Do my symptoms point to blown turbo seals

[djvoodoo]

Hey SAU'ers. 

Most research points to blown turbo seals/turbos.

Here's the 411.

My car has old -7's with all supporting gear (700cc injectors/splitfires/HKS EVC6/zorst/Walbro pump/cam gears)

Recently had a Vipec installed with wideband.

Compression test came back 170,170,170,170,165,170

 

Car now blows blue smoke on decel ONLY. Very prominent at 3000 rpm. Smells quite oily as well.

Also does not boost to my set boost anymore (20psi). It still boosts fine, but reaches a max of about 17psi in 3rd/4th gear through the rev range.

Do people agree my turbos are letting go?

My compression is quite good, so i doubt it's ring lands or valve seals? It's not smoking at idle or on acceleration.

 

 

 

 

[r32-25t]

Got an oil catch can set up in it?

[djvoodoo]

13 minutes ago, r32-25t said:

Got an oil catch can set up in it?

No catch can. Tuner also recons this is most likely and told me to get one (Very well respected Tuner)

But what i'm unsure of is:

Car never had smoke on decel before getting the new tune. Only started after being tuned which led me to think its a mechanical issue with turbos.

 

[Dobz]

How old are the turbos? It's possible the bearings are letting go.

[djvoodoo]

Unsure of Turbo age.

So my first steps are:

- Install a catch can (was actually thinking of Mines cam baffles) for stealth.

- Drop the cat to see if its melted (see if that's why i'm not hitting full boost)... Although its a new Venom cat which i bought 2 weeks ago.

Then i suppose look at the idea that its the turbos going.

 

I had a quick look at the breather hose going into the rear turbo. I can def see some oil at the tip of the outlet pipe. It's not pools and pools of it, but enough to know it's fresh oil not just residue.

 

[hy_rpm]

Leave it overnight and when you first start it give it a good rev and if it blows alot of blue smoke the valve stem seals are no good
If not possibly turbos or one blown
Need to remove dumps on both turbo to check if theres oil inside and check play

[XGTRX]

First step is to undo one of the intercooler pipes and see if there is oil in it

[Dose Pipe Sutututu]

good, you've taken your car to another tuner after the first one nearly grenaded your motor with timing figures fit for a NA motor

[djvoodoo]

So i've checked both hot/cold side intercooler pipes and there is some slight oil film inside the pipe. It's wet to the touch but it's not pooling anywhere. Could only reach front turbo by hand and there was no shaft play. Rear one could be stuffed though..

I've attached a video. Video was taken after a 20 min drive, while the car is at operating temp (83 deg). Smoke is present when revving and is more white than blue. I doubt it's head gasket. Coolant level is always perfect. No hissing from overflow and has now coolant loss whatsoever.

Turbo is not boosting to set psi (20). I reach around 16 psi max. But, I do have an inlet manifold gasket leak which will be getting fixed shortly.

I have already purchased my throttle/inlet gaskets as well as a set of genuine Nissan Valve Stem Seals. I also have ARP Head studs on the way and a set of HKS GTSS's.

Fun times ahead!

 

smoke.mp4

[Chris32]

Check your pcv valve is functioning and not clogged up