take the air box off.

There is very little air movement from the tank when I remove the cap to check the oil. Mysteries.

You don't perhaps have too much oil in the system...reading past the top mark on the dip stick?

[jwasbury]

Originally Posted by PrimeMvr

There is very little air movement from the tank when I remove the cap to check the oil.

That's a good sign!

[mooney265]

Originally Posted by PrimeMvr

I think it's coming from the canister looking thingy (very technical term) tucked up in the top front of the passenger rear wheel well. What the heck is that?

Charcoal Filter Canister - For the fuel tank...

[PrimeMvr]

Originally Posted by mooney265

Charcoal Filter Canister - For the fuel tank...

Ah, that makes sense. I wondered cuz the goop that comes out of it is black, but my oil is pristine. I double-checked this morning after getting back from an a/c recharge, and the oil level is just below half.

I live in a very hilly area with many bumpy roads, so maybe the oil is just sloshing around a lot. I'm not going to worry about it much unless the dripping comes back. I'll do a compression test over the winter. Gorgeous out, just waxed, headed for the road! Have a great one!!!