Freelander 1 Hi My 2004 Freelander 1 only had 80k miles and recently unusual excessive engine sound only when idling. When accelerated tapping sound diminishes.

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Any cause please. Oil level , temp all OK. Kwik fit tested exhaust and manifold all no leaks.

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Anan

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leicester
Hi My 2004 Freelander 1 only had 80k miles and recently heard unusual excessive tapping engine sound like blown exhaust. Only when idling, When accelerated tapping sound diminishes and drives normally. When foot off the accelerator knocks again. Exhaust checked with kwikfit no leaks. Water pump cooling ok. Oil level fine. Any cause please. Terrible sound stopping at signals.
 
your not confusing mechanical tapping,
with diesel 'knock' .. per chance ???
[ i say that 'cause certain things .. like an injector fault can cause loud diesel knock
[ like when it can't deliver multiple injections per cycle

the vac pump can sound like a tapping sound ..
more evident at idle ..
but it's not a particular loud or unexpected noise .. normaly.
 
hd3 said:
your not confusing mechanical tapping,
with diesel 'knock' .. per chance ???
[ i say that 'cause certain things .. like an injector fault can cause loud diesel knock
[ like when it can't deliver multiple injections per cycle

the vac pump can sound like a tapping sound ..
more evident at idle ..
but it's not a particular loud or unexpected noise .. normaly.
Click to expand...
 
I sent a audio file from 0 to idle and gradually accelerating and decelerating any idea
 

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audio file ???
[ it's an image only in your post .. no audio.
[ take the vid clip and upload to youtube
[ then paste link into a post.
[ you'll need to setup a youtube channel first
 
Anan said:
Thank you
Click to expand...
Hopefully not
GrumpyGel said:
Crank pulley delaminating?

Shine a torch on it when engine idling and see if there are any shiny metallic particles floating around it.
Click to expand...
Thank you
Anan said:
Thank you, let me try will upload a video soon guys. Not joking having this Freelander since 2014, I am tuned to the idle sound so any difference my ear is well tuned to
Click to expand...
First instance the sound suggests manifold end of exhaust leak. Kwik fit checked out and said no exhaust problems suggested to check water pump bearings. Cooling system working fine.
 
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