Mystery noise video?

It actually sounds worse than a bad TO bearing....could be ruining the clutch also......lots of metal-to-metal contact. I would bet it has been making noises for quite a while.
 
No it doesn't sound like a throwout bearing to me. Sounds like something is fouling metal to metal.

What Engine?
What flywheel?
What transmission housing?
What size clutch?
What type of pressure plate?
Is this a freshly assembled set of parts?
Or has it been together for a long time and the noise has just started?

Give us something to work with.


Mart.
 
The engine is 1949 Mercury rebuilt last November, ****** is 1948 (also rebuilt) so yes it is a fresh assembly. I had been driving for about 45 minutes with no noise. Parked in the garage for two days went to start it and made this noise right away. When I pulled the floor I could not find the clutch pedal return spring, don't know where it went or how long it has been missing. Starting to wonder if something wasn't put back together properly. I know the flywheel was resurfaced, the ring gear was flipped over and welded on. I was told that the clutch and pressure plate were OK. Not even 200 miles since all the rebuilding.
 
Did you do the rebuild? If not discuss the issue with the builder. Sounds like you have no option but to pull the transmission and see what's going on. We can all guess at the cause of the noise, but you'll still have to open it up.
Glad it happened at home... Keep us posted with what you find.
 
Is the pedal fully depressed and if not what happens to the noise when fully depressed?
Sounds like the clutch fingers hitting.
 
A local trusted mechanic removed the engine, ****** and rear end. Engine was sent to a reputable rebuilder. I am not sure who re-installed the clutch /pressure plate, my guess is the it was the mechanic. I am taking it to him on Monday. No question that the rear will have to be dropped and the ****** pulled. I was hoping that someone at the Barn may have come across this before. I don't want to place any blame on the mechanic but I would have thought that after having everything rebuilt or told that it was OK as is, I would have a good driver and not have to pay to have it torn apart again.
 
I had a noise very similar to that on 1st start up once, with a new clutch. It was one of the rivets on the pressure plate hitting the boss for one of the trans-to-half-bell bolts. But it did it all the time (for the 10 seconds til I shut it down :eek:) Not sure how it could happen when the clutch is pushed in, unless the PP bolts are loose.
 
I did try to look at the pressure plate fingers. I know they're impossible to depress toward the clutch by hand but I did notice that there was a small amount of wiggle side to side, with one of them in particular. Not sure if that is normal?
 
I also suspect loose pressure plate. If not down tight, depressing the clutch would cause the pressure plate to back up, and there is not a lot of clearance in there.

Anybody else worried about flipping the ring gear? Isn't the side with beveled teeth edges supposed to face the back to ease engagement with the Bendix gear?
 
I watched the vid several times. The noise started the instant the throw out bearing started to turn...before it was depressed fully. The vid shows, twice, the throw out bearing moving and before there's any significant pressure on it...something starts making the noise. I'd try filming it again but moving the clutch pedal slower...creep the TO bearing slowly to the forks and see what happens. I'm not sure what's inside of these TO bearings are, if they're balls, bad balls can create a problem (quote from my wife :). My guess is that it's either the bearing or pressure plate forks out. Ease the TO bearing to the forks and see what happens.
 
Is it possible that the clutch disc was installed backwords? I've seen it happen with results similar to what you describe.
 
Nothing is said about what year the case is. Sure sounds like a 34 or earlier case with a big clutch, not enough clearance.
 
Every thing had been working properly until Thursday. No problems with clutching or shifting, no suspect noises. As I said, I have only put about 200 miles on it since the rebuild. When I last parked it in the garage everything was fine, went to start it two days later and the noise was there. After reading opinions from those who have chimed in, I have a theory. Probably not the throw out bearing, must be metal hitting metal. The last time I drove it was for about an hour, I assume that there would have been the usual operating heat in the bell housing, during the drive a bolt or bolts holding the pressure plate on the flywheel backed off a touch but because it was hot and there was some thermal expansion, there was no metal hitting metal. The car sat for two days and cooled down allowing contraction. Did a cold start and the PP was pushed back a tad when the throw bearing contacted the forks, PP now hitting a spot in the bell housing causing noise?
 
Mystery noise solved. My engine is a 1949 Merc and has a separate starter plate. The plate had come loose or warped according to my mechanic causing the flywheel to hit an edge of the plate when the clutch was engaged. Plate was straightened and re-fitted, no more aweful noise. Sure beats pulling the ****** and all that goes with it.
 
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