Engine seals better ones

Has anyone come up with a brand and PN for double lipped seals?
These would be an ideal item to replace the front and rear crank shaft seals.

I just ordered a rear main seal from Advance auto yesterday, didnt know there was a better one, dangit. It was 6.50 or some such amount.

I think Jim was reading next post down (differential fill) and Bob mentioned axle seals w/dbl lip. A specialty product. But apparently somebody has them for the rear axle.
Rob

So, knowone knows of an improved rear main seal for the 1800 engine?

What causes the normal seals to leak so easily? I've got one sitting around waiting to be installed and it looks like a pretty decent seal.

If I can get the seal dimensions (usually molded right into the seal face itself) ~ ID, OD, and width/thickness (usually listed in that order), I or someone else can take look through some of the seal catalogs for some double lipped alternatives. If anyone comes up with some alternatives, Please post as we all can benefit. Thanks! :)

http://www.afmusa.com/index.html

http://www.harwal.com/

http://www.ahpseals.com/products/high_perf.php

and, http://tinyurl.com/2fclhc

There are definitely supposed to be uprated rear main seals available. I haven't tried any of them (but would sure like to). Octarine in the UK lists

http://www.octarine-services.co.uk/parts_shop.htm

(see LUF10002).

NAPA (in the USA) apparently has an uprated seal from Chicago Rawhide. It has part number 415442.

I forgot to add the photo below to guide those looking for the seal dimensions I mentioned above. Hopefully you can see the numbers molded into the rubber jacket across the top of the seal in this photo.

The double lipped seals come in a variety of lip configurations and purposes. Some are true pressure seals and both lips are intended to control fluids only. Others have a second lip which serves more to control outside contaminants than inner fluids. Some single and double lipped seals are even configured in a "wave" pattern to move contaminants AND fluids back away from the lip's path as the shaft rotates, in an attempt to minimize the shaft wear that Terry mentions.

The first number from County I posted above came from Chris at Octarine Services and his listings will be interesting to research, just to see what configuration they are. FYI

Why does that picture look just like the grease seal on the inside of the front hubs?

Because, it is actually the rear axle hubs oil seal. I showed it just to demonstrate where and how many bearing seals have their dimensions molded into the outer rubber jacket.

ingoldsb Wrote:

Don't know what this is worth...probably not much. Way back when I did the engine in my car now, I had a substancial leak at the rear main. I was buying them from TRF. Pulled the engine & installed another one from TRF figureing I screwed up the install. They were red in color. Same leak. I got one from Moss which was black in color. Hasn't leaked since. To look at them, they seemed identical other than the color. Nothing against TRF as I love them dearly. My theory was they may have sourced thiers by size or numbers..whatever but they leaked like a sieve. If you look at these seals, not only is there the size but some are directional. There are grooves moulded in besides the main sealing lip to aid in pushing the oil back as the crank rotates. I can't verify and it's only speculation but I have often wondered if the bad ones I got were not for the opposite rotation? Between the oil leak issue and my clutch/OD problem, I became quite the expert at R&RI the engine! :)

Bumping this back to the top because I have measurements.

I've got new Moss seals sitting in front of me. The rear oil seal says 88.9-104.8-9.5 and the front timing cover seal says 1.562-2.312-0.375.

Posted by: ingoldsb (75.153.150.---)
Date: March 24, 2008 12:51PM


NAPA (in the USA) apparently has an uprated seal from Chicago Rawhide. It has part number 415442
---------------------------------------

Thats a National # and not a CR # ...the CR # is 33645

shaft = 3.375 bore= 4.125 width .375 single lip w/ garter spring. Nitrile matl.

----------
--------------
metric= shaft= 85.725 bore= 104.775 w= 9.525

and.......

Posted by: NitroRustlerDriver (208.100.145.---)
Date: April 2, 2008 11:36AM


I've got new Moss seals sitting in front of me. The rear oil seal says 88.9-104.8-9.5 and the front timing cover seal says 1.562-2.312-0.375.....


so we have some discrepancy here in size from the above seal....

so lets see what the catalogs say to use for a B rear main seal. .....

CR nor National show zip for the B rms.

So lets then ASSUME the dimensions are right on the "Moss' seal. There is no US marketed seal with those dimensions, close comes the 33645 which will give 3,2mm more tension on the shaft.....which is about .125" which is a lot of distortion. There will be, I think, too much heat buildup on the lip.

Going back to that single lip 33645 above, there is another same size with a dual lip, which is CR part number 34647. The main lip on that one is Viton ...which is good for an additional 50*F.

BUTTTTT.....that .125" additional crush would bother me too much....... if there was a wear groove, a Speedy sleeve and the Moss part should work fine.

BTW..the first dimension is the shaft size or diameter of the part your trying to seal with the lip of the seal. A crush dimension is always included. Eg.....1.000" bore is 1 inch and the seal i.d. might be .987" or so at rest.

Hope this helps someone.

Well, the NAPA one has a smaller ID, explaining why it seals better.

I might have to swing by and get one for comparison reasons.

So, I found a few things out. Here is a cross reference for the seal:

http://www2.chicago-rawhide.com/popup_parts_lookup_457012.htm

Looks like part #33645 for standard (as stated above) and 34647 for long life. These were cross referenced from the 415442 number.

Called NAPA, they can get one for me (from Kentucky), but accourding to their system it is discontinued. That one was ~$25 + freight, which he said was at least $10. Schucks (PartsAmerica) can get them but they are ~$55.

So it looks like they are hard to find.