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British Bikes / Re: Panther M100 engine with rust frozen bearings
« Last post by john.k on Today at 01:50:39 AM »Im going to set it aside for a while and think about it....dont want to break it.
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British Bikes / Re: Panther M100 engine with rust frozen bearings
« Last post by chaterlea25 on December 03, 2022, 10:21:59 PM » Hi All
I had a similar job when I found the original bottom end that came from the factory in my Ariel HT5
It had been sitting for donkeys years outdoors with the cases full of water
After letting it soak for a year in a bucket of diesel it was still solid
As Leon has suggested I set the cases up on the mill table and bored out the timing side mainshaft until it releases the timing side bearing, then I was able to split the cases.
I undid the big end on the TS and removed the TS flywheel then the drive side wheel
As there is a circlip between the drive side case bearings it would wreck the case if the shaft was pushed inwards so I pressed the shaft outwards as there is a collar that supports the bearing inner race
I would resist using the gas axe as the cases maybe damaged around the bearing housing
John
I had a similar job when I found the original bottom end that came from the factory in my Ariel HT5
It had been sitting for donkeys years outdoors with the cases full of water
After letting it soak for a year in a bucket of diesel it was still solid
As Leon has suggested I set the cases up on the mill table and bored out the timing side mainshaft until it releases the timing side bearing, then I was able to split the cases.
I undid the big end on the TS and removed the TS flywheel then the drive side wheel
As there is a circlip between the drive side case bearings it would wreck the case if the shaft was pushed inwards so I pressed the shaft outwards as there is a collar that supports the bearing inner race
I would resist using the gas axe as the cases maybe damaged around the bearing housing
John
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British Bikes / Re: Panther M100 head issues
« Last post by Rex on December 03, 2022, 01:49:08 PM »Someone was offering one free in the club mag a few months back.
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British Bikes / Re: Panther M100 head issues
« Last post by john.k on December 03, 2022, 09:26:43 AM »heads are so hard to find ,the POC offers a new made one ........havent seen a recent price ,but even in Yorkshire ,prices have gone up somewhat.
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British Bikes / Re: Panther M100 engine with rust frozen bearings
« Last post by john.k on December 03, 2022, 09:24:42 AM »I plan to blow the shafts with the oxy if I cant get the cases apart.......I have several motors as spares ,including a 1936 with aforementioned busted crankcases .......I also have a 1930 600cc.......and have been offering to swap the whole motor for a set of later cases.........plenty of wants it,but none offering swaps
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British Bikes / Re: Panther M100 engine with rust frozen bearings
« Last post by cardan on December 03, 2022, 09:13:35 AM »OK. Don't do it.
I'm not sure how hard the main shafts are, but they are probably case hardened and "soft" in the middle. Set the engine up somehow (spend some time getting it level and supported) and drill them out, step by step, until they are effectively gone all the way through the bearings. HSS drills should be OK, but the coated ones are better, and solid carbide is expensive but will work well.
Crankcases are hard to find and valuable, while the mainshafts can be remade or bought.
Leon
I'm not sure how hard the main shafts are, but they are probably case hardened and "soft" in the middle. Set the engine up somehow (spend some time getting it level and supported) and drill them out, step by step, until they are effectively gone all the way through the bearings. HSS drills should be OK, but the coated ones are better, and solid carbide is expensive but will work well.
Crankcases are hard to find and valuable, while the mainshafts can be remade or bought.
Leon
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British Bikes / Re: Panther M100 head issues
« Last post by Rex on December 03, 2022, 09:12:19 AM »And archaic in design too. Surely any car/bike machine shop offering head repairs could turn up a new seat and insert it properly? Not exactly hi-tech repairs.
Cheapest option...buy another head. Unleaded valve seats was another "end of the world as we know it" scenario from some years back, though in reality nothing was ever going to cause the solid lump of Yorkshire cast-iron Panther head any problems fuel-wise.
Cheapest option...buy another head. Unleaded valve seats was another "end of the world as we know it" scenario from some years back, though in reality nothing was ever going to cause the solid lump of Yorkshire cast-iron Panther head any problems fuel-wise.
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British Bikes / Re: Panther M100 engine with rust frozen bearings
« Last post by Rex on December 03, 2022, 09:06:22 AM »For a more informed range of opinions specific to Panthers you could always ask on the Panther F-B group as they're well-informed and technically aware. Then there's the Panther Owners forum who are also good.
I had an M100 up to six months ago but other than the previously-mentioned heat, heat and more heat I can't offer anything more than others have already said.
I had an M100 up to six months ago but other than the previously-mentioned heat, heat and more heat I can't offer anything more than others have already said.
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British Bikes / Re: Panther M100 engine with rust frozen bearings
« Last post by john.k on December 03, 2022, 07:33:33 AM »I cant get to the bearings until cases are split..........once cases are split,there is no problem........anyhoo,I'll give heat a go tomorrow .
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British Bikes / Re: Panther M100 head issues
« Last post by john.k on December 03, 2022, 07:28:52 AM »Cast iron ,and very heavy .