Jump to content
SAU Community

Recommended Posts

Hi, rb25det with hks turbo, car was garaged for a few years and a day at tracknoticed the blades evenly chipped and oil in intake side of turbo. Looking for advice to prevent and also tips to repair before disaster strikes. Cam covers piped to catchcan, so only return to intake is via bov. Thinking could be oil return lines blocked and being pumped through bearing seal into intake, then hitting amd damaging blades. If i clear oil return lines, should i also rebuild turbo?

How do i post a pic?

Thanks in advance

Bruce

Turbo sounds like it is rooted.

Sounds like it has a lot of play and the compressor wheel has been touching the compressor housing.

Oil is highly likely because the turbo seals are starting to fail.

Rebuild or replace turbo.

If the damage is in the centre of the blades and not around the edges, then it's nothing to do with the core.

Some debris has clearly gone through the turbo at some point so a good start point would be looking @ the filter choice/setup.

Won't be anything to do with the oil return as the stock return setup leads to oil in the intake anyway.

Best to see an photo. Damages on the top means foreign object while on the side means cartridge failure or bent shaft.

Its rare to see an compressor wheel break while without the presence of foreign object or cartridge failure this days. This happens only if the compressor wheel it self is not designed for high shaft speed or high boost applications. Those type of wheel generally has very straight and tall blade profile, like certain version of the To4bs that are made for generators.

post-59358-0-28919800-1347088664_thumb.jpg

Hi Guys,

thanks for the feedback.

the wear is even of each blade, sounds like its debris through the cone type apexi filter? setup if filter, thru Z32 AFM then stock intake pipe with the cam cover return blocked off (returning to catch can instead).

while this would effect peak power efficiency, I just want realiability for track at the moment, do you guys think this is sustainable, or should I get the wheel replaced? indicative cost if I take the turbo body into a shop?

thanks

Bruce

That is not cause by oil, or lack there of. That's dirt/fine stone/debris going through the comp wheel at some point.

I've had Apexi filters and never seen any damage like that.

HKS Mushroom filters have the name "poisonous" for a reason as they tend to collapse in the centre (on the inside) over time and send foam through the intake which isn't a good thing and you generally won't notice until it's lost a bit of material already... Seen two do it over the years. Would not use one given a choice.

apparently oil filters are not the best option with mass airflow meters, the oil vapor fowls the electrode,,,?

Lots of people use the oil K&N, it might be an issue technically... But it's certainly not prolific as no one can think of has had any issues including myself.

That is not cause by oil, or lack there of. That's dirt/fine stone/debris going through the comp wheel at some point.

I've had Apexi filters and never seen any damage like that.

HKS Mushroom filters have the name "poisonous" for a reason as they tend to collapse in the centre (on the inside) over time and send foam through the intake which isn't a good thing and you generally won't notice until it's lost a bit of material already... Seen two do it over the years. Would not use one given a choice.

thats good then cause im not keen on oiling filters, would having a cold air intake in the lower front bumper collect this kind of dirt/bad idea ? i know for wet weather its a bad idea obviously, but otherwise it seems perfect, series 2 that is.

Edited by SliverS2

I'd also be worried were the debris ended up that caused the damage.. If you can get hold of a bore scope it may be embedded into the piston or cylinder head. Hopefully it just kept going on it merry way out the exhaust pipe. Its definately dirt,debris..Does the AFM still have the mesh in it?

  • 3 weeks later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • You just need to remove the compressor housing, not the entire turbo. I would not be drilling and tapping anything with the housing still on anyways. 
    • So, I put my boat on a boat. First of all, I'm going to come out and say it. Why is Tasmania not considered a holy goal, an apex that all road-legal modified cars go to, to experience? This place is an absolute wonderland of titanic proportions. If people are already getting club runs for once in a lifetime 30 person cruises to Tassy then I've never seemed to see it. It is like someone replaced the entire place with an idyllic wonderland for cars, and all of the people living there with paid actors who are kind, humble, and friendly. Dear god. After doing a lap of almost all of the place I've found that it's a great way to find out all of the little things that the car isn't doing quite right and a great way to figure it all out. All in all, I drove for 4 hours a day for a week and nothing broke. I didn't even need to open the engine bay. This is by all means a great success, but it has left me with a list of things to potentially address. I also now have a 3D printed wheel fitment tool which annoyingly hasn't got any threads in it to actually assemble it. I might be able to tape it together to check the sizing I actually want to use, but it'll likely involving pulling the shocks out to properly measure travel at least at the front, and probably raise the car while I'm at it, at least in the rear. I scraped on quite a few things and I'm not sure how else to go about it. I was taking anything with a bump at what felt like 89 degree angles. And address those 10 other tasks. And wash the car. God damn it is dirty. And somehow, the weather was perfect the entire time - And because I was on the top of Mt Wellington it turns out it was very much about to freeze up there. I did something I typically never do and took some photos up there in what must have been -10 and the foggy felt like suspended ice, rather than mere fog. If you own a car in Australia, you owe it to yourself to do it.
    • Damn that was hilarious, and a bit embarrassing for skylines in general 😂 vintage car life ey. That R33 really stomped. Pretty entertaining stuff
    • Hi, I have a r32 gtr transmission. Does any of you guys have an idea how much power it will hold with the billet center plate and stock gearset? At what power level and use did yours brake with or without billet plate? Thanks, Oystein Lovik
    • Saw this replica police car based on a Mitsubishi Starion XX parked next to a 'police box' (it's literally a box) in Hirohata, Himeji City in Hyogo prefecture the other day. It's owned by Morii-san who is a local Mitsubishi Starion enthusiast. According to a local radio station blog post, he always wanted to make a police car himself based on ones he saw in his favourite Manga comics.  As it's illegal to modify a car to look like a police car and drive on the road, Morii-san tried many times to get permission from Aboshi police station headquarters nearby. They refused initially by after they got tired of that they granted him permission. However, the car can only be displayed on private property and obviously can't be registered as long as the police livery is present. The car was completed at a cost of 1.5 million yen (US$ 10,000) in addition to the car cost. A location was chosen outside Hirohata Police box where the car can easily been seen from the street. Morii-san has two other Starion road cars, both widebody GSR-VRs.
×
×
  • Create New...