Well, it happened, the layshaft bearing on my MKIII bit the dust. I don't
know if it was the original bearing or not, it was stamped in three spots,
1) FAG; 2) 6203, and 3) A P. Could this be the Portugal bearing?
What I found was that the cage was almost completely gone, I found two tiny remnants of the
cage in the bottom of the case. Inner race came out with the layshaft, and was a very tight fit.
Eight (8) ball bearings fell to the bottom of the case, when I removed the layshaft.
The outer race stayed partially in the case, but could be removed by hand without
heat.
The new bearing (FAG 6203TB/C3) is a firm push fit into the bore, once again without
heat. After reading through all the layshaft bearing threads I could find, I believe the interference fit is
not as tight as it should be. So, I've decided to use a smear of JB Weld to hold it in place, as recommended
by hobot and Comnoz in various threads.
I guess my first and main questions for now would be…
1) Should I scuff the bore and outer race to give the JB Weld a better surface to grip on?
2) Should I just use a thin smear of JBW or a slightly thicker layer to fill the gap when I heat the case?
3) Should I even use heat, or just push it in by hand?
know if it was the original bearing or not, it was stamped in three spots,
1) FAG; 2) 6203, and 3) A P. Could this be the Portugal bearing?
What I found was that the cage was almost completely gone, I found two tiny remnants of the
cage in the bottom of the case. Inner race came out with the layshaft, and was a very tight fit.
Eight (8) ball bearings fell to the bottom of the case, when I removed the layshaft.
The outer race stayed partially in the case, but could be removed by hand without
heat.
The new bearing (FAG 6203TB/C3) is a firm push fit into the bore, once again without
heat. After reading through all the layshaft bearing threads I could find, I believe the interference fit is
not as tight as it should be. So, I've decided to use a smear of JB Weld to hold it in place, as recommended
by hobot and Comnoz in various threads.
hobot said:While on subject I've yet to hear a single success story of any type loctite holding a bush or bearing stable, nuts and fasterners yes, me too, but not in tranny or engines, ever. Jim Comstock verified my idea to use |JBWeld in loose bores.
Hi heat OVER 500' F will soften it to cold honey state. Al don't loose its intergrity till close to 1000 F and nil distortion if whole case heated instead of just spots.
comnoz said:I think if it was mine I would use a very light layer of JB weld in the bore before you push the bearing in. Will not likely give any trouble. Jim
I guess my first and main questions for now would be…
1) Should I scuff the bore and outer race to give the JB Weld a better surface to grip on?
2) Should I just use a thin smear of JBW or a slightly thicker layer to fill the gap when I heat the case?
3) Should I even use heat, or just push it in by hand?