MRVirgin
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RE: My 1990. 20/02/11 New wheels
2012/04/11 17:00:43
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I'm starting to think this is not the problem Wear on the front of the starter ring gear, at first I thought this was an obvious sign. Now I'm thinking it's just normal wear from the starter engaging.   Wear on the bellhousing, the only significant area of it. Or is it from me fumbling to get the gearbox on last time and this area was scratched up against the dowel that's fitted next to it.  The area where that wear is located  A continuous area of shiny metal right on the very lip of the bellhousing itself. It's hard to make out and I'm starting to think that I'm poking at shadows.  I'm starting to have doubts about this being the cause of the noise. If it is making contact around the full circumference of the flywheel then I suppose it might be capable of being that loud. The area scratched up near the starter motor housing is so shallow it can barely be felt running a feeler gauge over it. Yet the noise seems to be located primarily in that exact area of the bellhousing. I'd love to have a smoking gun of metal shavings inside the bellhousing, if there is it's so finely ground it's blended into the clutch dust.
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MRVirgin
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RE: My 1990. 20/02/11 New wheels
2012/04/11 17:13:19
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Where to from here?
The original plan was to refit the trans without the clutch and run the engine to see if the noise is still there. That'll narrow down the causes.
But if it is the flywheel expanding and rubbing against the bellhousing, this is the only cause that fits perfectly with the symptoms, then I'll file down the bellhousing and chuck it back in.
The problem is I'm not totally convinced by the evidence I've seen of the flywheel rubbing.
I wish I could figure a way to start the engine without refitting the trans!
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EssDub
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RE: My 1990. 20/02/11 New wheels
2012/04/11 18:03:51
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Jst a quick note, the flywheel has that beveled edge on it as standard, to help teh starter motor engage cleanly and to prevent it binding. I'm still all for putting the box on with only the flywheel installed to see if it's something to do with that pressure plate.
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MRVirgin
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RE: My 1990. 20/02/11 New wheels
2012/04/11 18:54:43
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Yeah that's what it's looking like it's going to be
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MR2Charlie
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RE: My 1990. 20/02/11 New wheels
2012/04/12 01:01:59
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Any change when you ran it without starter motor? Is there any change in sound when you depress the pedal and does the sound speed up in time with increase in revs?
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MRVirgin
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RE: My 1990. 20/02/11 New wheels
2012/04/12 02:53:41
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No change without starter
A very slight change of pitch when the clutch is depressed
Yes it does
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MRVirgin
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RE: My 1990. 20/02/11 New wheels
2012/04/17 08:36:24
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Well I can rule out the clutch
Damnit!
Looks like I need to hunt down something internal to the engine. In which case I have to question the condition of the rest of the internals...
Time to rebuild.
****it
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MRTurbo
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RE: My 1990. 20/02/11 New wheels
2012/04/17 09:47:21
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Damn, only 100k on that engine too?
1990 SW20 GT 3S-GTE Targa 2001 Honda CBR600F4i 
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MRVirgin
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RE: My 1990. 20/02/11 New wheels
2012/04/17 09:47:58
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MRTurbo
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RE: My 1990. 20/02/11 New wheels
2012/04/17 09:52:40
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Hrrmmmm... so it begins again. 
1990 SW20 GT 3S-GTE Targa 2001 Honda CBR600F4i
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bigh
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RE: My 1990. 20/02/11 New wheels
2012/04/17 09:55:23
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damn! that really sux!!! :(
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MRVirgin
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RE: My 1990. 20/02/11 New wheels
2012/04/17 12:48:06
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Maybe not actually.
Running it with the transmission inspection plate off makes it considerably louder.
The pitch of the sound is quite different with the clutch not fitted
It so clearly coming from the bellhousing
It's gotta be a flywheel problem... but the flywheel isn't showing any signs of rubbing!
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MRTurbo
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RE: My 1990. 20/02/11 New wheels
2012/04/17 14:56:27
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DIdn't think it was internal
Very strange. Try another flywheel? or even invest in an aftermarket/lighter one?
1990 SW20 GT 3S-GTE Targa 2001 Honda CBR600F4i
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bigh
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RE: My 1990. 20/02/11 New wheels
2012/04/17 15:17:13
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yep agreed, repairs = upgrades in my book (most of the time)
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MRVirgin
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RE: My 1990. 20/02/11 New wheels
2012/04/17 15:19:59
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Looking at $600 for an after market flywheel. What's to say that I won't experience the same problem with another flywheel? If only 3vz/1mz flywheels weren't so hard to find
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