4020 engine

1 Dollar · Jun 3, 2008

What would cause a 4020 to sieze up? The engine has 11,000 hours and has never been rebuilt, so I'm not complaining. But, grandpa was mowing hay with it and noticed it getting hot, put more water in it, and didn't make it another round before she stopped.

Thanks

Bob · Jun 3, 2008

The question is NOT "why did the engine seize up".

The question is, WHY was it overheating while running a mower, and why did he continue to run it without determining the cause of the overheating, leading to it seizing up???

1 Dollar · Jun 3, 2008

Hey, never said it overheated, just that it was running hotter than normal, checked the water, it was a little low but it was visibly there, so added what would fit in and went out to try it again.

So, the question remains, what would be a possible cause of a 404 diesel siezing up?

Thanks

rexhellwig · Jun 3, 2008

Back in the day, It was possible to score a 4020 piston to a cylinder liner with a sudden hard load on a cold engine. But this was more likely to happen with 1000 or 2000 hours, not 11,000.

This is probably crankshaft bearing related. An autopsy is in order.

Bob · Jun 3, 2008

If the lost water is leaking into the crankcase though a pitted or damaged sleeve, or failed sleeve seals it can cause bearing failure.

Did you pull the dipstick to see of the oil is milky and/or overfull?

If there's water in the oil, it could have lead to bearing failure.

It certainly COULD be a scored piston, siezed in the sleeve, as well. (BT,DT.)

You'll know more when you get the oil pan and cylinder head off.

d. coleman · Jun 3, 2008

your first statment said what would cause a 4020 to sieze-up. water low, little hotter than normal. what about a leaking head gasket allowing water to enter cylinder? water isnt compressiable and could cause engine to stop. just my thoughts. good luck. d. coleman

jared in wi · Jun 3, 2008

sounds to me like your water went in to the crankcase. leaking o-rings, cavitated through the sleeve, or cracked block. given the little info, i would say o-ring or cavitated sleeve. check the oil level, and look at the head end of the dipstick, if there is a gray gunky substance, that means water in the engine oil. drain the oil, remove the oil pan, and pressurize the cooling system with a radiator pressurizer, and look for the leak.

jared

stevejd4000 · Jun 3, 2008

you may have things in front that plug up the air going in where the fan is when mowning. wash it out. and check your oil if it looks milk or green oil....

buickanddeere · Jun 3, 2008

Perhaps thermal shock? Cold water hitting over heated metal? Maybe something split?
Or contracted a sleeve smaller and seized onto a hot over sized piston and seized?

Edpap · Jun 3, 2008

Hello,
about the only thing that will lock up a good running motor is a bearing failure. it is possible that it was running hot because the bearing was going bad. a fast check would be drop the engine oil if you find metal then you know what to do. at 11,00 hours it is time for a rebuild anyway.
Good Luck Ed
abcrepairparts

RobMD · Jun 3, 2008

Put two and two together, that's what you get based on the description. Cold water and a hot engine, especially on expansive/contractive sleeves equals seizure, for sure.

1 Dollar · Jun 4, 2008

Allright, thanks guys. Thats what I was looking for.

4020 engine

1 Dollar

Member

Bob

Well-known Member

1 Dollar

Member

rexhellwig

Member

Bob

Well-known Member

d. coleman

Member

jared in wi

Member

stevejd4000

Member

buickanddeere

Well-known Member

Edpap

Member

RobMD

Well-known Member

1 Dollar

Member

Similar threads