Gord
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Posts: 233
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Post by Gord on Jan 18, 2021 21:39:23 GMT 1
A while back I had the side covers powder coated along with the frame and other parts. I finally got to the stage where I’m having a close look at the side covers and have found they sandblasted and coated parts of them I asked them not to. I’m concerned about a few places in particular: Water pump cavity. Bearing and seal sockets for water and oil pump Oil pump gasket mating surface (has been coated) Bushing for oil pump - has some evidence of sandblasting on the inside. Not sure what to do. I haven’t tried fitting any bearings or seals yet. I worry that even if they seem to fit when off the bike they may spin when the engine heats up. Any thoughts would be appreciated. Lesson learned - next time I’m painting them myself.
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Post by 4l04ever on Jan 18, 2021 22:30:41 GMT 1
The oil pump bush can be replaced, so that is not really a problem.
The water pump gasket face still shows signs of old gasket, so probably worth cleaning up with some wet and dry on a block.
You will need to try the bearing and seals to make sure they are okay. Maybe try fitting the old ones back in just to check the fit, so you can remove them and fit the new ones if they are okay, to save wasting them if there is an issue. The seal and bearing surfaces don't look bad.
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Post by JonW on Jan 18, 2021 22:42:38 GMT 1
Im with Rob. This isnt terrible and should clean up. You can use paint stripper and / or a knife blade on the gasket surfaces (oil pump and inner face) that are covered in PC. You should also blast a bunch of WD40 up the threads to was out any loose media and then run taps into them as well. Powdercoaters have tape they use to keep the powder away from areas, they should have used that on the gasket surfaces.
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Post by Tobyjugs on Jan 18, 2021 23:12:48 GMT 1
As above think you will be ok, I used to always fit water pump and oil seals with a very soft sealant from Dow Corning. A small amount was frugally put around the outside of the seal. It was used more a lubricant to help press the seals in place than a sealer. The water pump bearing if a little loose i would use a little Loctite 648 (only if necessary). Put some sealant on the water pump gasket and it will seal, There looks like a dent on the sealing face.
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Gord
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Posts: 233
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Post by Gord on Jan 18, 2021 23:24:28 GMT 1
The oil pump bush can be replaced, so that is not really a problem. The water pump gasket face still shows signs of old gasket, so probably worth cleaning up with some wet and dry on a block. You will need to try the bearing and seals to make sure they are okay. Maybe try fitting the old ones back in just to check the fit, so you can remove them and fit the new ones if they are okay, to save wasting them if there is an issue. The seal and bearing surfaces don't look bad. Thanks for this - good idea on trying the old bearings and seals first, I'll do that and see how it goes. The gasket surface was clean when I took it in, they blasted it, taped it then cooked it with the tape on I think and it got all gummed up. I'm going to clean it up again.
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Gord
Drag-strip hero
Posts: 233
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Post by Gord on Jan 18, 2021 23:25:38 GMT 1
Im with Rob. This isnt terrible and should clean up. You can use paint stripper and / or a knife blade on the gasket surfaces (oil pump and inner face) that are covered in PC. You should also blast a bunch of WD40 up the threads to was out any loose media and then run taps into them as well. Powdercoaters have tape they use to keep the powder away from areas, they should have used that on the gasket surfaces. Thanks.....I didn't realize paint remover would take off powercoat - I'll try that too.
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Post by JonW on Jan 19, 2021 1:18:34 GMT 1
Stripper it will do it but 'slowly' and you will need to scrape it. some comes off easier than others.
dont do the whole cover, just the bits you want to get back to alloy.
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Gord
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Posts: 233
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Post by Gord on Jan 19, 2021 3:28:20 GMT 1
Stripper it will do it but 'slowly' and you will need to scrape it. some comes off easier than others. dont do the whole cover, just the bits you want to get back to alloy. Thanks Jon - going to try that tomorrow in the shift shaft seal socket.
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Post by bare on Jan 19, 2021 18:42:52 GMT 1
There are Good reasons Not to powder coat. Now you know a couple of them .
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Gord
Drag-strip hero
Posts: 233
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Post by Gord on Jan 19, 2021 18:46:43 GMT 1
There are Good reasons Not to powder coat. Now you know a couple of them . I'm painting the next one for sure!
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Post by JonW on Jan 19, 2021 22:45:09 GMT 1
Be aware if you paint it that you get all the old paint and corrosion off. if not the paint can peel.
Ive redone by Xt500 clutch cover twice with paint already and its getting powder next time lol But then I do my own PC and have tape and time (and inclination) to make sure things are done right.
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