Forum

[Leon Novello]

< I'll keep it quiet in case it hears and finds something else to go wrong.>
Don`t let the pistons hear about this.

[simon]

I had the same problem with my bonded quill seal so I made it a new one out of cork. Checked it a couple of times in the last 18 months and its been perfect. Always amuses me when a natural product out performs a modern man made one.

[scotty]

Hi we had a quill seal go on an iron barrel shortly after a rebuild, hole chewed out to twice the size on new main bearings quill bolt was suspect and replaced think the thin pipe that goes into seal was out of true, be interesting to check one in a lathe to see how true it is if all true should last for ages.

[Creaky45]

Simon, The cork sounds good as long as bits of it don't break off and get stuck in oil-ways. What type of cork did you use? Scotty, Good point. I will check it for trueness. The rubber I used was about 5mm thick (long) but when I screwed the quill bolt in I could not feel it was pressing into the worm nut so I sliced about 2mm of my old one and put it on the bolt as a spacer to make up the distance. Then when I screwed in the quill bolt the last few threads had some resistance as the rubber squashed up tight and I think that has done the trick.

[scotty]

Hi Creaky most gasket kits I have bought recently have a neoprene cork included about10 to 12 mm long and tapered lube with oil and shove it in timing shaft dont go all the way in when fully home about 2mm protrudes this seals on the base of the quill stem, never had much faith in cork seals ok if you got a good bit of cork.

[Bullet Whisperer]

As mentioned above, I have no problem with the original cork seals and I have just fitted one in a replacement worm nut on the 350 racer. This engine does 9500 rpm flat out and I am not worried that I have a cork seal in the end of the crank. The cork crank seal on the drive side of Redditch engines is pretty crap, though.

[Charlie]

I fitted a lip seal on the drive side of my 51 G2, had to shave a little off the sprocket to make space.

[Bullet Whisperer]

Hi Charlie, yes it is a good modification and makes the engine breathing system work much better. I have done a few by removing the circular lip which locates the steel washer and cork seal and fitting Norton Commando fork seals, which are steel backed, making a good press in fit. I didn't have to modify the [spline type] sprockets, but had to slim down the spacer inboard of it a little, so as not to be too tight a fit in the seal. Regards, Paul.