RX7320 problems @7 hrs on the meter

[THEPARTYHOUND]

I put another 7 hours on the clock since the block heater was (re)installed. So far, so good. No leaks or blowouts. I just hope that there was no internal cylinder wall damage caused when the tractor lost fluid and heated up enough to lose power. I can't think of a way to show one way or another if it did or not. I suppose a leakdown test would show if it were bad enough. Wouldn't think that would be a quick or easy test to run though.

 

[grm61]

I put another 7 hours on the clock since the block heater was (re)installed. So far, so good. No leaks or blowouts. I just hope that there was no internal cylinder wall damage caused when the tractor lost fluid and heated up enough to lose power. I can't think of a way to show one way or another if it did or not. I suppose a leakdown test would show if it were bad enough. Wouldn't think that would be a quick or easy test to run though.

A coolant temp gauge needs liquid water/coolant on the sensor to give a proper reading...It got way hotter than what your gauge said...lost power? Partial seize?:shocked:

No way I would accept that as a lifetime purchase.
Yea, it cooled down and seems ok, but it is no longer as new... ran it long enough to lose power.....its hurt, tell them to shove it...

 

[cat fever]

^^^^^
What he said.


I would think some type of unlimited engine warranty could be negotiated. If not tell them to simple trade tractors and give you a new one.

 

[Amvcane]

Just a thought, does anyone know if the Kioti ECU is programmed to shut the engine down during an extreme overheating event to avoid engine damage. Would there be any history of such stored in the ECU.

 

[THEPARTYHOUND]

Negative. without coolant in the block the temp measuring probe has nothing to measure from.

 

[boomer1025]

If it lost power, then possibly there is a good chance the cylinder walls and piston skirts are scuffed an the piston rings lost their temper. If it starts using oil and smoking you will know that there was internal damage from the loss of coolant.
That's the bad thing with block heaters that don't screw or bolt into the block.
I brought a heater for my NH and it goes into a freeze plug hole which is held in place by a toggle bolt. I never installed it, seen to many that came out and destroyed the engine.

 

[THEPARTYHOUND]

What would be the easiest way to inspect the inside of the cylinders? Do glow plugs go into the cylinder or the intake? Remove one and insert an inspection camera into the cylinder?

 

[atsah]

What would be the easiest way to inspect the inside of the cylinders? Do glow plugs go into the cylinder or the intake? Remove one and insert an inspection camera into the cylinder?

You could but it would be tough to be sure either way, if it were me, I would go to the dealer and talk to someone that has authority there and explain that you don't trust this tractor because you lost power due to something they did incorrectly.

Purchasing a brand new tractor and having this happen isn't right, if you keep the tractor the thought that it "may" have damaged the engine will always be on you're mind and that just isn't right..

 

[LouNY]

The only way I know to check that engine is to pull the head so you can check each bore for scoring and look for blueing in the bores.
You still won't be able to see tha rings and look for aluminum melted to them. But usually checking the bores for blueing and scouring will answer most questions of damage.

 

[THEPARTYHOUND]

I think that I will get ahold of the dealer and have them do a compression test and see where that is at. Does anyone have a shop manual to see what range that compression should fall in?

 

[Industrial Toys]

Kind of, sort of related, but it's why I put a coolant presence sensor on a generator I am building.

 

[THEPARTYHOUND]

You'd think that would be a standard sensor on every engine out there! If coolant is lost all at once and there is no coolant left for the temp sensor to take a reading off of, you have no way of knowing that there is a problem till its way too late.

 

[Industrial Toys]

I guess it just isn't a really big issue. I guess it all depends on where the temperature sender is. I guess, much of the time you could smell the coolant, I know I can. On an unattended generator, it's a little different, but even there, the industry doesn't use presence sensors.

People may be over reacting a bit. The fact that it was cold is a bonus. It's not like you ran the thing without oil, and BTW the oil does provide a lot of cooling as well.

My guess, is that things are just fine.

 

[grm61]

I guess it just isn't a really big issue. I guess it all depends on where the temperature sender is. I guess, much of the time you could smell the coolant, I know I can. On an unattended generator, it's a little different, but even there, the industry doesn't use presence sensors.

People may be over reacting a bit. The fact that it was cold is a bonus. It's not like you ran the thing without oil, and BTW the oil does provide a lot of cooling as well.

My guess, is that things are just fine.

It got hot enough to lose power,,,,,why would it lose power?... Partial seize...Gaurantee it is no longer as new, and that is what he paid for.

 

[THEPARTYHOUND]

I called a random kioti dealer and asked him to look up the compression spec in the service manual. The spec was 469-530 psi if I remember correctly. As new as it is, all cylinders should be within about 20-25 psi of each other. I will have them come do a compression test and if the cylinders are out of spec then they can get me a new tractor. I'd say rebuild it, but if they can't get a block heater right I'm not sure I want to go that route.

 

[coobie]

I called a random kioti dealer and asked him to look up the compression spec in the service manual. The spec was 469-530 psi if I remember correctly. As new as it is, all cylinders should be within about 20-25 psi of each other. I will have them come do a compression test and if the cylinders are out of spec then they can get me a new tractor. I'd say rebuild it, but if they can't get a block heater right I'm not sure I want to go that route.

Good luck with that.

 

[THEPARTYHOUND]

Good luck with that.

Thanks bud!

 

[Industrial Toys]

How computerized is the machine? Maybe something else went amiss and shut it down. If it was old school, just a dumb old pump, I might worry. But like I said, it depends on where the sending unit is. No matter what, it still senses temperature and if it got hot enough from air in the passage getting hot, it would still work. And, I'm thinking, maybe since it is designed to work at water temperatures, it might not take that much to raise the air temperature to put it into alarm.

It would be very interesting to hear from someone that designs such things.

 

[cat fever]

Have you made contact with the selling dealer and voiced your concerns about why the engine lost power and shut down? I think a reputable dealer will make it right. If they don't make you happy call Kioti directly and tell them what happened. At the very least they could have an engineer explain the good and bad for the situation.

 

[THEPARTYHOUND]

Hold on there fellas, it never shut down. Sorry if I gave that impression, but I didn't think I said anything to indicate that it shut down. No, it just lost power. Driving across a flat road it would not drive in 4th gear high range like it had before. I had to downshift to 3rd and even then the rpm's wouldn't get much above 2k.
About 20 minutes ago I went into my dealer's service manager's office and talked with him about getting the compression tested. He agreed to it, and since I negotiated travel expenses for warranty work into the purchase, it will be entirely on their dime. Only thing I don't like is he wants to bring the tractor there to do it. I'd rather be there to see the reading myself, or at least have an independent 3rd party do it. That might void the warranty though?