Engine/Transmission (1998.5 - 2002) Twins break in timeframe? Oil in intake...

[SConklin]

I posted this in another thread, but I figured I'd give it its own thread to make the new subject correct.



Pulled off the intake, and now there's a ton of oil, everywhere in the intake. I guess that would explain the hard starting...

Since the twins I installed are brand new, and have are still in the break in stage (they have about 75 miles on them now,) is this normal?

How long till the seals in the turbos seat? Or do I just have bad seals from the start?



Skyler

 

[Gary - K7GLD]

I seriously doubt you hafta "break in" turbo seals - you have something wrong right from the start...

 

[RonA]

Any chance one of your return lines is blocked or kinked and not draining properly.

 

[Todd T]

Any chance one of your return lines is blocked or kinked and not draining properly.

thats exactly what i was thinking Ron. I hope you didnt run them both into the same drain hole either. that would cause the seals to blow oil too.



something is not right if you've got noticable amounts of oil in the intake tract.

 

[SConklin]

The drains are both open, and draining separately (PDR kit). The top turbo drain has a slight upward slope before dropping back down to the bottom of the block though. Could a small slope for the drain cause it to build up enough? Seems unlikely to me... Other than that, everything drains well...

 

[csutton7]

really there's no break in for turbos-except for pre oiling them before you start the engine-although I do like to take it easy for the first few minutes after they're installed to insure oiling is working---



where exactly is the oil---air filter , between the turbos, between turbos and intercooler or after intercooler---do you have an exhasut leak as this will look like oil when sucked into the air filter and thru the system????-----chris

 

[Gary - K7GLD]

Another remote possibility, especially if you have been running pretty high boost with the new setup, and the engine has quite a few miles on it, or wear problems, lotsa blowby and a restricted crankcase vent might cause problems like you have...

 

[Forrest Nearing]

turbo "seals" are piston ring seals... there's no break-in time on turbos... it's more of a rain dance to make sure everything's clickin' before you start wailing on them.



I would be looking at oil drains for kinks/etc. check the cold sides of the turbo to see if it's in both turbos or just in the top...



Forrest

 

[SConklin]

Just for info, the motor has about 50k on it, with a brand new case of AMSOIL 3k, and a brand new head gasket, studs, and o-rings. I've run the truck about 100 miles since, and haven't pushed it past 20psi of boost yet.

 

[csutton7]

where exactly is the oil???

 

[Beast2B]

could the upward slope of the return line be 'draining' through the turbo at rest? After the engine is shut off and no pressure is on the system, could the oil seep past the seals... ?

 

[csutton7]

B2B--doubt it--there'd be no pressure--unless a seal was bad--this would also mean that the oil return line would have to be above the seal line for it drain back there and I sure hope this isn't the case---I still want to know where the oil is exactly---chris

 

[Forrest Nearing]

upward slope!??!?



there's your problem right there... oil drains need to be as large and as close to vertical as possible!!!! the oil coming out of the center section is a frothy/foamy mess... if you're asking it to go uphill, there's your problem right there. fix that drain, and you'll be good to go!



Forrest

 

[justinp20012500]

Like everyone said here. Check the drain hose.



I had a very slight kink in the silicone hose that drains the biggun on the bottom. It caused the oil to seep past the seal and work its way into the sompressor housing.



What filter are you running? Is it possible that you over oiled the filter?? (if its a cloth media type)





Justin

 

[SConklin]

If it is in fact the drain, and the oil has already been blowing by the seal, is it like the carbon seals on the front/rear mains, and once there's oil past it, it's done for? Or will it clean itself up, and be good to go?



Also, when I mentioned upward slope, I didn't mean like it was going straight up... I meant like a very slight incline for an inch or two, before it drops straight back down to the drain in the block. - like a vertical drop out of the turbo, a kind of 90 degree horizontal curve over to the block (where the slight incline is,) then another vertical drop to the hole in the block.



Does that sound like the problem?

 

[SConklin]

As for the filter, it is an aFe, pre-oiled from the factory, and very clean. The oil in the intake is definately engine oil. I had posted elsewhere about just yesterday noticing fuel in the oil too, and related issues which I am also working out. Would that have any affect on the situation?

 

[csutton7]

I don't think it would be the drain--unless it's kinked or plugged--another one of those dumb questions I have to ask--sometimes the turbos come with a plug at the drain back--you did remove it??... . chris

 

[SConklin]

The plugs in the drain holes? I removed them, unless there was one hiding deep inside the holes that I didn't see... but that seems highly unlikely...

 

[csutton7]

usually it's a rubber or plastic plug that's stuck into the oil inlet and outlet(drain back)--but if you know you removed them then maybe it's a bad seal---I think I'd work on the fuel prob first and then see what happens to your other issues--god knows you must be pulling your hair out--chris

 

[Forrest Nearing]

having a horizontal section is bad enough... if you have an uphill section in your drain, I GUARANTEE you that's the problem!!!!!!



the oil seals are just piston ring seals... straight metal to metal...



once you resolve the drain issues and clean the excess oil out of the piping/etc. it will be as if nothing was ever wrong.



Forrest