What could be the cause of 3 failed turbos?

[anonymous-user]

MDMA . said:

Have the 3 failed turbos all be "re-built" at the same place? This could be the problem.

I have only had it done at one place, not sure who the previous owner used.

[MDMA .]

Who is re-fitting it after it comes back? 100% sure that new oil feed pipes are fitted with new banjo bolts and copper washers?
You also started it up just for a few seconds at first, no revs. Then after checking all is ok let it idle until oil is up to temp?

[TerzoNeil]

on the jdm quad avcs engines as fitted in legacy gt

there is a oil filter gauze inside the banjo bolt which supplies oil to the avcs oil system on the drivers head

the same banjo bolt is a t piece unit, with 2 oil pipes, one pipeto avcs and other oil pipe supplys the turbo charger

there is plenty of youtube videos on this and how bad they become which restricts the oil flow to the turbo

they take out the filter gauze from inside the banjo bolt and refit

[anonymous-user]

MDMA . said:

Who is re-fitting it after it comes back? 100% sure that new oil feed pipes are fitted with new banjo bolts and copper washers?
You also started it up just for a few seconds at first, no revs. Then after checking all is ok let it idle until oil is up to temp?

The same guy that does most of my mechanical work. New oil feed and return pipes are not fitted as these are rigid metal pipes and are clear. New washers are fitted but the banjo is original, it is just a bolt with a hole so can't really fail.

Yea is it idled to check for leaks before any revs. Everything seems to be pointing towards the turbo being at fault.

[HSV_V8]

The VF36 can be quite a noisy turbo, it is specific to the Spec C cars with titanium shaft/turbine and roller bearing, the STI twinscroll runs the VF37. If it's running more boost than stock this could make it more noticeable maybe? I know I've asked the same question to TDR and they said it was completely normal to have this extra noise on boost.

[anonymous-user]

HSV_V8 said:

The VF36 can be quite a noisy turbo, it is specific to the Spec C cars with titanium shaft/turbine and roller bearing, the STI twinscroll runs the VF37. If it's running more boost than stock this could make it more noticeable maybe? I know I've asked the same question to TDR and they said it was completely normal to have this extra noise on boost.

Unfortunately it got louder and louder and was making a noise at idle and off boost. It was very quiet at first.








The wheel looks mint, zero play in the shaft but the bearings are noisy whe you spin it. It is being dropped off with the refurbisher today.

Edited by anonymous-user on Saturday 10th October 09:13

[uncleluck]

That’s not a very VF36 looking compressor wheel. I take it it’s some sort of hybrid?

If it’s supposed to be stock I’d probably start again with a fresh original.

[MDMA .]

uncleluck said:

That’s not a very VF36 looking compressor wheel. I take it it’s some sort of hybrid?

If it’s supposed to be stock I’d probably start again with a fresh original.

New genuine one below. The compressor wheel does look different.

[anonymous-user]

uncleluck said:

That’s not a very VF36 looking compressor wheel. I take it it’s some sort of hybrid?

If it’s supposed to be stock I’d probably start again with a fresh original.

Yes it had a billet wheel put in during the last rebuild

[anonymous-user]

Looking at scrapping the turbo and going with an SC42 and a few upgrades instead.

[TEKNOPUG]

If it has not been dynamically balanced with the new wheel it will chew through the bearings in no time.