Tapping Noise From Engine?

[ant.7]

hi all

 

this is a tricky one.

 

i have a c5 2.0hdi 2003. there is a tapping noise when excelerating, this seems to be coming fron the engine but isnt there at idle. the noise disapears when at high revs,but comes back if you let the revs drop and then excelerate. it sounds like a tappit?

you can rev hard at idle and no noise.

 

anyone got any ideas?

 

any help as always much appreciated

 

tony

[GreenBlood]

hi all

 

this is a tricky one.

 

i have a c5 2.0hdi 2003. there is a tapping noise when excelerating, this seems to be coming fron the engine but isnt there at idle. the noise disapears when at high revs,but comes back if you let the revs drop and then excelerate. it sounds like a tappit?

you can rev hard at idle and no noise.

 

anyone got any ideas?

 

any help as always much appreciated

 

tony

 

Tony, have a good look at your crankshaft pulley, they are a two part setup metal centre/ rubber and metal outer. These can separate over time giving the early symptoms you describe.

 

Cheers

Chris

[ant.7]

Tony, have a good look at your crankshaft pulley, they are a two part setup metal centre/ rubber and metal outer. These can separate over time giving the early symptoms you describe.

 

Cheers

Chris

 

cheers chris

 

thanks for the info, any chance you could describe where the crankshaft pully is.

first c5 and not found my way round it yet?

 

cheers

 

tony

[Johndouglas]

any chance you could describe where the crankshaft pully is.

 

 

If you look down the front of the engine (the side really, between the engine and the inner wing) where the belts are, the crankshaft pulley is the one right at the bottom. Unfortunately you won't see much from the top. You'll need to take off the wheel and remove the panel on the wing liner. It'll be straight in front of you. This is what you'll see. The belt is removed.

 

http://i69.photobucket.com/albums/i53/Johndug/sides009.jpg

[ant.7]

If you look down the front of the engine (the side really, between the engine and the inner wing) where the belts are, the crankshaft pulley is the one right at the bottom. Unfortunately you won't see much from the top. You'll need to take off the wheel and remove the panel on the wing liner. It'll be straight in front of you. This is what you'll see. The belt is removed.

 

http://i69.photobucket.com/albums/i53/Johndug/sides009.jpg

 

cheers for that john, very helpful ill have a look at weekend on the ramp!

 

thanks again

 

tony