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YOUR RESEARCH996 unfamiliar engine noise
Leading reported evidence
Check any codes
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No successful repair reported for this finding.
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Suggestion
If you have a code reader - check for any codes that show up.
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the car was parked for 2 months or so,, i started the engine last night and heard an unfamiliar ticking sound from rear tire wells,, sounds like valve train noise,,
any idea?
is it due to long park?
If it is the simple tick, tick, tick; then yes, what others have said here - lifter leak down. Rattles or that type of sound is NOT normal. Back the car out into the driveway and keep the rev's around 1000-2000rpm for a minute and then let idle. As the oil pressure lowers as the oil temperature rises - the ticking should disappear. If the ticking continues after your engine temp's have reached normal and the oil pressure reaches around .5 bar to 1 bar then, yes you may have a stuck lifter. Not the end of the world but it will cost you some maintenance from your service provider. A good test is that the ticking goes away with a slight increase in rpm and with foot off the throttle and idling it comes back. If the ticking gets louder when you increase the rpm and doesn't subside - STOP - you have a stuck lifter (or more issues) that need attention. Drive your car more often!
i let the car idle for 20 minutes and i guess its fine now,,
when i rev the engine between 1-2k rpm,, the engine and car vibrate until i reach 3k rpm before it gets normal,, any idea?
Would be great if you could take a short video of it. even iphone is decent at recording sounds during video
I think everybody could learn something.
I have personally heard a lot about those stuck lifters but would be curious to hear one.
Slight misfire? If you have a code reader - check for any codes that show up. Some issues don't light up the CEL (yet) but can still generate a code to alert you to some function outside the normal parameters. You can buy a cheap OB2 code reader at NAPA. From there you can Google the code numbers listed.
lifter leak down. Since it quieted down by idling, no worries about engine noise.
Now go for a good drive, get it nice and warm. Not just idle.
See if you have same issues. Either top off with new fuel -- or run it down and get
a completely new tankful.
Note the DME "learns" and adjusts continuously, so that can influence short term effects.
m
The dual mass FW serves as some kind of vibration dampener. The LWFW can't serve as this so my WAG is the vibration absent any CEL, pending error codes, is you are feeling the missing benefit of the dual mass FW.
Sincerely,
Macster.
This is a source reference. Confirm exact model applicability in the original material.
