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Holset won't spin

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Jdevil187

Proven Member
127
13
Aug 3, 2014
Houston, Texas
I'm installing an hx35 on my car, the turbo spun freely by hand before install and after install and cranking the car, it seized up. I spin it with my fingers and its hard to spin for the first turn or two, but after that it frees up again. I crank the car and seizes again. any ideas?
 
Did the car start up when you cranked it ? Was this a rebuild or just a turbo swap ?
 
I mean did you rebuild the engine and this was the turbo you used, or was this the ONLY modification you did (swap the turbo).

If a holset doesn't get oil relatively immediately once a car starts, consider the bearings trash.

Quote:
"4. Oil pressure of 150 kPa (20 lbf/in2) must show at the oil inlet within 3 - 4 seconds of engine firing to prevent damage to turbocharger bearing system. A flexible supply pipe is recommended."
 
It's a turbo upgrade to the original turbo. I switched the feed line from the Ofh and at the first crank car idle for maybe 3 to 5 seconds. I didn't see the turbo spin so I turnde it off. I than pulled the oil line from the turbo and it was dry. Cranked it again with the oil line disconnected and it took a few seconds for oil to come out of the line but didn't have pressure at all.

From what you are telling me it looks like I ruined the turbo my self.....
 
For got to mention that I disconnected the ptu so the car wouldn't start, when I disconected the oil line
 
Last edited:
Correct, it is entirely possible that you may have ruined it if you didn't pre-lube the turbo before install. Even under cranking, you're still creating 4 cylinders worth of pressure that will spin the turbo, let alone once it did turn over for that couple seconds or so. So it was spinning at possibly 10,000 rpm, or more, with no lubrication, and things will get hot quickly when its metal on metal.

For a real professional assessment, you'll have to ask @JusMX141
 
If you (or whoever) assembled the turbo with thick assembly lube, it should be okay. Another possibility is that there isn't enough clearance from the waterpipe hitting the compressor cover and the two housings are being tweaked from the bolted down turbine housing. This actually happened to me when I installed my hx40.
 
I didn't dent in
the water pipe, I bolted the turbo, to line up the housing where the water pipe needed to be dented, and it didn't seem at all like it needed it to be dented! Tomorrow when I get home, Im going to fill up the turbo with oil and check the clearence of the housing.

Thanks
 
Water pipe loading the compressor cover can definitely bind the compressor....if it's bad enough it will bend the shaft.

Otherwise, a turbo will sustain damage in as little as two seconds of use without adequate oil flow.
 
Yes, I had a friend start up the car.

Thanks for the responses, I'm getting ready to pull the turbo and inspect it, but seems like the best thing to do is to go ahead and get it rebuilt.
 
This same thing happened to me just last month. I was drilling a broken turbo hole through my exh manifold and the drill bit broke. I thought i heard it fall to the ground so i thought nothing of it. Finished up the install and when i test drove I got no boost...Fast forward >> I remove the turbo thinking it was seized up (and ready to raise hell with the seller) and as I inspected the turbo i heard a clink clink and i look inside and see a piece of my drill bit, so i flip it upside down and it fell out. I inspect the turbine blades and luckily no damage at all, the drill bit didnt allow the turbine to move but at the same time kept it from doing any damage. I removed the bit and reinstalled and everything was perfect... I got lucky
 
Well, I'm actually embarrassed to share my findings, but every time I'm searching something and find someone with my exact problem, and I read all the way down to the bottom to find out the op never posted what fixed the issue, drives me crazy!!!

So here it goes...

Pulled the turbo and found a paper towel jammed in the exhaust turbine. I must of forgot to pull one from the manifold. I had done some cutting and grinding before the turbo install and this one was left behind.

Turbo spins freely now and seems just fine.


Thanks
 
Well, I'm actually embarrassed to share my findings, but every time I'm searching something and find someone with my exact problem, and I read all the way down to the bottom to find out the op never posted what fixed the issue, drives me crazy!!!

So here it goes...

Pulled the turbo and found a paper towel jammed in the exhaust turbine. I must of forgot to pull one from the manifold. I had done some cutting and grinding before the turbo install and this one was left behind.

Turbo spins freely now and seems just fine.


Thanks
Lol glad it was something simple. We've all had our share of hurr durr moments :thumb:
 
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