renault megane 1999 - Worrying engine noise

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Thu 1 Dec 2011 11:21
renault megane 1999 - Worrying engine noise - spytim

In a nutshell, my engine has started to develop a worrying ticking / clicking noise that is very prominent when doing between 40 and 50mph. in this video i caught it while idling but it isn't always there when idling, i think just when the engine is cold. i have a youtube video of the problem noise:

www.youtube.com/watch?v=qswzi57TEZA

I would really appreciate any insight. the car appears to be functioning normally in terms of performance.

thanks

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Thu 1 Dec 2011 12:31
renault megane 1999 - Worrying engine noise - Peter.N.

The most prominent noise there is diesel knock from one cylinder, its probably a faulty injector, you would expect it to go off at higher speeds, if it doesn't it wants looking at. A diesel specialist would be preferable to a dealer, they usually know what they are doing.

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Thu 1 Dec 2011 13:52
renault megane 1999 - Worrying engine noise - Fernando P

The petrol engine featured in the video clip looks like a K7M 1.6. A light clicking noise is not uncommon when this engine is cold and could be due to valve clearance or, I believe, oil pump valve clicking and should diminish/disappear when the engine is at working temp. But the noise heard from the video clip is bad news and sounds like a big end wear problem. It is time to get advice from a mechanic who is familiar with such engines and can listen to it running at different speeds. BTW is it leaking oil that I can see below the engine?

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Thu 1 Dec 2011 14:31
renault megane 1999 - Worrying engine noise - Peter.N.

A petrol engine, oh dear, well its doing a very good impression of a diesel. Sorry, I have just looked at it again and can see the plug leads, it sounded so much like a diesel I didn't bother to look.

Edited by Peter.N. on 01/12/2011 at 14:33

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Thu 1 Dec 2011 14:53
renault megane 1999 - Worrying engine noise - madf

Could be an exhaust manifold leak - at any joint or a broken pipe. Check carefully for escaping gasses.

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