D5 (2005 on) Metallic tapping noise when oil filler cap removed.

[5cilinder]

Originally Posted by passenger

Jeuss bro, that's is probably best answer I ever read. I gave up from searching cause of that noise. Also I bought 20+20 rocker arns and lifters to change it (my mech gave up last minute, I send parts back). Yes, my car has M66

You have pic where did you close?

i have no pic....its only "visible" on the touch with small hands its near the egr cooler reachable with small hands in front of the engine and behind the radiator
Just follow the rubber hoses. Your popping noise could also be or and from other sources where there is a vacuum leak.. engine mounts , break booster

[passenger]

My engine mounts are with oil, I change them all 4. Two are oil, 2 just gummi

[Lancee]

Originally Posted by 5cilinder

i have no pic....its only "visible" on the touch with small hands its near the egr cooler reachable with small hands in front of the engine and behind the radiator
Just follow the rubber hoses. Your popping noise could also be or and from other sources where there is a vacuum leak.. engine mounts , break booster

Perhaps buy a cheap vacuum tester tool ? Test the pipework. If you have any car with a vacuum system always good to keep in the toolbox anyway.

From memory I was once aware of the noise you describe when the oil filler cap was removed. At that time I recall I stopped/diminished the noise by individually kinking the various vacuum hoses. This was some time ago, but I believe the solution was a rear engine mount replacement.

[5cilinder]

Originally Posted by passenger

My engine mounts are with oil, I change them all 4. Two are oil, 2 just gummi

I think they are filled with antifreeze...but need a vacuum to go soft

[5cilinder]

Originally Posted by Lancee

Perhaps buy a cheap vacuum tester tool ? Test the pipework. If you have any car with a vacuum system always good to keep in the toolbox anyway.

From memory I was once aware of the noise you describe when the oil filler cap was removed. At that time I recall I stopped/diminished the noise by individually kinking the various vacuum hoses. This was some time ago, but I believe the solution was a rear engine mount replacement.

Ofcourse its handy a vacuum tester tool, i have one too.
But kinking the hoses to pinpoint leaks is a good way to start..btw the vacuumbox on the egr cooler is impossible to replace but not needed .

[Derek UK]

Maybe https://www.youtube.com/watch?v=QHLyubTrIQ8

[passenger]

I have hydraulic engine mounts

[Isabella33]

Originally Posted by 5cilinder

Let me guess.... you have a manual gearbox?
The manual gearbox versions have a egr bypass wich is activated by a solenoid with the vacuum system ...
The vacuum box almost every time goes bad which means that if its activated the vacuum system draws in air which is disposed in the valve cover where the vacuum pump is located and creates a popping noise.When warmed up the bypass isnt used ...and the solenoid is closed.
What i did it closing the tube right before the box..this means that the cat is slightly longer warmed up...but the coolant will be faster warmed up and no vacuumpump losses (which also impairs the enginemounts)
The auto gearboxes dont have this bypass btw

Hi, sorry for the late reply, no its an Auto box ! Thank you.

[Isabella33]

Hi, No its a Auto Box !

[5cilinder]

Originally Posted by Isabella33

Hi, No its a Auto Box !

And?

Where is the soundclip?