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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Rattle/tick



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      05-20-2015, 03:38 PM   #1
Dirtynorth
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Rattle/tick

Hi guys
First off my name is Jason and I'm new to the forum. Bought my 335i back in January of last year with 44k miles. It's an m6 car with dinan stage 2 and the dinan cf intake.
After I bought the car I heard about the walnut blasting procedure to clean out the intake valves. I had the procedure done and shortly after the car started ticking. No performance issues, no codes. I've tried different oils and nothing changes. Originally I had thought it was the turbos based on some initial n54 posts I read. The dealer confirmed that it was not the turbos and furthermore the HPFP and the turbos had already been replaced under warranty by the dealer under warranty at 20 and 30k miles.

The tick is intermittent. when the car is first started, it doesn't tick. Only starts after the idle drops down 30 seconds or so after you start it cold. Sometimes it's louder sometimes it's quieter. I have heard some people talking about the Evap valve being the culprit. Any way to check this?
Also I have upgraded to the rb pcv valve in hopes it was a clicking or stuck pcv valve.
Any help would be appreciated thanks!
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      05-20-2015, 04:20 PM   #2
Jeff@TopGearSolutions
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This is likely a normal ticking sound.

Next time you hear the ticking, rev the engine. If the tick goes away and comes back a few short seconds after, it's normal.

That would be some fuel pressure relief valve ticking, again, normal.
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      05-20-2015, 04:26 PM   #3
Dirtynorth
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Good to know. Thanks. I assumed it was fine it's been doing it a while now with no noticeable issues. Just annoying
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      Yesterday, 08:57 AM   #4
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Nice

Quote:
Originally Posted by Jeff@TopGearSolutions View Post
This is likely a normal ticking sound.

Next time you hear the ticking, rev the engine. If the tick goes away and comes back a few short seconds after, it's normal.

That would be some fuel pressure relief valve ticking, again, normal.
Thanks for information! My car did this as well and always wondered what it was.
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