Recently noticed a noise on tick over (usually just after a bit of a blast), that I first thought was the Walbro whining as usual. However, it isn't as it's coming from engine bay and sounds a bit like a muffled dot matrix printer (for those of you old enough to have used one..) Not all the time, a bit on and off, then nothing at all..

Have also noticed for some time, that when I turn the engine off I get a squeak just as the engine stops completely. Again not every time..

I'm begining to wonder if one of the ancillaries is on it's way out, any thoughts..?

 

I get a very similar problem with my car. Bit of a squeak just before the engine stops.

Not sure what it could be tho....my guess would be one of the belts

 

loose or splitting heat shield as a starter.
nick

 

maybe your scoobys caught a mouse

 

think yourself lucky,my injectors are quite noisy !!!

 

I'd guess it'll be buckets & shims tapping away and a squeaky drive belt, unless there rattles rather than squeaks.

 

Heat shield possibly, as it would fit in with circumstances, ie expands due to heat soak shortly after a blast and at idle for a few seconds there would no cooling entering the engine bay..!

As the noise is intermittent at the moment I don't think it's valve train noise.

It's a little like the noise a small electric motor (scalectrix- sp?) makes when they're on their way out, although very quite (I doubt I'd hear it with windows open and I'm yet to get it where I can stand over engine to have a proper listen).

Given that something gives an occasional squeak, just as engine stops, I'm thinking towards water pump/alternator bearing on it's way out.

Isn't effected by increasing load on alternator though, nor do I think it's PS pump for similar reasons.

Goung to have a listen around from cold with stethescope later to see if it's anything obvious.

One other possibility could be an occasionally noisy injector, although it doesn't sound right for that IMHO.