It's hormonal again.
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St. Anger

Original Poster:

1,125 posts

204 months

Thursday 16th February 2012
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Well, looks like that time of month where the little '5 is due to give me another bill. This time however, I'm not sure what's wrong with it so I look to PH for some wisdom.

On Monday I thought I was beginning to have problems with the clutch, very very occasionally when pulling away in first it would do an alarming stutter at the bite just after the gear was engaged - the first couple of times I actually thought I was just driving over a pothole, the same kind of jerk.

On tuesday, I was coming down the bypass home from Uni when I heard another alarming noise. This time it was a sort of clattering noise which occured occasionally when lifting off in 4th and 5th gear. From what I am able to tell, it seems to be coming from slightly forward of the dash all the way through the centre console into the cabin - this makes me think it might be something to do with the gearbox?

I took it to a well trusted garage and explained the symptoms this morning, the owner/mechanic took it for a good run to see what he thought and surprise surprise, it never made any noises. He said that the clutch and gearbox felt perfectly fine to him but he did pick up on it having a cracked exhaust and suggested it could be something as simple as the mounts rattling about, taking it back to get it up on the ramps on Monday though for a better inspection.

What does the PH massive think? FWIW, it's a 1.6 NA which has done about 85K.




JFReturns

3,783 posts

194 months

Thursday 16th February 2012
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Have you ever replaced the clutch slave cyclinder?

St. Anger

Original Poster:

1,125 posts

204 months

Thursday 16th February 2012
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I haven't, only had it since August and to be honest it has probably never been done before that! Is that what it sounds like?

JFReturns

3,783 posts

194 months

Thursday 16th February 2012
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Well, probably not. When mine went the clutch pedal got softer before failing rather than the jolting you experienced. It is a cheap preventative measure, so you should do it anyway to save a breakdown.

MX-5 Lazza

7,954 posts

242 months

Thursday 16th February 2012
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Sounds more like a misfire to me. Suspect plug leads.

St. Anger

Original Poster:

1,125 posts

204 months

Friday 17th February 2012
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Don't think it's misfiring, Lazza - it doesn't make any un-natural noises in neutral at all, so for that reason I ruled out the engine block. Several mechanics this week have told me everything feels fine with the clutch and the box and not to worry about it, but I still think something is definately broken/loose.

I'm beginning to think it might have something to do with the propshaft, the noise is definately coming from that area but I don't have a clue where to start with diagnosing it!

MX-5 Lazza

7,954 posts

242 months

Friday 17th February 2012
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Get yourself on http://mazda-mender.co.uk/ and post the problem on there wink

Munter

31,330 posts

264 months

Friday 17th February 2012
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Lifting off noise. It's not the exhaust heat shield rattle is it?

Doesn't explain the clutch thing I'll give you. But thinking it might not be connected.

St. Anger

Original Poster:

1,125 posts

204 months

Saturday 18th February 2012
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Beginning to think they're not connected too. Don't think it's the heat shield as that rattled in the past and it's a very differnt noise - the gents over at mazda-mender suggest a similar scenario though, will look into exhaust problems when it goes back to the garage on Monday then report back.

St. Anger

Original Poster:

1,125 posts

204 months

Monday 20th February 2012
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Well, just back from the garage and we've ruled out exhaust/heat shield problems, now beginning to think it could be gearbox/engine mounts but unfortunately couldn't really check them up on the ramp as the engine obviously wouldn't be under load.

It's definately getting louder now though. hehe

Pete Franklin

849 posts

204 months

Monday 20th February 2012
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If they are unrelated I would say the rattle/ clatter noise that you described is a a worn/ noisy spigot bearing. if the noise happens again- try pushing the clutch in whilst coasting and see if it goes away, this would indicate that it is clutch related and posibly the spigot bearing. if so- its a cheap part but you need to remove the clutch to change it I personally wouldnt bother unless you are overly concerned (I ran mine for years without any other ill effects)

St. Anger

Original Poster:

1,125 posts

204 months

Friday 23rd March 2012
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Clutch failed coming out at a roundabout today, but I managed to get it towed home and found this.


DSCF3683 by St_Anger1, on Flickr

Where it's supposed to be;

DSCF3684 by St_Anger1, on Flickr

Unsure if it's related to the noise I was hearing, but it's off the the garage on Monday for closer inspection.

Munter

31,330 posts

264 months

Friday 23rd March 2012
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Holy st!

Clutch failure due to seized diff? Time for an LSD if you don't have one already.

St. Anger

Original Poster:

1,125 posts

204 months

Friday 23rd March 2012
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No idea, I think it already has/had an LSD, but it's pretty fked now. hehe

Everything is fixable though, plenty of running gear for sale from breakers if the gearbox is FUBAR'd too.

Mr MXT

7,774 posts

306 months

Sunday 25th March 2012
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I'm sure there is a joke here about a welded diff.