Engine Nocking / poping Noise

[Shafi]

Hi Guys,

Yesterday I started hearing a knocking / popping / like “water dripping” noise from the engine!
It comes mostly from the head around the oil filling cap.
Here’s a recording:

You can hear it at the beggining, then less as I moved the phone towards the back, and then again when I move it forward towards the oil filling cap.

The car drives fine and does not overheat or anything. Head gasket was done recently, new spark plugs.
Any ideas?

Thanks

Attachments:

• 106GTInoise.zip

Topic

[Shafi]

[quote=”wysetech” post=76236]from listening the noise frequency is half of the crankshaft speed.[/quote]

Now that’s what you call a Musical Ear banana:

[Shafi]

Thank you guys for all the help
Well I guess I’m gonna have to take the covers off again 🙁
Should I try the flush before that and cleaning the sump and oil pump components, replacing oil and filter?
I do replace my oil and filter regularly and use Valvoline MaxLife 10W-40 and OEM filter.
Could it be a hydraulic lifter or more not getting enough oil?

[Bill]

My musical ear comes from 45+ years of practice 😉 . On thinking more about your problem , remove the covers and check every cam lobe for wear.

[Shafi]

Hi again guys and thanks for all the help,

Problem found/solved finally as it turned out in all different direction.
One of the 3 month old Denso Iridium Power plugs had failed! the middle isolating part had just separated from the plug housing/metal part and it was causing all the trouble! I wouldn’t have thought about it since I’ve just replaced the plugs 3 months ago!
Here’s a video of it:
[video]http://www.youtube.com/watch?v=TGY5VSFJZ_s[/video]

http://youtu.be/TGY5VSFJZ_s

Guess I’m moving to NGK Iridium IX..

Cheers

[college man]

Good find. Must have been a Monday or Friday when the plug was made. 🙂

[Shafi]

LOL 🙂

[Author]

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