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Flooded Cylinders in MM ZTS

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Todd Brewer

07-02-2003 08:46:12




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I recently aquired a MM ZTS in pretty good shape. When I filled the radiater I noticed it leaking antifreeze out the cylinder head, so I popped the head, cleaned it up really nice with a scraper, put on new head gaskets, then torqued the head back on. I re-filled all the fluids and probably turned the thing over a few thousand times while I worked on things like the carb and magneto,with no problems. When I finally got it to start it ran for about 10 seconds and died and I could not get it to kick after that. When I pulled out a plug antifreeze came pouring out. All clyinders were full of antifreeze by way of the exhaust manifold.

I cannot find any indication of cracking in the head or cylinders, and there is no antifreeze in the oil. My friend suggested I had a warped head, but when I took it to the machine shop they told me it couldn't be machined because of the shape of the head. I put a straight-edge on the head and think it may be warped.

Any suggestions??

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Jim Hlasny

07-05-2003 06:42:28




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 Re: Flooded Cylinders in MM ZTS in reply to Todd Brewer, 07-02-2003 08:46:12  
Todd,
This is what I had to do to my 51 ZAU.
Bought the tractor, it had been sitting for 10 years. After changing all the fluids and putting new heads gaskets on, number 2 kept filling up with coolant. I pulled the head, put duct tape over all the water passages on the cylinder base and slowly filled the radiator back up. With in seconds I found where the water was coming from. There was a crack where the vertical cylinder wall meets the horizontal top of the combustion chamber. Couldn't even see the crack, but the coolant found it. Long story short, cracked jug.
-Jim

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dlp

07-02-2003 17:46:33




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 Re: Flooded Cylinders in MM ZTS in reply to Todd Brewer, 07-02-2003 08:46:12  
You can make a pressure tester using the head, a rubber valve stem from an old inner tube, & a piece of the inner tube for a gasket. Cut a piece of inner tube that can be used for a head gasket. Only knock out the bolt holes. put the tube & head on & torque. Fit the valve stem over the water outlet on the head, use a big flatwasher & bolt it down. Then you put air pressure in the block & shoot some soapy water down into the cylinder. It will let you know if it leaks or not. Most people I've talked to say it will leak at the upper end of the cylinder. If it doesn't, I wonder if someone tightened the cylinders down first THEN fitted the head.

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havvey

07-02-2003 13:07:11




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 Re: Flooded Cylinders in MM ZTS in reply to Todd Brewer, 07-02-2003 08:46:12  
if it did not fill the cylinders before its probably an istlation problem check for cracks and warpage i would look for a new machine shop



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moline

07-02-2003 10:38:57




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 Re: Flooded Cylinders in MM ZTS in reply to Todd Brewer, 07-02-2003 08:46:12  
I think if a manifold bolt is changed and one is installed that is too long,the new bolts breakthrough to the water jacket and antifreeze comes up around the bolts and down into the exhaust ports.Somebody correct me if Im wrong but that might be a place to check.



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Todd Brewer

07-06-2003 19:48:12




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 Re: Re: Flooded Cylinders in MM ZTS in reply to moline, 07-02-2003 10:38:57  
There are no manifold bolts. There are threaded posts out of head that the manifold goes on. Just like the head, you just thread on nuts and sinch them down.



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Kevin Moschenrose

07-02-2003 22:21:35




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 Re: Re: Flooded Cylinders in MM ZTS in reply to moline, 07-02-2003 10:38:57  
Moline, BINGO! Nail right on the head!



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dlp

07-03-2003 19:29:07




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 Re: Re: Re: Flooded Cylinders in MM ZTS in reply to Kevin Moschenrose, 07-02-2003 22:21:35  
Wouldn't the gasket seal it off? Each bolt has gasket material surrounding it, right? I know one of my other tractors is made that way & I just used a sealer to seal the threads. Anyway, sure seems like a lot of water flooding the cylinders to come from around some bolt threads.



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Curtis

07-02-2003 10:26:27




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 Re: Flooded Cylinders in MM ZTS in reply to Todd Brewer, 07-02-2003 08:46:12  
If the antifreeze came by way of the exhaust manifold, you may have a hole or crack in the exhaust port. I had one on a KT. Never noticed it from casual observation even while grinding valve seats, but it made itself known when I first started the motor.



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Todd Brewer

07-02-2003 10:29:13




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 Re: Re: Flooded Cylinders in MM ZTS in reply to Curtis, 07-02-2003 10:26:27  
So I guess that would mean a new cylinder block then?



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Curtis

07-03-2003 10:02:48




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 Re: Re: Re: Flooded Cylinders in MM ZTS in reply to Todd Brewer, 07-02-2003 10:29:13  
If you confirm that's the problem, that would be about the only fix.



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