just murdered my holset

[godfather75]

Just found out that I blew my hx35 after about 2000 miles and a .078 restrictor feeding from the oil filter housing has anyone else had this problem? My car started to smoke on the way home today after some spirited driving and when I took my intake pipe off the compressor wheel has crazy amount of play. Could the restrictor be too small for it, I ported my oil filter housing and my oil pressure is around 18psi at idle.

 

[LiquidX]

Did you test the oil pressure at the turbo inlet at all RPMs?

 

[JusMX141]

Can't say what caused the damage for sure without a teardown- there's a chance the oil is somehow contaminated. Generally-speaking these turbos hold up very well when sourced at the filter housing using the proper restriction to keep the pressure within the required levels.

Ask Scott how much Holsets like contaminated oil.

 

[LiquidX]

Har har har...

 

[godfather75]

No I didn't test the oil pressure at the turb inlet, but I will now. I don't think oil contamination had any thing to do with it, I change it every 2000 miles. I changed it when installed and a few weeks later when I resealed my oil pan.

 

[jwahl16]

What size drain were you using? If that was too small then that could cause your problem as well.

 

[godfather75]

I'm running a -10 an pushlock. I was going to try a -12 an but couldn't find a fitting that would fit with out hitting the housing.

 

[LiquidX]

-12an is the minimum that's required. Holset spec wants 19mm for a drain and the -12 is the closest to it. Some had been fine with -10 but others have had problems.

 

[bastarddsm]

Too small of a drain is not going to cause bearing failure. It may cause oil to get blown by the seals, but certainly not bearing failure.

OP if you get another you need to check the oil pressure AT THE TURBO, at all speeds. Make sure you have between 40-80psi when its hot at high rpm. Its pretty simple really.

 

[JusMX141]

I'm going all-in on some type of oil contamination. Your restricted source should have no trouble draining through a -10AN drain.

I've seen one Holset turbo which showed signs of too-little oil when fed from the filter housing using a .078" restrictor, and this customer was running almost 40psi with the turbo in question. It didn't even have shaft play when it came to my shop for a compressor wheel replacement- it was showing signs of eventual failure, but it was still well within the service limit with nearly one whole season of use.

That in mind, as long as you have it sourced at the filter housing you're really not going to do irreparable damage unless the restrictor is far too small, and yours is definitely not.

 

[godfather75]

I'm gonna tear it down this weekend and see how it looks. Where can you get a -12an fitting that will clear the housing?

 

[96WhiteTSi]

Did you test the oil pressure at the turbo inlet at all RPMs?

How does one test the oil pressure at the turbo inlet? Im not sure how this can be done...

 

[LiquidX]

You hook the oil gauge at the oil inlet so the oil pressure reading is going to reflect exactly what the turbo is recieving.

 

[red1993gsallmt]

Just make one out of 3/4 copper and 2 45*s like i did, i have over 10,000mi on my hx40 and boost has never been set lower then 25psi, for the last 10 months its been at 30psi, and i beat the heck out of it. no fancy motor oil either just napa synthectic 10w-30. heres a link to my old thread

http://www.dsmtuners.com/forums/turbo-system-tech/347049-those-you-afraid-use-holset.html

 

[laserspeeddemon]

Sorry, I had to do it.

 

[BigBeans]

You could always send a sample of your oil out to see if there are contaminants that didn't come from the turbo.

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