MTFCA Forum

I purchased the new style timer seal. Lubed the rubber portion and installed it. The seal just pushed on. I didn't need to tap it at all. The seal spins with the cam. Anyone else run into this problem. Should I just use the felt seal? Also, I purchased a new brass plate that goes over the seal, I know the new seal doesn't use it, but the hole in the center appears too small. It goes over the threaded portion on the front of the crank, but not over the crank snout like the seal. It wobbles, and doesn't sit flush with the cover. I didn't see any options for the plate. Is it just manufactured wrong or is it me? Got it from Lang's...3222. I thought I was going to make progress today, but no such luck. Thanks for input. 23 T.

The seal needs to be shimmed around its perimeter to get a tight fit. I only use the modern seal because I use an E-Timer, otherwise the felt seal seal is fine with mechanical timers.

I don't bother with the vendors seals for that very reason, I buy mine from our local bearing supplier and fit just fine.

Perhaps your front plate hole is large, but that could be cured with adding some sealant to the rim of the modern seal. Or if needed, shim and seal.

All the times I've used the modern seal it has to be tapped into place. Sealant around the metal rim helps too. Wouldn't use the old time felt and brass shield, that repro shield isn't made well anymore, used to fit, but for several years the rim dia. and the inner dia. are off. Modern seal is a big improvement.

Here's a link from a few years back.
http://www.mtfca.com/discus/messages/82 ... 1515271790
I remember, about 7 years ago, turning the end of a shaft and using it to expand the can of the seal a little so it pressed in snug. I think there was a little trial an error involved to get a good fit. I used a little sealant also for the best results.
Bill Coyle

Tommy, Could be your seal size but also there were differences in the front plates. You can still probably use that seal but give the outer edge a little tweak with a needle nose to enlarge it. When you then install it add a bit of Ultra Black gasket sealer. Let it sit and cure. Your seal will be fine as long as you didn't damage the inside. You don't want that seal to spin..

While you have the front of the engine open this is a perfect time to also install a modern seal on your Crankshaft!! You can simply install one on the outside using that super Ultra Black stuff! There is lots of info and pictures available but with this seal you'll not have any oil dripping from the front of your engine.
I believe most guys say that you should remove that brass shield to prevent it from shorting out since you have a modern seal?

Good Luck

Here is the difference in the brass shield.

Modern seals do often deem loose in the housing. I resort to fitting them with a ring of brass shim and RTV to make a good fit. Distorting the seal can make for further difficulties. Using pliers to open up the metal edge of the seal makes it far more difficult to fit. You are left trying to fit the larger size into the register, and the taper you have made works against you, unless you fit the seal inside out!

Allan from down under.

Allan, That's a Very good idea and your right if the flange is tapered outward the seal may be difficult to keep in.

I prefer to use the proper sized seal but in this case the Ultra Black would hold the seal properly with out any mods to the flange.
IMHO
Thanks for your idea

Thanks for all the ideas..Guess I got some decidin to do. I do plan on upgrading the crank seal also. Thanks again. Tommy
I think I just found a use for my unwound magneto coils! Shims...

ULTRA-BLACK