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Author Topic: Tap Tap Tap....  (Read 1557 times)

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mv6copcar

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Tap Tap Tap....
« on: 05 May 2007, 23:36:22 »
i have a strange one...while driving on the motorway, and sometimes on the b roads.

the engine seems to tap really loudly when im just cruiseing-just feathering the throttle.

as soon as i give it some gas it stops,likewise when im breaking(using the engine to slow down)

sounds like if the tappets aren't under pressure(load) there tapping real bad.

Any ideas??

regards
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Markjay

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Re: Tap Tap Tap....
« Reply #1 on: 05 May 2007, 23:59:33 »
Leaking exhaust manifold gasket?

If the tapping is also evident while idling, can you indentify if it is coming from one side of the engine?



« Last Edit: 06 May 2007, 00:00:40 by markjay »
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Markjay

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Re: Tap Tap Tap....
« Reply #2 on: 06 May 2007, 00:01:43 »
By the way, I drove through Halstead today on the way to Sudbury and again on the way back...
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sounds2k

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Re: Tap Tap Tap....
« Reply #3 on: 06 May 2007, 10:53:34 »
hmmm ... I'm wondering if it could also be to do with the EGR as that activates on part throttle ... ??
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TheBoy

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Re: Tap Tap Tap....
« Reply #4 on: 06 May 2007, 11:56:50 »
Any particular rpm - thinking along lines of a resonance type rattle, eg heatshields...
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mv6copcar

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Re: Tap Tap Tap....
« Reply #5 on: 06 May 2007, 19:24:34 »
will check the exhaust gaskets,it is strange as it does only happen when at revs between 2,000 rpm -3,500 rpm. usually on the motorway.

yes to the EGR valve symptoms-only at part acceleration it taps.

bugging me though as its getting louder and more concerning

regards
carl
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STMO123

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Re: Tap Tap Tap....
« Reply #6 on: 06 May 2007, 19:26:33 »
Try blanking the EGR valve, that will eliminate it.
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