My crankshaft came back from the machine shop with pits in the nose where the front main seal goes. I had hoped to use a modern seal here and with these pits it did not seem like it was likely to make an oil tight assembly. I wasn't even sure the old felt or a rope seal would work. Here is what it looks like:
On another thread someone suggested trying Lang's for a sleeve. Sure enough, they had it and sent it out PDQ. The sleeve is SKF Speedi-Sleeve no. 99118. It came with an installation tool which was WAY too short to use so we cobbled up something out of plastic pipe and an old hose clamp. The sleeve itself is very narrow and needs to be installed up from the timing gear to make sure the surface will be where the seal lip is working. The sleeve needed to be driven on over the snout but got loose as it went down where the pits were. This was not going work as a press fit! After a good clean with brake cleaner the area was saturated with red locktite and the sleeve slid into place. The installation lip on the sleeve is now too high to clear the timing case and will have to be removed:
The next day I masked the area and had at it with hacksaw & needle nosed pliers. That metal is tough and the lip came loose in chunks looking very untidy. I had at it with a small file but ultimately decided that I risked more damage to the sleeve seal surface than I stood to gain with the clean up.
Also, the sleeve came loose while prying and had to be rebonded. Seeing the lower surface was rough I lowered the sleeve slightly to get just a little more clearance between the rough edge and the seal lip. A day later it feels good and solid. Here is what it looks like now:
Even though the sleeve seems to be well bonded right now, I do have some concern that under stress & vibration it may come adrift in service. The only other solution I can think of is to cut the sleeve off with a Dremel and clean the area up again to use JB Weld to fill the pits and then sand/polish the shaft as well as I can. This ought to allow the use of the stock felt seal.
Vintage Paul, the road forward never seems straight with this project . . .
Hmmm, it was harder than it should have been. I pushed mine on (the supplied tool was only good to get it started on the shaft) and then did a quick twist on the lip with a pliers and it peeled off nice and cleanly. Like yours, mine was not going to be a nice friction fit so I used the green Loktite "Sleeve Locker".
Don't worry Paul, As I advised you before you can always install a oil seal on the outside to fix your oil leak. The surface where this seal would run looks good.
I personally would use the model A rope seal, it does a much better job than the felt. There is no oil pressure on the front seal (or any other part) I don't think you would have that much of an issue there. With a rope seal you are covering a much wider surface too. The felt is nothing more than a wick. Just my 02. KB
Walt - As I understand the Green, it "wicks" into tight spots and might be perfect for adding some re-enforcement to this sleeve. Yours has been stable?
Gene - I'll keep your external seal idea in my back pocket should this one prove leaky for whatever reason.
Keith - You are probably right about the felt being a wick. If it is slow enough it will not matter but with the pits in my crank I just wasn't sure the felt would survive.
Mine has been stable, I've had it in for several years and probably 5,000 to 6,000 miles.
I had to pull the pan to fix a leak in the front dam that I'd initially blamed on the seal but the seal and sleeve were fine.
Thanks Walt, I'm thinking I'm going to get some of the green to add to the joint just in case. Its easy to do now and might just make a difference.