Stuck tappet/bucket
- Cfoux85
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Stuck tappet/bucket
02 Jan 2024 11:57 - 02 Jan 2024 12:02
I have a 1982 kz750e 4cyl and i have a stuck tappet/bucket that i have tried letting it soak, tapping, suction, magnets, and nothing is working. It will compress but will not come back up unless i tap on the valve. Any suggestions or does anyone have a spare head that they wanna let go of that wouldn't cost me much or would be willing to trade for?
Last edit: 02 Jan 2024 12:02 by Cfoux85.
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- Wookie58
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Re: Stuck tappet/bucket
02 Jan 2024 12:43
Before you get in too deep I would suggest removing the valve spring and seeing how easily the valve moves (sounds like it may be a bent valve rather than a bucket issue)
1982 KZ1000 Ltd
www.kzrider.com/forum/11-projects/617631...-82-begins?start=192
kzrider.com/filebase-alias?view=download...d-fault-diagnosis&ca
www.kzrider.com/forum/11-projects/617631...-82-begins?start=192
kzrider.com/filebase-alias?view=download...d-fault-diagnosis&ca
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- Injected
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Re: Stuck tappet/bucket
02 Jan 2024 14:58
Heat around the bucket area with a propane torch then grab it with some channel locks (wrap the jaws with duct tape) twist and pull
1978 KZ650B2 w 1197cc Z1 engine
1977 KZ650B1 w 750cc Spectre engine
1979 KZ650C3 w 831cc Hot Rod engine
1978 KZ650C2 w 762cc DFI project
1977 KZ650C1 stock restoration project
1978 KZ650B2 modified project
1978 KZ650B2 Injected Drag 831cc
1980 Z1 Custom Frame Drag 1327cc
1981 Z50R Honda tow bike
1977 KZ650B1 w 750cc Spectre engine
1979 KZ650C3 w 831cc Hot Rod engine
1978 KZ650C2 w 762cc DFI project
1977 KZ650C1 stock restoration project
1978 KZ650B2 modified project
1978 KZ650B2 Injected Drag 831cc
1980 Z1 Custom Frame Drag 1327cc
1981 Z50R Honda tow bike
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- Cfoux85
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Re: Stuck tappet/bucket
02 Jan 2024 15:53
Would i have to remove the bucket in order to get the spring out? When i tap the bucket down the valve sticks open and i can grab the valve with channel locks and turn the valve so it does move.
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- Cfoux85
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Re: Stuck tappet/bucket
02 Jan 2024 15:54
Injected im definitely going to try that so ill let you know how it goes
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Re: Stuck tappet/bucket
02 Jan 2024 19:59 - 02 Jan 2024 20:05
I had a stuck bucket when the head was on the engine, I got it removed with the method I suggested.
Yes you need to remove the bucket to be able to remove the valve and valve spring. If you have to wreck the bucket to get it removed you can always replace it, hopefully that does not happen. You have the head off the engine so it will probably be easier to heat and remove.
Try heating with the torch while applying a spray lube (WD40 etc) It takes a bit of time to heat the casting up, at least 5 mins while hitting it with lube a few times then try to twist it out. If it does not come out on the first try do it again till it moves.
Yes you need to remove the bucket to be able to remove the valve and valve spring. If you have to wreck the bucket to get it removed you can always replace it, hopefully that does not happen. You have the head off the engine so it will probably be easier to heat and remove.
Try heating with the torch while applying a spray lube (WD40 etc) It takes a bit of time to heat the casting up, at least 5 mins while hitting it with lube a few times then try to twist it out. If it does not come out on the first try do it again till it moves.
1978 KZ650B2 w 1197cc Z1 engine
1977 KZ650B1 w 750cc Spectre engine
1979 KZ650C3 w 831cc Hot Rod engine
1978 KZ650C2 w 762cc DFI project
1977 KZ650C1 stock restoration project
1978 KZ650B2 modified project
1978 KZ650B2 Injected Drag 831cc
1980 Z1 Custom Frame Drag 1327cc
1981 Z50R Honda tow bike
1977 KZ650B1 w 750cc Spectre engine
1979 KZ650C3 w 831cc Hot Rod engine
1978 KZ650C2 w 762cc DFI project
1977 KZ650C1 stock restoration project
1978 KZ650B2 modified project
1978 KZ650B2 Injected Drag 831cc
1980 Z1 Custom Frame Drag 1327cc
1981 Z50R Honda tow bike
Last edit: 02 Jan 2024 20:05 by Injected. Reason: info
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- Cfoux85
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Re: Stuck tappet/bucket
02 Jan 2024 20:39
Cool ill have to get me a propane torch now because ive tried using my little butane lighter torch but i had it lit a little to long and it kinda blew up on me. Ive even tried drilling a hole in the bucket but it didnt even scratch the thing lol what are those made out of anyways?
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- SWest
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Re: Stuck tappet/bucket
02 Jan 2024 21:05 - 02 Jan 2024 21:06
Hardened steel. I used an aluminum rod to hit the tappets lightly making them bounce while using ATF/acetone mix to loosen them. On the stubborn ones I heated them up with my torch. It was a junk head that sat in the dirt for years. I got them all out, the vales and seats had just been done. I cleaned and ported the head that's what I'm running now. I agree it must be a bent valve if so the valve guide will be shot as well.
Steve
Steve
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229
Last edit: 02 Jan 2024 21:06 by SWest.
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- Cfoux85
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Re: Stuck tappet/bucket
02 Jan 2024 22:35
Oh great. This is the 2nd head that ive gotten thats no good. The last one had a broken valve guide and now this one. How hard is it to replace the guides?
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- Wookie58
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Re: Stuck tappet/bucket
03 Jan 2024 02:01Replacing guides isn't a complicated process but to be honest by the time you buy the tools (drifts and a reamer) and with the potential to "get it wrong" it would probably be cheaper in the long run to use a shop if you haven't done it before (ideally you would get the valve seat re-cut to the new guide also)Oh great. This is the 2nd head that ive gotten thats no good. The last one had a broken valve guide and now this one. How hard is it to replace the guides?
1982 KZ1000 Ltd
www.kzrider.com/forum/11-projects/617631...-82-begins?start=192
kzrider.com/filebase-alias?view=download...d-fault-diagnosis&ca
www.kzrider.com/forum/11-projects/617631...-82-begins?start=192
kzrider.com/filebase-alias?view=download...d-fault-diagnosis&ca
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- asphalt900
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Re: Stuck tappet/bucket
03 Jan 2024 04:47
Good Morning! If You get in a pickle and find something not suitable with the (2?) heads in your possession let me know, I've got a spare LTD750 82-83 head down in the outbuilding taking-up space. Have had it for years but haven't really looked at for years either. Of course it's not black like the E model, natural color.
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