[cs80]

In the process of doing a triple bypass on my '80 CX500C, I found that the water pump mechanical seal hole was a few thousandths of an inch too small for the currently available seal, so (per forum advice) I took the rear casing in to a machine shop and showed them exactly what I needed- the bore hole bored out to the weep hole from the water pump side.

I just went to the shop to pick it up and found that the machining had been done by a different guy than the one I had talked to, and that he had reamed out the inside, not the outside part, and helpfully press-fit the $45 mechanical seal I provided for size reference. (if the other seal is anything to go by, the seal will get ruined when I have to pull it.)

How screwed am I?

 

[fogelsvillejoe]

Covers are pretty available. Look on ebay. where you at?
just saw 2 for 20 and another at 25 obo
not too screwed

 

[cs80]

New England. I've already been looking at the options on eBay. Is my current case no good now? I don't want to ruin my relationship with the shop, but if I can't use the current cover I'm going to have to ask them to buy a new one.

 

[Randall-in-Mpls]

They should be able to sleeve it for you. Otherwise, find an oil seal with the increased OD.


R

 

[cs80]

Will the proper seal with some sealant on the edge do? I'm not too certain about finding a non-standard rubber seal with the exact right dimensions online.

 

[murrayf]

i would have themm buy a new cover and a new seal and start all over again

there is no procedure for sleeving the rear case and aluminum grow much more that the thin steel sleeve would so it may come loose hot or???who knows

they cant sleeve it for what you can buy one

and if the pressed the new mech seal in they wont get it out as easy

sorry but make them do it right !

 

[cs80]

If I were to buy a seal, are all rear cases created equal, or do they differ between years apart from the seal size?

 

[thackney]

The seal size changed somewhere in the 81-82 range. '81 could be small or large, '82 is large. All seals available are large. You may luck out and get a rear cover that is correctly sized for the new seal.

 

[murrayf]

ypu will need to find a case off a 1981 cdi engine and even at that it may not be the right size for the new seal

 

[CXPHREAK]

I had a motor delivered to me in pieces a number of years back that this had happened to. The seal will be a light sliding fit, - not a press in one. I stuck the oilseal in with aviation permatex. The bike is still in use and has done a number of rallies in that time and covered a fair few miles.

But I would get the machine shop to cover their own mistake.