G-turbo issues??

[ubguessin]

Hello all, so recently got my 1HD-T rebuilt had it back since just before Christmas 2025.
Anyways got under the truck today because I need to re-place my hub bearings and was doing some teardown. (Prolly knuckle rebuild as well).

I was examining my G-turbo and noticed an oil "leak." Pics are included. Turbo has maybe less than 30k miles
My question is, is this related to turbo problems, Seals or catch can issues? The oil appears to be coming from the intake boot as well as the oil drain tube...

 

[OGBeno]

You have a leak at the gasket. Replace gasket and hose. Reinstall.

 

[ubguessin]

You may be right, the only other concern is that on the last pic you can see on the intake pipe has oil seeping past as well. Even with a catch can.

What adds me to thinking I am having turbo seal problems is that the exhaust has a haze to it as well.

 

[TheBussman]

catch cans done wrong can make some big leaks too. needs a through clean and recheck, how good of condition is the inlet hose to the turbo?

 

[SNLC]

You must drive in salt and salty conditions?

Everything looks way older-more used than 30k miles and a fresh rebuild to me.

Cheers

 

[cruisermatt]

You must drive in salt and salty conditions?

Everything looks way older-more used than 30k miles and a fresh rebuild to me.

Cheers

Yeah dude, looks more like 30 years, then 30k miles

 

[Eurasiaoverland]

Have you checked for blow-by? Take the PCV hose off the valve cover and rev the engine up to see if you're getting pressurisation.

Take the intake hose off the compressor housing and check for axial play in the impeller.

 

[AussieHJCruza]

Catch cans often cause more problems than they solve. If you don't have EGR, get rid of it IMHO.

 

[Dougal]

Is the crankcase pressurising? That will make a turbo bleed oil from everywhere.

 

[brownbear]

I just had my turbo rebuilt, too. I was speaking with the tech about oil pressure restrictors for the oil pressure line. He said if I notice leaks or oil in the intake, I should use one. He said sometimes they need this as the oil pressure is too high for them. From the Google AI... turbo oil pressure regulator is an inline device that controls engine oil pressure, specifically directed to your turbocharger. By maintaining a steady pressure (typically around 40 PSI), it prevents over-pressurization that can force oil past bearing seals, leading to exhaust smoke, oil consumption, and premature turbo

 

[Dougal]

I just had my turbo rebuilt, too. I was speaking with the tech about oil pressure restrictors for the oil pressure line. He said if I notice leaks or oil in the intake, I should use one. He said sometimes they need this as the oil pressure is too high for them. From the Google AI... turbo oil pressure regulator is an inline device that controls engine oil pressure, specifically directed to your turbocharger. By maintaining a steady pressure (typically around 40 PSI), it prevents over-pressurization that can force oil past bearing seals, leading to exhaust smoke, oil consumption, and premature turbo

There is always some oil in the intake and exhuast, but any excessive oil is usually because the engine is worn and pressurising the crank-case. This prevents the turbo from draining properly and will push oil out the labyrinth seals on intake and exhaust.

All factory oil feeds and most aftermarket already drop the oil pressure and flow enough. As usual AI doesn't know what it's talking about, it is just regurgitating rubbish it found on the internet.

 

[brownbear]

Oil restrictors are a thing, speak with your turbo rebuilder and ask them.

 

[Dougal]

Oil restrictors are a thing, speak with your turbo rebuilder and ask them.

Yes they exist but they're an unique problem solver that's very rarely used. Turbo companies have oil supply specs and you only need a restrictor if the turbo is passing too much oil out the drain.

Almost every time a turbo is blamed for oil consumption, the problem is the engine and worn piston rings.

 

[AussieHJCruza]

Oil restrictors are a thing, speak with your turbo rebuilder and ask them.

Not for a journal bearing turbo.

 

[mudgudgeon]

Blow by oil, even at normal levels will find its way into the intake pipe and eventually weep through the rubber hose at the turbo housing.
You could try removing the rubber intake house, give everything a thorough clean with a brake cleaner or other solvent, then reinstall.
You'll struggle to reseal an oily intake hose, but a clean hose will bond to clean aluminum and prevent oil weeping past the join for a long time.

Another thing to look at, the early 1hd-t metal oil feed/ drain tube under the turbo was prone to cracking at the oil feed tube/ mating flange junction. Later models, Toyota added a gusset to these.
If they crack, they can puke oil FAST. Definitely worth checking

 

[mudgudgeon]

Oil restrictors are a thing, speak with your turbo rebuilder and ask them.

Shouldn't be needed on a journal bearing turbo