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Zeroclearance Zeroclearance is offline
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Join Date: Apr 2005
Posts: 24
The "coating company" can not etch every nick and cranny inside the header.. Nor can they clean/etch the interior of a turbine housing. You have to have a mechanical bond on every surface. The ceramic coating flakes off and makes contact with the turbine wheel. With a wheel that can turn 140-160K RPM it doesn't take much to incure FOD (foreign object damage) to the turbine blades. The removal of metal from impact will greatly effect the balance of the rotating assy. Accelerated bearing wear will occur.. After this, you get contact between the rotating wheel assy and the housing on both sides of the turbocharger.. And yes, I have seen this happen many times..
Old 11-02-2006, 10:54 AM
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