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BMW 3-Series (E90 E92) Forum
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Chirping diverter valves?
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| 04-09-2017, 03:08 PM | #1 |
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Lieutenant
 
93
Rep 299
Posts
Drives: E92 335i SE 6MT
Join Date: Aug 2013
Location: Lanarkshire, Scotland
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Chirping diverter valves?
When I have the car on a higher power map, I notice when revving at a standstill up to 2000 or 2500 rpm and letting go, that theres a farty chirp type noise coming from the firewall right where the diverter valves are.
Is this a sign they need replaced? Does it do any harm? Seeing as its just when releasing pressure Im guessing it wont cause a boost leak.
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2007 E92 335i 6MT
 | MHD Stage 1 + | Mishimoto Intercooler | Z4 Airbox mod |
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