Crankcase Gasket Sealers/Eliminators

[bcmktg]

In preparing to do some porting experimentation on a cheap old Craftsman 2.0, I began looking around for, among other things, a good quality crankcase sealant that was readily available in my neck of the woods. Since none of the threads I read covered the subject quite like I wanted, I decided to share the results with everyone else. After doing some internet research in my spare time, I came up with the following results as being recommended by some pretty heavy-duty automotive sources:

Threebond 1104 (same as Yamabond 4) One of the most highly recommended.
http://www.threebond.com/aftermarket.htm Beltco seems to have a good selection of Threebond products as well as several other adhesives and sealants, etc. http://www.beltco.com.my/catalog/THREEBOND/

Loctite 515, 518, (specified by Lawn Boy for sealing crankcases), and 510, Anaerobic Gasket Sealers.
http://www.loctite.com/int_henkel/loctite_us/index.cfm?&pageid=19&layout=3

MotoSeal® 1 Ultimate Gasket Maker Grey
http://www.permatex.com/products/au...ker/MotoSeal_1_Ultimate_Gasket_Maker_Grey.htm

Dirko HT (recommended by BMW for sealing crankcases on cars and motorcycles) and Curil 2 (both Elring products) http://www.reycomotor.com/Reyco/Elrings2.htm

Here’s an interesting page full of useful seat-of-the-pants information on sealants and automotive chemicals: http://home.earthlink.net/~motorstuff/tools05.html

Hope this helps someone along the way. I will try to do the same with other aspects of the project, if I think it may be subject material that would be of interest to others.

Al

 

[Dok]

Thanks for sharing!
Brad

 

[Tzed250]

Yamabond

I have used many tubes of Yamabond and I have always been happy with the results.

 

[starsailor]

Thanks for doing the homework...

Thanks a bunch for posting this. I was just trying to fix my brother's saw which turned out to be a blown seal between the 2 crankcase halves causing it to suck in bar oil into the intake stream. Boy did that make a mess coming out the exhaust. It's a Poulan 2300 CVA that I had to buy him to keep him from rocking my chains or running my saw with crappy gas and little oil. Anyway I had just pulled it all apart, cleaned it up, and was starting to look for the right stuff to replace the gasketless seal when I found your post. I'm going to give MotoSeal a try as it was readily available in my local autoparts shop. I'll post again with the results.

Thanks again for finding the right kinds of sealer!

 

[starsailor]

MotoSeal works well.

Well, a couple of week late, but after fixing up my brother's saw and letting him run it thru some 8-10 inch white pine storm knock downs, I have to say that the MotoSeal as a split crankcase sealer is holding up very well. Saw is running great with no indication of an air leak, like leaning out, and no more messing on itself, like it was when it was leaking bar into the crankcase. I'd use MotoSeal in a heartbeat again to seal up a split crankcase.

 

[mattinky]

You can't beat Yamabond. I've been using it to seal crankcases on dirt bikes for years, Threebond is just as good. I've been told that Yamaha has stopped making Yamabond but I can't say if this is true or not. I've got a few tubes ratholed for future use.....