What could be the cause of 3 failed turbos?
Discussion
I have an impreza STi twin scroll with a roller bearing vf36 turbo.
When the previous owner bought the car it had to have a replacement turbo as it was becoming whiney and sounded like a police siren.
He drove the car with a knackered radiator and overheated it cooking the head gaskets. I bought the car had the head gaskets replaced heads skimmed etc and the whining started to become noticeable again. I sent the turbo off to be replaced and after 1k miles it has started becoming noisy again..grrrrr. The turbo has not lost any power and holds boost at 1.4bar no problem but is getting noisier and noisier.
The turbo refurbisher has suggested to check that it has the correct restrictor in the oil feed. I have had the turbo removed and will send it back to him along with the banjo bolt with the restrictor attached. The turbo is getting lots of oil so I am not confident this is the problem.
Anyone come across this before? Any ideas what might be the problem if the restrictor is correct? It is becoming an expensive issue and I dont want to just get it refurbed again and try my luck with no actual resolution.
Any suggestions or help appreciated. Thanks
When the previous owner bought the car it had to have a replacement turbo as it was becoming whiney and sounded like a police siren.
He drove the car with a knackered radiator and overheated it cooking the head gaskets. I bought the car had the head gaskets replaced heads skimmed etc and the whining started to become noticeable again. I sent the turbo off to be replaced and after 1k miles it has started becoming noisy again..grrrrr. The turbo has not lost any power and holds boost at 1.4bar no problem but is getting noisier and noisier.
The turbo refurbisher has suggested to check that it has the correct restrictor in the oil feed. I have had the turbo removed and will send it back to him along with the banjo bolt with the restrictor attached. The turbo is getting lots of oil so I am not confident this is the problem.
Anyone come across this before? Any ideas what might be the problem if the restrictor is correct? It is becoming an expensive issue and I dont want to just get it refurbed again and try my luck with no actual resolution.
Any suggestions or help appreciated. Thanks
Is the oil feed pipe ok? If it's not getting oil to it it's not going to last long.
I used to sell a lot of turbos for the Peugeot 1.6 diesel which were really bad for going but you also had to replaced the oil strainer and feed pipe as they got blocked and were usually the cause for killing the turbo
I used to sell a lot of turbos for the Peugeot 1.6 diesel which were really bad for going but you also had to replaced the oil strainer and feed pipe as they got blocked and were usually the cause for killing the turbo
This is the thing, it seems to be getting plenty of oil. The strainer etc was all cleaned out when the engine was apart for the head gaskets. No leaks and seems to be getting load of oil.
Would the size of the restrictor be a big issue? Would it affect the spray pattern in some way? Could getting too much oil be a problem as my mechanic says he thinks the restrictor in the banjo is quite large.
A new turbo is 1500quid and refurb is 700. Reluctant to buy a brand new one when it has already killed 3.
Would the size of the restrictor be a big issue? Would it affect the spray pattern in some way? Could getting too much oil be a problem as my mechanic says he thinks the restrictor in the banjo is quite large.
A new turbo is 1500quid and refurb is 700. Reluctant to buy a brand new one when it has already killed 3.
snotrag said:
Elatino1 said:
This is the thing, it seems to be getting plenty of oil.
Where does it drain to - is the drain line clear? No crank case pressure pushing it back up the drain, or drain line blocked/kinked etc? Elatino1 said:
This is the thing, it seems to be getting plenty of oil. The strainer etc was all cleaned out when the engine was apart for the head gaskets. No leaks and seems to be getting load of oil.
Would the size of the restrictor be a big issue? Would it affect the spray pattern in some way? Could getting too much oil be a problem as my mechanic says he thinks the restrictor in the banjo is quite large.
A new turbo is 1500quid and refurb is 700. Reluctant to buy a brand new one when it has already killed 3.
First you said it is getting lots of oil...now you say "it seems" to be getting plenty of oil. Or "seems" to be getting a load of oilWould the size of the restrictor be a big issue? Would it affect the spray pattern in some way? Could getting too much oil be a problem as my mechanic says he thinks the restrictor in the banjo is quite large.
A new turbo is 1500quid and refurb is 700. Reluctant to buy a brand new one when it has already killed 3.
So which is it ? How have you verified it IS actually getting oil ? Not seems....get facts.
Too much oil is not your problem...a lack of oil most likely is your problem.
Confirm it is actually getting oil, by cranking and checking there is a good clean supply of oil at the turbo oil inlet.
And whoever refurbed the turbo should have been able to tell you the mode of failure of the old unit.
As for a strainer...which strainer are you referring to ?
Evoluzione said:
You can read a failed turbo like a failed engine or a spark plug.
Given your vague post with no strip down or pics then a good turbo reconditioner is the person to ask, not the person who did it last time either for obvious reasons.
Problem is I can only find one company that refurbish the vf36 so dont have many options.Given your vague post with no strip down or pics then a good turbo reconditioner is the person to ask, not the person who did it last time either for obvious reasons.
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