Crank Bearing Damaged, Crank Replacement?

[Cassius086]

Treat the ole girl right....bite the bullet, split the cases, and do whatever is neccessary before any more serious damage occurs! She will thank you for it in the long run.:-D

[j_fitz7]

Thanks for the advice I needed to hear it!

Im going to split the cases. What else should i check out while i am in there?

Replace piston rings, replace gaslets and o-rings, examine oil pump, cam chain, sliders and valve heads and seats as a minimum?

[Dave8338]

I've been thinking more about the situation. The only real damage i can see is to the sleve that cradles the balls in the races.

I have been considering sealing everything up and trying to run it as is. I would change the oil right away to collect the metal shavings and monitor the engine for the sounds and vibrations which might indiacte the crank bearing is damaged.


Can I get anyone on the GSResources to agree with this plan, or does it seem too risky? Why?

Thanks.

IT WON'T LAST, and what part of that motor do you want impaled in your leg(s) when it does let go? :shock:

[j_fitz7]

Anyone think that this bearing could be replaced by just dropping the bottom half of the case off and swapping out the bearing by pulling the pistons down in the bores?

I just talked to a local guy mechanic who said he would try that first and proceed with the full rebuild if that was not secuessful.

[t3rmin]

Anyone think that this bearing could be replaced by just dropping the bottom half of the case off and swapping out the bearing by pulling the pistons down in the bores?

I just talked to a local guy mechanic who said he would try that first and proceed with the full rebuild if that was not secuessful.

That's what I was thinking. Motor upside-down, bottom case-half off, pull off the cam chain tensioner and you might have enough slack to get a puller on that bearing...?

[Hap Call]

Anyone think that this bearing could be replaced by just dropping the bottom half of the case off and swapping out the bearing by pulling the pistons down in the bores?

I just talked to a local guy mechanic who said he would try that first and proceed with the full rebuild if that was not secuessful.

I've done that, but instead of a crank bearing, I replaced a transmission on my 1100E. It can be done but it is a bit of a pain. You might consider a good rebuild to inspect everything...it would add the cost of a top end gasket set (maybe the cam chain guides if they are in bad shape and a cam chain) and about 5 hours to the process but you would have peace of mind when you finished.

Hap

[renobruce]

If you plan on replacing that bearing, you'd better order it now. I ordered the same bearing 4 weeks ago for my project and it just showed up. I was told they were out of stock in the U.S. Mine came from Japan.:shock:

[j_fitz7]

thanks for the tip i ordered the bearing,

For the gaskets and o rings needed for a complete rebuild, can someone reccomend a complete set by an aftermarket manufacturer? or should I order the OEM parts?

this kit by athena has 66 pieces, i dont have a clue what they all are?

http://www.oldbikebarn.com/part.php?id=682&subcategory=Gasket%20Sets&bike=GS1000&DisplayPerPage=100