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School me about CCK bottom ends


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  #11  
Old 04-09-2017, 11:15:41 PM
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Default Re: School me about CCK bottom ends

Just pulled the other head and confirmed that piston is not moving either, Hard as it is to believe both rods appear to have let go. As far as I can see the crankshaft can't be broken as the back turns , the front turns so the middle has to be turning, hence it is in one piece!! Two broken rods who da thunk it. Will get on to the rocket surgery in the next couple of days. Cheers Dan
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Old 04-09-2017, 11:21:11 PM
Wayne 440 Wayne 440 is offline
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Default Re: School me about CCK bottom ends

That was fast. Will be interesting to see if we can tell how that happened.
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Old 04-09-2017, 11:25:44 PM
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Default Re: School me about CCK bottom ends

Uncontrolled overspeed?
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Old 04-09-2017, 11:28:34 PM
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Default Re: School me about CCK bottom ends

both pistons not moving? that's really odd. With the one not moving and half way down the bore makes me think the rod is broken somewhere close to the big end. with both piston not moving I have to wonder, does it have rods in it all?
Enquiring minds want to know. pics of the inside please.
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Old 04-09-2017, 11:32:18 PM
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Default Re: School me about CCK bottom ends

Rods are aluminum?
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Old 04-09-2017, 11:44:07 PM
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Default Re: School me about CCK bottom ends

Pics as soon as I get her apart. I cant get over the fact that it does not make bad noises. I should put an oil pressure guage where the sender is and see if it still got oil pressure. When I pushed the one piston down with my finger it took no pressure to do that. When I cranked it that piston was once again pushed about half way back up the cyl and stayed there. I am wondering if a RV CCK could be a donor engine , is there enough crossover for it to work easily. If so could it be a 4Kw as they seem easier to find. This one has a separate starter so would that be a problem to fit. I will have to read Johnny Cs thread to refresh my memory. Cheers Dan
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Old 04-09-2017, 11:57:39 PM
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Default Re: School me about CCK bottom ends

If it is a welder engine that turns up to 3600 rpm then it shouldn't have aluminum rods, it will have steel or cast iron rods. Dan, When you are turning the front part of the engine, does the welder generator shaft turn? I think I would suspect a broken crank. If the engine has steel rods then you can't use a generator engine unless it is the 10kw, 3600 rpm cck engine. The 1800 rpm engines use the aluminum rods with no insert bearings on the rods.
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Old 04-10-2017, 12:07:42 AM
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Default Re: School me about CCK bottom ends

Both ends turn when cranking the flywheel and the generator fan end. Good point about the CCKB engine. The mystery will be solved when I get it open. Cheers Dan
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Old 04-10-2017, 12:08:17 AM
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Default Re: School me about CCK bottom ends

This is for sale down in TacoTown:

https://seattle.craigslist.org/tac/grd/6050110776.html

Its an equipment engine so not governed at 1800. Might be similar vintage. Asking 2 bills USD.
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Old 04-10-2017, 12:14:21 AM
LRomero LRomero is offline
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Default Re: School me about CCK bottom ends

Don't assume Steel rods. I watched this video a while back before I pulled my 4CCK apart to re-ring it. It's a p220g out of a lawn mower which would be 3600rpm and has aluminum rods. https://youtu.be/JAqxaSdpuSo

What about the scenario of one rod beaking, then it being ran until the other rod broke. We all know these engine runwith just one cylinder, but lack of power. That would tie it to the report of it running like crap.
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