Diagnose my Micra please

Honest John Back Room » Technical matters
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Tue 22 Aug 2006 13:09
Diagnose my Micra please - Miss_M
Car:

Nissan Micra 1997 1.0 Shape
48,000 miles

Symptoms:

Sitting inside the car, with the gearbox in neutral and the clutch out, I can hear a knocking noise that keeps time with the engine speed. When I depress the clutch the knocking noise disappears. In fact I only have to push the clutch pedal a very little and the knocking noise disappears.

The knocking noise can be heard when driving, and doesn't disappear once the engine is warm. If I depress the clutch while driving the knocking noise disappears.

I've listened to the engine and can't hear any obvious 'wrong' noises.

I bought the car without a service history (yes I know!) and so I don't know what work, if any, has been done on the car.

Could this be a worn clutch? There is quite a bit of vibration coming through the clutch pedal and, as mentioned, I only have to push the clutch pedal a very little for the knocking noise to stop.

Anything else this could be?

Thanks. :-)
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Tue 22 Aug 2006 14:17
Diagnose my Micra please - Xileno {P}
I think you've diagnosed it yourself.
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Tue 22 Aug 2006 14:29
Diagnose my Micra please - bell boy
seconded Xileno {P}
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Tue 22 Aug 2006 14:30
Diagnose my Micra please - robcars
Sounds like the clutch thrust bearing!

well diagnosed!
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Tue 22 Aug 2006 15:01
Diagnose my Micra please - Miss_M
The clutch doesn't slip and all the gears are easy to select (apart from reverse that can be a bit awkward).

Would the clutch thrust bearing would be replaced if I had a new clutch fitted?



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Tue 22 Aug 2006 15:11
Diagnose my Micra please - mss1tw
Would the clutch thrust bearing would be replaced if I had
a new clutch fitted?


I believe a lot of people opt for it to be done while they are having a new clutch fitted even if they aren't any noises.

A 'while you're there...' situation.
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Tue 22 Aug 2006 19:32
Diagnose my Micra please - Dynamic Dave
Would the clutch thrust bearing would be replaced if I had a new clutch fitted?


If a clutch kit is used, then yes. The bearing is about the cheapest (##) component in the kit.

## As in terms of comparing the price with the other components in the kit, not in terms of quality.
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Wed 23 Aug 2006 00:53
Diagnose my Micra please - robcars
Has the clutch been changed recently?
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Wed 23 Aug 2006 08:41
Diagnose my Micra please - jc2
Idler gear rattle!!!(reverse gear idler)
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