So I finished my headgaskets, added ppe manifolds and up pipes. and installed a oil supply reroute from the port in the block near the filter. Return pipe is braided 3/4" hose and no restrictions. Turbo was rebuilt and ww2 was installed. When I first start the truck up. The oil pressure is between 70-80 psi according to the instrument cluster. I guess this is too much pressure for the seals on the turbo. It starts leaking from the v clamp holding the down pipe to the turbo. Once the engine warms up and the oil pressure drops to normal (30-40) No leaks? I just replaced the oil with T5 10w-30. So should I install a restriction fitting? I dont want to starve the turbo, but I dont want to keep pushing past the seals. Please help, any suggestions
LLY: Oil leaking from turbo exhaust side
- Thread starter bigaland4gals
- Start date
I definitely wouldn't want to restrict the turbo in any way. But we had a Detroit come into the shop that leaks oil when first started but slowly stops. Turns out the seals of the compressor housing had gone bad and the compressor wheel was presurizing the return oil and blowing out the return gasket, and just spewing oil.
I know Duramax's and 10 liter inline detroits are completely different animals but thats my input.
I know Duramax's and 10 liter inline detroits are completely different animals but thats my input.
I've not messed with installing an oil feed line from the gaily by the oil filter to a stock turbo so I don't know if that would affect it.
You're sure the drain line isn't kinked?
I wouldn't think that the oil gaily is supplying so much oil that it can't drain fast enough but I don't know.
If the oil wasn't stopping from coming out of the turbine side when warmed up I would lean towards a piston seal on the turbine wheel that didn't get installed.
Yellowchevy
You're sure the drain line isn't kinked?
I wouldn't think that the oil gaily is supplying so much oil that it can't drain fast enough but I don't know.
If the oil wasn't stopping from coming out of the turbine side when warmed up I would lean towards a piston seal on the turbine wheel that didn't get installed.
Yellowchevy
Thanks for the input. The turbo was rebuilt and balanced and all seals and bearings replaced by a reputable shop. I have contacted them and they have been very helpful and are willing to replace the seals if needed. I dont think the seals are bad because the leaking stops once the pressure goes down and the engine heats up?
I am positive it not kinked. I had 2 cut the hose 3 times to make sure it fit correct and had a nice smooth bend:thumb:
I don't run the stock turbo, but I use the same supply setup, and I have no leaks. I ran the braided return line for a while, but had nothing but problems with it. It would want to either kink, or touch the pedestal and melt. I limped it along by clamping a 90 inline, but finally just replaced it with hard line.
So first, I would tripple-check your return line is flowing well. If it is, then honestly, it sounds like a bad seal to me. The pressure off the cam bearing isn't going to be much lower than off the gallery.
So first, I would tripple-check your return line is flowing well. If it is, then honestly, it sounds like a bad seal to me. The pressure off the cam bearing isn't going to be much lower than off the gallery.