First tractor, did i get burned? ym2000 cracked block....

kenmac · Sep 12, 2012

never add tap water. Always use distilled water. 50/50 pre mix antifreeze is what I use. If there are no leaks at the crack. The crack may not be into the water jacket

Willl · Sep 12, 2012

Can u post a good picture of this crack ?

fbson395 · Sep 12, 2012

Many years ago I worked in a job shop. We had a motor that someone just rebuilt but did not put in anti freeze. We welded a crack and put the motor back in. Then Used Bar Leak and ran the motor for hrs and watched as the leaks coming out of the welded area stopped. I don't know how long it lasted but it was never retunred, so I assume it was ok.Worth a try! after you put it back together, Good Luck

Gale Hawkins · Sep 12, 2012

It sounds like the tractor is working so maybe it will be ok without a lot of expense.

Working a tractor at those RPM's for 30 minutes without loosing coolant would indicate to me it does not have serious problems like a cracked block.

vwnotrunning · Sep 12, 2012

I can see maybe replacing the water pump, but do not think I would pull the head to replace a head gasket unless there is actually a problem with the head gasket. Running good, no water in oil, no water in cylinder -- sounds like no head gasket problem

clemsonfor · Sep 13, 2012

An easy way we always say to tell if its the head gasket, is to open the hood and start tractor up, if you radiator is full and you look into it after starting it you WILL see bubbles if there is a bad head gasket. Not just turbulance and movement but bubbles coming out of it.

If there was just a low flow of water out of the hose at 1500 rpms or so i would say you have a bad water pump.

As far as the crack, you may want to clean it up then either have someone who knows what there doing it lay down a bead or try more JB in the cleaned area.

Oh and running at 1500rpms for 30 mins would show a sure fire problem like a gaping hole but does not really tell you your 100%. Thats really not a lot of time to be running this time of year at that rpm to generate much heat or pressure. Deisels run cool by nature at idle. And i think my service manual says a high idle is anywhere around 1300-1500 (just dont remember but was thinking it was 1500??) so it your running 1500-1700 your not really even making full power your just barely over a high idle. These tractors are designed to make full power at 2400rpms and i usually run when bushhogging at 2000-2200rpms.

Car Doc · Sep 13, 2012

If it runs 30 minutes w/o barfing all the water out into the overflow bottle I think is a good sign because as the engine warms up the bubbles will happen in the overflow bottle for sure if its got much of a head gasket leak. I second the water pump may be bad and if its got a thermostat (but I dont think it does) change it too and the cap.

I would not get in too big a hurry to tear into the motor yet its needing some tlc and give it time to let you sort the issues out before installing some of your own doing. Not saying that as a personal attack just that things stack up and can work against you on these projects let us help you prioritize the work if we can! :thumbsup:

clemsonfor · Sep 13, 2012

There is no thermostat on a ym2000, so he dont have to worry about that.

California · Sep 13, 2012

And YM2000 is big brother (same engine, larger bore) to YM1700 that doesn't have a water pump. I think so long as it is in light use, the water pump can wait until the other issues are resolved.