check timing bush

[Angus]

Some time ago (4 year 3000 miles) the 1960 A10 had clutch problems and I found the cush nut loose and thought I felt some end float (did not measure). Anyway yesterday I opened the timing side for the first time as the engine was a bit noisy and found the dynamo chain dry and loose. I thought I would check for play in the timing bush Musky style so tried to find his post about doing this but failed. From memory I believe he said leaver the end of the crank with the front nut on the oil pump, I did this with a longish screw driver and felt nothing. I did not put lots of pressure on, so I am hoping this is an adequate check and good news.

[muskrat]

G'day Angus.
I use a dial gauge with a magnetic base. Attach to the cylinder block, may require ties to secure properly. Put pointer on the top face of the nut and use a screwdriver between the pump and  under the nut. May take a few wiggles to expel any oil in there first and a push down and take the reading on the push up. Mine had 8 thou"  . Not bad for 35 years of abuse (with a few race meetings). Still running OK with 40/70 oil.
Cheers

[stev60]

This probably wont be approved of but I drilled and tapped a 5mm hole above the dynamo chain and fitted a countersunk screw, hardly noticeable and makes it easy to give the chain a squirt of chain lube, the previous times I had the cover off the grease appeared to lose contact with the chain, maybe it was the grade of grease 

[duTch]

 

...... drilled and tapped a 5mm hole ........

       

 The rivet counters'll get yea....should've done it in Whitworth   

[Angus]

Thanks Musky, I have put it back together now and now and no noticeable noise in bottom end. Would I have noticed/felt any movement, like I did the end float on the other end.

[bsa-bill]

the previous times I had the cover off the grease appeared to lose contact with the chain, maybe it was the grade of grease 

Cold engine - yes,
don't use high melting point grease, then when the engine is running and hot; grease will get to the chain
Better still IMO fit a belt drive

[muskrat]

G'day Angus.
I doubt you would feel/see a couple of thou". I certainly can at 8 but there is no discernible noise (at the moment).
Cheers

[Angus]

Thanks again Musky  . I could not feel anything so good to go for the rest of the year  . I will check again in the winter although that is what I said last year and the year before that. She is a lot quieter with the dynamo chain adjusted to 1/4 inch play and grease in there, I can here the top end now  .

[Butch (cb)]

This probably wont be approved of but I drilled and tapped a 5mm hole above the dynamo chain and fitted a countersunk screw, hardly noticeable and makes it easy to give the chain a squirt of chain lube, the previous times I had the cover off the grease appeared to lose contact with the chain, maybe it was the grade of grease

Eureka. Shows how much attention I pay to these things. My timing case has a cap head screw sitting at pretty much that point. I always wondered why some damned fool PO would have done that.

Now I really had better get me coat.