MGF - Whining noise from engine bay
When flipping the throttle by hand and listening from the boot aperture it seems to be coming from the inlet manifold area but i haven't had the engine cover off and had a good investigation.
It's a 98 1.8 non VVC.
Any ideas what it could be or where to start looking?
Cheers
Dave
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- GT MG SPARES LTD
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Replied by GT MG SPARES LTD on topic MGF - Whining noise from engine bay
Posted 11 years 2 months ago #125796Please Log in or Create an account to join the conversation.
Replied by helsbyman on topic MGF - Whining noise from engine bay
Posted 11 years 2 months ago #125804Yes sounds like a good callGT MG SPARES LTD wrote: Hazarding a guess bearings in alternator
BILSTIEN DAMPERS, 4-2-1 MANIFOLD, HEAD WORK BY SABRE.
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I've also taken the timing belt cover off and the belt is not seated centrally on the cam sprockets and showing clear signs of wear (hopefully photo attached) it's showing wear on inner and outer edges so possibly is off centre the other way on the crank shaft.
I was planning on replacing the cam belt anyway and have the kit but don't have a water pump or oil seals (one is leaking and needs replacement) so don't want to do the job twice.
Not sure if the belt/tensioner/water pump is causing the high pitched noise as it's not obviously coming from there but it's certainly making some noise.
Sprayed some contact cleaner around all the inlet manifold and breather pipes and there doesn't appear to be any vacuum leaks. Assuming the timing belt isn't the cause of the noise what parts around the inlet manifold/top end of engine could increase the pitch of the engine note?
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- David Aiketgate
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Replied by David Aiketgate on topic MGF - Whining noise from engine bay
Posted 11 years 2 months ago #125858Could you do a little video/audio of the noise and post it up? Youtube or something...
David
:shrug:
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Having slackened off the belt the water pump is very noisy when turned by hand so i imagine it would be even worse with the engine running. I will try and take some video/audio on my phone later and upload it but this may be beyond my technical capabilities.
So at the very least i'll be replacing the timing belt, water pump and cam shaft oil seals. I've done this before on an old rover 214 K series but the access was a lot better. Not looking forward to doing it on an MGF.
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I wouldn't run the engine with a belt that worn as it could fail.
I would remove the rest of the covers. You should see a witness mark where it is rubbing. Not sure what would be causing the belt to be off centre, but it might not be tensioned enough.
What worries me even more than the wear on the edge is that the belt only looks about 2/3 of the width that it should be. I think it is a lot more worn than you may think.
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You may be able to see in the photo that it is worn considerably in the middle. Must have been siting in the cover for a few years as the belt was changed 4 years ago and i've only taken the top cover off to have a look at the belt when i got the car about 18 months ago. don't know what caused it to shift yesterday and wedge itself where it did, fortunately it made enough noise to investigate the problem.
At least i know what i'm doing over the bank holiday weekend now.
Is the engine mount easy enough to undo/remove to enable the new belt to be fitted?
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This leaves you with plenty of room, like this:
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I haven't got an engine crane, could i support from underneath with a jack and a plank of wood to spread the load across the sump?
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Replied by Alans835 on topic MGF - Whining noise from engine bay
Posted 11 years 2 months ago #125914Thanks
Alan
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