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HD CBV chewed a ring in my turbo

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j_cd
Posts: 474
Joined: 24 April 2010
Year and Model: 1998 S70 GLT
Location: Los Angeles, CA

HD CBV chewed a ring in my turbo

Post by j_cd »

Image

stupid aluminum!

Image

This ring wasn't there when I took the original Mitsubishi spring out two years ago. I don't think it's a problem, but I could be wrong. This was with the factory recommended wastegate setting for a stock LPT, not a turn more I swear. I also have an HD TCV, since the original Pierburg one failed a while after the turbo rebuild.
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madspeed50
Posts: 157
Joined: 1 August 2012
Year and Model: 1998 S70 T5m
Location: PA

Post by madspeed50 »

gheez, what spring was in there?

Yep, sent from my rooted, rommed Galaxy Nexus....
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j_cd
Posts: 474
Joined: 24 April 2010
Year and Model: 1998 S70 GLT
Location: Los Angeles, CA

Post by j_cd »

That was from the lighter spring, the blue one. I just found a used turbo housing for cheap, removed from a Volvo 40 series. Asked the guy if it had a ring worn in it and he said "Yes, but only about half as bad (as mine)". So I guess even the stock spring can do this. I'll probably just keep using this one then.
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madspeed50
Posts: 157
Joined: 1 August 2012
Year and Model: 1998 S70 T5m
Location: PA

Post by madspeed50 »

thats some uneven spring pressure

Yep, sent from my rooted, rommed Galaxy Nexus....
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j_cd
Posts: 474
Joined: 24 April 2010
Year and Model: 1998 S70 GLT
Location: Los Angeles, CA

Post by j_cd »

Yes it looks uneven. What is the cause of this? Did I not put the spring in perfectly? Bad spring? The housing I was gonna buy has the same thing, just not as bad.

Maybe tightening down the CBV cover tweaked the spring to one side? Perhaps I'll get the Forge CBV, or go back to a stock Mitsubishi spring.
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madspeed50
Posts: 157
Joined: 1 August 2012
Year and Model: 1998 S70 T5m
Location: PA

Post by madspeed50 »

I picked up a new mitsubishi kit but havent gotten to it yet. I'll be sure to check mine out just for the sake of it. I know the oem ones been in there for 220,000 miles so far. Cant see any real harm in the groove but what do i know...

Sent from my rooted, rommed Galaxy Nexus....
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j_cd
Posts: 474
Joined: 24 April 2010
Year and Model: 1998 S70 GLT
Location: Los Angeles, CA

Post by j_cd »

Hey madspeed50, I'd be interested to know if your stock turbo has similar wear from the bypass valve.

I had been planning to put a 15G wheel on this turbo and get an ARD Green ecu tune. More boost could increase the wear even more though, so now I'm not sure what to do. Maybe buy that newer housing with less wear.
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madspeed50
Posts: 157
Joined: 1 August 2012
Year and Model: 1998 S70 T5m
Location: PA

Post by madspeed50 »

I plan on putting in the new spring *sometime*. not really looking forward to it though

Sent from my rooted, rommed Galaxy Nexus....
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