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Bang! (loctite of the ages II)
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<blockquote data-quote="oexing" data-source="post: 125077" data-attributes="member: 1493"><p>Hmmm, if the taper was below 5 degrees this could be the flaw in the design . As I said elsewhere the old guys from long time ago did not always decide on best practise, either due to company politics or any other mistakes made. I´d say the 5/16 bolt holes were plain wrong and too weak in combination with less than 5 degrees tapers for a puller plus hammer blow on that. A torch on components for regular disassembly would be proof of faulty design. Never had to save my day on BMW cranks for decades by using a welding torch, the seal behind the flywheel wrecked by this for sure. At this place there should be some securing part like tab washers under bolts or nuts of the crank - after a good heave on the wrench certainly. You´d lap the taper of the flywheel on the crank in case of questionable finishes there. There are lots of engines with that sort of taper joints, just the Vincenteers not so used to them it seems. But certainly this is a question of suitable pullers to use and designs to go with them which do work reliably. </p><p></p><p> Vic</p></blockquote><p></p>
[QUOTE="oexing, post: 125077, member: 1493"] Hmmm, if the taper was below 5 degrees this could be the flaw in the design . As I said elsewhere the old guys from long time ago did not always decide on best practise, either due to company politics or any other mistakes made. I´d say the 5/16 bolt holes were plain wrong and too weak in combination with less than 5 degrees tapers for a puller plus hammer blow on that. A torch on components for regular disassembly would be proof of faulty design. Never had to save my day on BMW cranks for decades by using a welding torch, the seal behind the flywheel wrecked by this for sure. At this place there should be some securing part like tab washers under bolts or nuts of the crank - after a good heave on the wrench certainly. You´d lap the taper of the flywheel on the crank in case of questionable finishes there. There are lots of engines with that sort of taper joints, just the Vincenteers not so used to them it seems. But certainly this is a question of suitable pullers to use and designs to go with them which do work reliably. Vic [/QUOTE]
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