YM1700 Water in CYL #2

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atjohnson7662
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YM1700 Water in CYL #2

Postby atjohnson7662 » Mon Mar 25, 2019 12:47 pm

I recently acquired a YM1700 that was partially disassembled. After scavenging the parts together that were missing, it is reassembled. I've had it running twice, but it is dumping water in cylinder #2 for the second time. The last attempt, I installed a new head gasket and sealed it with copperkote with no luck.

I have physically inspected the cylinders and heads but have not found any obvious cracks. I also sat a straight edge across the mating surfaces and it doesn't seem warped but I'm out of ideas.

Any ideas or thoughts???

Aaron
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Re: YM1700 Water in CYL #2

Postby Aaron » Mon Mar 25, 2019 1:42 pm

That model is prone to overheating (because it does not have a water pump and requires certain antifreeze mixtures) and when it overheats it can crack the head. It is also prone to freezing (same reason as above) which can also crack the head or block. You could get your head tested/magnafluxed to rule out any cracks. Sometimes they can be very hard to see.

atjohnson7662
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Re: YM1700 Water in CYL #2

Postby atjohnson7662 » Tue Mar 26, 2019 9:35 am

Thanks Aaron. I will pull the heads and have the local diesel service check them. If they are good, I'll move on to the block. The engine was partially disassembled when i found it and only had a small amount of coolant/water in the lower portion of the engine. Due to the location of the water, it has to be high on the coolant path so I'll cross my fingers that it isn't in the lower portion of the block.

winston
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Re: YM1700 Water in CYL #2

Postby winston » Tue Mar 26, 2019 10:12 am

cylinder liners suppose to stand out .0028 to .0059. Might check that make sure head gasket has that sealing surface.

atjohnson7662
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Re: YM1700 Water in CYL #2

Postby atjohnson7662 » Tue Apr 02, 2019 9:51 am

Well I pulled the heads and sent them to the local shop that services smaller diesel engines and they immediately found a hair-line crack above cylinder #2. This is apparently not the first set that he has seen since he went right to the problem area. They said i could either find another set or send them to a shop in Minnesota that specializes in these heads. Is anyone familiar with this place?


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