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Model specific boards => Golf mk2 => Topic started by: Tubb on 02 June 2009, 23:10

Title: Tapping noise that isnt tappets?
Post by: Tubb on 02 June 2009, 23:10

got a tapping noise coming from my engine,
it sounds abit like tappets but only happens when the engine is under load, the engine is fine when idleing.
ive replaced the tappets and cam chain but its still the same.
anybody have any ideas of what else it could be?

Title: Re: Tapping noise that isnt tappets?
Post by: danny_p on 02 June 2009, 23:19

bottom end,  big ends ?

Title: Re: Tapping noise that isnt tappets?
Post by: mr self destruct on 02 June 2009, 23:22

Pinking? Is your timing ok?

Title: Re: Tapping noise that isnt tappets?
Post by: Tubb on 02 June 2009, 23:26

i re-did the timing last weekend so its not that.
how can i check the big ends/pinking?

Title: Re: Tapping noise that isnt tappets?
Post by: mr self destruct on 02 June 2009, 23:34

If your timing's ok the engine won't be pinking.  :smiley:

Title: Re: Tapping noise that isnt tappets?
Post by: Thom89 on 02 June 2009, 23:37

You can sometimes get a tapping noise from a blown exhaust gasket, particularly if its blowing where the manifold is bolted to the head...
Tom  

Title: Re: Tapping noise that isnt tappets?
Post by: Tubb on 02 June 2009, 23:41

hmmm, il have a look tomomrow, cheers

Title: Re: Tapping noise that isnt tappets?
Post by: DarnPB on 03 June 2009, 12:53

Quote from: mr self destruct on 02 June 2009, 23:34

If your timing's ok the engine won't be pinking.  :smiley:

Not exactly. Depends on how the mixture is set up. If it's running too lean, then pinking is possible. Also if you have a hotspot within the cylinder or the wrong heat range spark plugs, you may also get pinking. :wink:

Title: Re: Tapping noise that isnt tappets?
Post by: Wayne on 03 June 2009, 13:43

Piston slap maybe.

Title: Re: Tapping noise that isnt tappets?
Post by: Tubb on 03 June 2009, 18:59

its not the exhaust blowing as ive just checked that
i think the bottom end's on the way out as its just developed a new knocking noise  :sad:

Title: Re: Tapping noise that isnt tappets?
Post by: neils on 03 June 2009, 21:17

i've come across in the past injectors making a tapping noise (not on a vw by the way).

Title: Re: Tapping noise that isnt tappets?
Post by: Tubb on 04 June 2009, 17:45

i think ive found the cause of the noises now, found a nice split further down the exhaust manifold below one of the 2 -1's
next question....what 16v manifolds are available?
cheers, matt