tacticalturnip
Elite Member
You're a treasure in this community- coming here with simple solutions and the knowledge to back it up!
You're a treasure in this community- coming here with simple solutions and the knowledge to back it up!
OP
R Barger
Silver Member
- Joined
- Jan 1, 2013
- Messages
- 242
- Location
- Gate City, Va
- Tractor
- YANMAR YM336D/W Loader JOHN DEERE 850/ W Loader 2WD&4WD Kubota RTV 900
I have replaced the radiator cap with a new one and also tried a couple of others including a vented 15lb one.
OP
R Barger
Silver Member
- Joined
- Jan 1, 2013
- Messages
- 242
- Location
- Gate City, Va
- Tractor
- YANMAR YM336D/W Loader JOHN DEERE 850/ W Loader 2WD&4WD Kubota RTV 900
The overflow is clear. That is the first thing I checked. I can't check it 2 days after running it and there will be slight pressure in the system. That's what is why I thought the system does not have a leak.
careyo63
Elite Member
- Joined
- Jan 6, 2012
- Messages
- 2,530
- Tractor
- 77 Yanmar YM2000 63 Ford 2000
Remaining pressure days later sounds like a dirty clogged up radiator. Air pressure pockets is what I call it. Running should be around 13-15 PSI.. A big chain Auto parts store will rent or lend a test kit to check it.
OP
R Barger
Silver Member
- Joined
- Jan 1, 2013
- Messages
- 242
- Location
- Gate City, Va
- Tractor
- YANMAR YM336D/W Loader JOHN DEERE 850/ W Loader 2WD&4WD Kubota RTV 900
My thought is maybe part of the radiator is clogged causing a little more than normal pressure when running at 2000 rpm for a length of time. Coolant not leaving the bottom as fast as the pump is putting it in. I am going to back flush the radiator today if that don't change things I'm going to go ahead with the head gasket replacement.
ponytug
Super Member
Have you tried looking in with a bright light or borescope to see if you see signs of gunk or corrosion?
All the best,
Peter
KWentling
Veteran Member
- Joined
- Jun 22, 2002
- Messages
- 1,149
- Location
- Rozet, Wyoming
- Tractor
- Kubota BX22, Kubota ZD21, Kubota M7060
Kind of a long shot here but I have seen the inner lining of hoses come loose and act like a check valve. You might check the hose between the expansion tank and the radiator neck.
OP
R Barger
Silver Member
- Joined
- Jan 1, 2013
- Messages
- 242
- Location
- Gate City, Va
- Tractor
- YANMAR YM336D/W Loader JOHN DEERE 850/ W Loader 2WD&4WD Kubota RTV 900
The hose is a single ply hose with no problems.
Today I removed the thermostat flushed the engine and back flushed the radiator. Everything is very clean. At 2000 rpm with the cap off the the water passes through the radiator with no restrictions. The thing that surprised me was I put the radiator cap on and rode the tractor at 2000 rpm for 15 min. and it put no water in the expansion tank. The was cool enough that I could put my bare hand on it. Every time I decide to do the head gasket, I start having second thoughts.
ponytug
Super Member
Diesels are much more efficient than gasoline engines, as they are fuel limited. A fair amount of the non-work heat losses are passed through the exhaust due to lean mixtures burnt in a diesel engine.
That said, my apologies, I am still trying to understand your problem. The engine isn't overheating, it runs, and it leaves some coolant in the reservoir. That sounds like normal operation from this armchair. What am I missing?
All the best,
Peter
kennyd
Advertiser
LOL, here's what I thought from the thread title:
