Tappety Noise

I use a 4 foot length of cut garden hose as a stethoscope. One end at my ear, then probe around with other end until noise source is found!
Dennis
 
Hi again,

I'm not making much progress...
The primary chain was a bit loose, tightened that, and removed the locking tabs for the exhaust nuts, which were rattling.
I've tried to capture the noise on video, not sure if that helps...

 
franko said:
A rotor coming loose of its center can also give a similar sound. I've had a couple of them. First one took a long time to figure out. A mechanics stethoscope would help isolate where the noise is coming from. Me, I just use a piece of tubing.
Click to expand...
Rotor as in the alternator?

Cheers

Esben
 
Fastback-DE said:
Rotor as in the alternator?

Cheers

Esben
Click to expand...
Have a look at this thread ( there are others too). But there were a bad batch of Lucas rotors, so definitely worth checking yours. The ones in question are stamped 54212006.

N

Post in thread 'Lucas Alternator rotors'

The old type (numbered .......2006) with pressed-in centre tends to explode due to the loosening centre. The later type (numbered …….2298) has a welded-in centre and will not explode. Check this out before you refit the existing Lucas rotor to prevent severe damage!
  • nortonspeed
 
Fastback-DE said:
I've just ordered one!

Thanks for all the suggestions guys!

Esben
Click to expand...
Excellent!

The sounds they pick up are amazing, you will be amazed how well you can pinpoint where noises are originating from.

You might also be a little alarmed at first, it can kinda sound like the internals are hell bent on destroying each other initially, but you’ll quickly learn to tell the difference between ‘normal’ and ‘abnormal’ horrid noises !!
 
Fast Eddie said:
Excellent!

The sounds they pick up are amazing, you will be amazed how well you can pinpoint where noises are originating from.

You might also be a little alarmed at first, it can kinda sound like the internals are hell bent on destroying each other initially, but you’ll quickly learn to tell the difference between ‘normal’ and ‘abnormal’ horrid noises !!
Click to expand...
Especially on a 961 !:eek::eek::eek:
 
The Fiat 124 was a 5 speed double overhead cam which was quite something for its day. It had a timing belt, not chain, that needed changing. Two barrel Weber and cruise control consisting of a knob on the dashboard that was a throttle cable. One pulled it out and twisted the knob to lock it! I added an electronic ignition which was a new thing in that day.
 
cliffa said:
Have a look at this thread ( there are others too). But there were a bad batch of Lucas rotors, so definitely worth checking yours. The ones in question are stamped 54212006.

N

Post in thread 'Lucas Alternator rotors'

The old type (numbered .......2006) with pressed-in centre tends to explode due to the loosening centre. The later type (numbered …….2298) has a welded-in centre and will not explode. Check this out before you refit the existing Lucas rotor to prevent severe damage!
  • nortonspeed
Click to expand...
I've got the one with 2 timing marks, but I'll have a closer look and listen on Wednesday.
 

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