clacking noise until clutch depressed? - Page 3 - Alfa Romeo Bulletin Board & Forums
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post #31 of 40 (permalink) Old 09-25-2008, 07:20 AM
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Release bearing normally makes noise when you push down on the clutch pedal, not lift up.

With such low-res sounds, it's hard to know, but it offhand doesn't sound any worse than my Super, with a rebuilt trans, does in neutral.

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post #32 of 40 (permalink) Old 09-25-2008, 07:22 PM
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apologies for the low res sound... the noise has been drowned out by the exhaust note. But it is very noticable at neutral.... Transmission has just been re-built as well.

Any other possible cause of the noise? Pressure plate, clutch fork, bearing clips?
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post #33 of 40 (permalink) Old 09-26-2008, 07:33 AM
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There is this to consider too; a low idle speed makes noisy neutral even noisier. Up the idle a hair and see if the noise smooths out any.

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post #34 of 40 (permalink) Old 09-30-2008, 06:52 AM
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the noise does not seem to come from the transmission..... noise will go off immediately when clutch is press till the biting point.
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post #35 of 40 (permalink) Old 09-30-2008, 07:22 AM
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I'm afraid it seems almost comical to try to diagnose very specific noise issues on an internet bulletin board. Is there an experienced Alfa mechanic or hobbyist you can go to to diagnose in person?

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post #36 of 40 (permalink) Old 10-12-2008, 11:31 PM Thread Starter
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Just completed an engine rebuild, to include removing and replacing the driveshaft, and on my first test drive I note no more clacking or rattling.

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post #37 of 40 (permalink) Old 10-13-2008, 12:32 AM
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Here's an idea...

If your transmission has hydraulic lines and a slave cylinder, could it be a missing or misplaced 'C' clip at the front end of the slave? Mine was missing the front clip and seemed to work fine. At first I thought slaves only had a single clip. I now see detents for a second clip at the front as well.

What if a missing or slipped clip causes issues in other cars?

I see you fixed the problem. Perhaps when you replaced it all, the clip was put in properly?

Vibration at a certain freq. might cause it to rattle until engaged, in other words pressed between the housing and fork?

my .02 cents

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Last edited by SpiderWebb; 10-13-2008 at 12:34 AM. Reason: typo
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post #38 of 40 (permalink) Old 10-13-2008, 02:40 PM Thread Starter
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Hey, good idea, but alas, no slave cylinder C Clip in a transaxle Alfa. Not sure if my fresh and equal compression as a result of the rebuild, or the driveshaft removal and reinstallation did the trick, but it's still early, I'll drive it a while and see.

Jim
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post #39 of 40 (permalink) Old 10-13-2008, 05:31 PM
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Quote:
Originally Posted by SpiderWebb View Post
Here's an idea...

If your transmission has hydraulic lines and a slave cylinder, could it be a missing or misplaced 'C' clip at the front end of the slave? Mine was missing the front clip and seemed to work fine. At first I thought slaves only had a single clip. I now see detents for a second clip at the front as well.

What if a missing or slipped clip causes issues in other cars?

I see you fixed the problem. Perhaps when you replaced it all, the clip was put in properly?

Vibration at a certain freq. might cause it to rattle until engaged, in other words pressed between the housing and fork?

my .02 cents
OMG.... Just found out from my mechanic that he reassembled everything back without the clips... because it was not there in the first place.
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post #40 of 40 (permalink) Old 10-14-2008, 08:14 AM
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Only one of the C-clips really matters in terms of function: the one closest to the TO bearing arm. That is, the one at the pushrod end of the cylinder.

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