Wastegate leaking...need parts!
03-17-2007, 10:54 PM
#1
Burning Brakes
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Join Date: Apr 2006
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Wastegate leaking...need parts!
I started searching through 250 wastegate-related posts, and got tired after finding one that spoke of the same issue I'm faced with, as copied here:
When I tried to rebuild the OEM WG, I found out that there was a sizable leak around the WG valve guide. This is the small hole where the open/close valve moves up and down. When I put air pressure to the actuating side of the WG, I could hear air leaking out of the guide.
I spent the better part of a beautiful sunny morning disassembling my stock wastegate to discover that my lack of boost "waste" appears to be due to the valve stem-to-valve guide clearances being sufficiently worn to allow air to pass through. I need to blow about 25 pounds of pressure into it in order to open the valve, because of the air escaping through the guide. And since I'm not running a 1.7 bar boost (good Gods, man!) this will never do.
I would think that a person could get his hands on a new guide and have a machine shop ream it out to spec.....IF a person knew the spec tolerances and a source for parts. Can anybody help me out here?
When I tried to rebuild the OEM WG, I found out that there was a sizable leak around the WG valve guide. This is the small hole where the open/close valve moves up and down. When I put air pressure to the actuating side of the WG, I could hear air leaking out of the guide.
I spent the better part of a beautiful sunny morning disassembling my stock wastegate to discover that my lack of boost "waste" appears to be due to the valve stem-to-valve guide clearances being sufficiently worn to allow air to pass through. I need to blow about 25 pounds of pressure into it in order to open the valve, because of the air escaping through the guide. And since I'm not running a 1.7 bar boost (good Gods, man!) this will never do.
I would think that a person could get his hands on a new guide and have a machine shop ream it out to spec.....IF a person knew the spec tolerances and a source for parts. Can anybody help me out here?
