C4 Vtr_+ 1.6 Petrol Sounds Like Engine Tapping

[ant500]

ok I hoping this is a common problem and load of you can tell me whats wrong lol

 

 

c4 vtr+ 1.6 petrol 2007

 

1 start engine in the morning and rev engine sounds like tappets rattling

 

2 start engine and allow to warm up no tapping

 

3 when engine warm up no tapping at all

 

4 from cold start engine and rev up tapping is heard but if you hold revs or release

accelerate  no tapping so its not the tappets

 

 

so any ideas plz

Edited December 4, 2013 by ant500

[paul.h]

welcome to the forum.

 

If not tappets, you could check the crankshaft pulley - some engines use one with a rubber part that deteriorates.

[ant500]

thanks for getting back

 

so that would cause the tapping noise when I accelerate when the petrol engine is cold then ???? is this a common problem then ????

Edited December 5, 2013 by ant500

[paul.h]

There was something a bit similar on a C5 rrecently and the owner put a link to a video with the sound - worth having a look for it.

[ant500]

hi thank you for your help I did look in the c5 forum but could not find the video would you have a link ?/?

[paul.h]

A link to the C5 post with the faulty crankshaft pulley, post 16 http://www.citroen-owners-club.co.uk/citroen/topic/20707-c5-knocking-when-cold/

[ant500]

thanks for the link mine does not sound as bad as that

mine is a petrol engine but I will take a look at the pulley but just waiting for a fine day to take a look

just did 300 miles yesterday in it and apart from when its cold did not miss a beat and I was getting 39.1 mpg out of it