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Turbo whirring noise under boost 700 1989

posted by  motorcycletek on  Wed Oct 13 21:00 CST 2010
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last visit: Tue Dec 28 03:39 CST 2010
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Hello,
we have an 89 740 Turbo and when the turbo starts to boost it sounds like air escaping with some metallic noise, we replaced the turbo when we resealed the head just in case that was the problem, but the noise is still there even with a new turbo. We did not find any turbo or intercooler hoses that were suspect and the turbo by pass valve seems to be working,has anyone seen an intercooler go bad or leak? Any input would be appreciated.
Thanks!





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New Turbo whirring noise under boost [700][1989]
posted by  motorcycletek  on Wed Oct 13 21:00 CST 2010 >


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