Cam Tap/Knock

exeuser · 8th March 2011, 12:48

Hi Guys, Looking for ideas on what is going on with my ZT 190 as when it's idling it has quite a nasty tapping/knocking which seems to be coming from the belt area of engine.

I have ruled out manifold, vis motors and the valve thingy on right hand side of engine.

It increase's with revs although once over 1500rpm it either disappears or i just cant hear it over the sound of the engine, and the engine sounds sweet as a nut when revving or giving it the beans.

In december it had the belts, tensioner and a new water pump fitted and it was making this sound then but the garage never commented on the tapping, just stating they can be a bit noisy.

Is it possible this is just a lazy lifter or something a bit more extreme like small end or big end.

Any thoughts or ideas would be appreciated.

exeuser · 9th March 2011, 11:24

Bump, here is a vid of the offending noise but ignore the banging at the end as that is a neighbour making a racket and not the engine. http://www.youtube.com/watch?v=yhX8V5FATWw

Miff · 9th March 2011, 11:57

Does the noise go when the engine is warm?

exeuser · 9th March 2011, 12:07

No the noise is there when you start from cold and is the same when its warm, it speeds up with revs but gets drowned out over 1800rpm.

8th March 2011, 12:48	#1
exeuser Newbie MG ZT Join Date: Dec 2010 Location: Exeter Posts: 4 Thanks: 0 Thanked 0 Times in 0 Posts	Cam Tap/Knock Hi Guys, Looking for ideas on what is going on with my ZT 190 as when it's idling it has quite a nasty tapping/knocking which seems to be coming from the belt area of engine. I have ruled out manifold, vis motors and the valve thingy on right hand side of engine. It increase's with revs although once over 1500rpm it either disappears or i just cant hear it over the sound of the engine, and the engine sounds sweet as a nut when revving or giving it the beans. In december it had the belts, tensioner and a new water pump fitted and it was making this sound then but the garage never commented on the tapping, just stating they can be a bit noisy. Is it possible this is just a lazy lifter or something a bit more extreme like small end or big end. Any thoughts or ideas would be appreciated.

9th March 2011, 11:24	#2
exeuser Newbie MG ZT Join Date: Dec 2010 Location: Exeter Posts: 4 Thanks: 0 Thanked 0 Times in 0 Posts	Bump, here is a vid of the offending noise but ignore the banging at the end as that is a neighbour making a racket and not the engine. http://www.youtube.com/watch?v=yhX8V5FATWw

9th March 2011, 11:57	#3
Miff Avid contributor 2002 2.5 Connoisseur SE. Join Date: Feb 2011 Location: Sheffield Posts: 223 Thanks: 2 Thanked 4 Times in 4 Posts	Does the noise go when the engine is warm?

9th March 2011, 12:07	#4
exeuser Newbie MG ZT Join Date: Dec 2010 Location: Exeter Posts: 4 Thanks: 0 Thanked 0 Times in 0 Posts	No the noise is there when you start from cold and is the same when its warm, it speeds up with revs but gets drowned out over 1800rpm.