funwithfuel
Senior Member
Where you at in this? I mean. I'm talking generalities here, but have no real knowledge on what he's up against. What's yer thoughts?
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Low coolant temp?
- Thread starter Johndeere120
- Start date
Truck Shop
Senior Member
Like Funwithfuel said--the outer seal on a piston type stat. It's common for those to be
missed, just a little tear can flow allot of coolant.
Johndeere120
Well-Known Member
Yeah the outer seal was on it and I was careful when putting it in and old one looked fine too. Looking at diagrams here and noticed there's a coolant bypass valve on top of the radiator. Any idea what that does exactly and can it cause my issue? Just a thought there's nothing else to the entire system it looks like except that bypass valve and thermostat
Truck Shop
Senior Member
I would guess as exactly as it's noted-bypass. What hoses feed it? or does even have hoses
going to it. I would expect Diesel Dave knows or MG2361.
Johndeere120
Well-Known Member
It's hard to tell exactly but looks like it goes into the radiator and the other side I'm not sure the diagram isn't very clear. I can look more tomorrow and see. I'm wondering if that's stuck open but I'm not really sure but considering 2 thermostats didn't work and that's all that's left seems wierd
funwithfuel
Senior Member
Which thermostat do you have? Is it vertical or horizontal? Does it have a bubbler it? Is your cylinder head air-locked? Do you have strong coolant flow through your heater hoses?
Johndeere120
Well-Known Member
It's vertical and looks more like the one on the right. How can I check if the cylinder head is airlock? Heater hoses appear to have good flow. I was reading if that thermal bypass valve is stuck open it can cause low Temps apparently
funwithfuel
Senior Member
There's a seal in the bore that the tube body must fit tightly into it. If it "fell" right in, it's no good. You should feel resistance when pushing it in.
See if coolant purges from hose nipples or coolant passages in the head.
mg2361
Senior Member
What is the machine's complete serial number? There are 4 different engine models available for a 310J.
What part number thermostat did you get?
Is this something that just started happening or was it always an issue?
What part number thermostat did you get?
Is this something that just started happening or was it always an issue?
Johndeere120
Well-Known Member
I'll get the number today when I'm there but I know the engine in it is a 4045ht054 series. When I put the thermostat in there was definitely some resistance. Not super hard but it was a good tight fit with the seal not sure on part number I can check later on the bag is in the cab. It was an issue since I got it around 3 or 4 years ago. The thing was I havnt used the machine much at all I was able to pay it off really fast with some jobs I got lucky on so I only put around 150-200 hours on it and most of those were in the summer and the gauge always came up some so I figured everything was okay never thought about it but I will be using it more nowadays again. I can try another thermostat and take out and inspect the one I put it but I highly doubt it's that I looked at the seal really good when I put it in and it wasn't loose. Old one wasn't stuck open or damaged at all either
mg2361
Senior Member
For an HT054, this should be your configuration. Does this match what you have?
Johndeere120
Well-Known Member
Yup that would be it!
Tinkerer
Senior Member
Is the opening temperature stamped on it ?
Johndeere120
Well-Known Member
I ordered one but it's still cold I felt all the hoses so the gun was probably a waste of my money. It's not possible that the engine engine running up to temp and the gauge is wrong. The gauge COULD be wrong but it's still not getting warm plus there's no heat
There could be no heat for multiple other reasons. Touching hoses is not a good gauge of temperature. The only way I know of for an engine to not create the needed heat with a new thermostat is either the coolant is bypassing through a bypass hose somewhere, no thermostat installed, the engine is incapable of creating the heat, or a mismatch of component parts.
Johndeere120
Well-Known Member
I got the gun coming today so tomorrow or Monday whenever I'm back I'll take some shots and see what's going on but i think it's the bypass valve. John deere claims a stuck open bypass valve can cause low temperatures but I'll take shots first before I do that it's over 300 bucks for a little valve
Shimmy1
Senior Member
Couldn't you just block it off to test? Take one hose off, plug it, put another short chunk with a plug on that fitting and see??
I've gotten faulty thermostats, if it's not hard to change I'd run to Napa and grab another, hopefully a 195° or even 210° if they have that option.
Otherwise, like Ve says, get a gun to it when it's as warm as it can get and see what it says.
NH575E
Senior Member
I see several different part numbers listed for 310J thermostats but none have any temperature details listed. You need to look at the temperature stamp on the thermostat or it's package to see what you installed and ask a parts department if there are any temperature alternatives or options.
On an unrelated note my JD 4310 Compact Utility Tractor has a 160 degree thermostat with no option for a warmer one. It is open station so I have no reason to circumvent the factory design but I find it unusual. When I called a JD parts department they could tell me what temperature the thermostat was rated at even though it didn't list that info in the online parts listing.
On an unrelated note my JD 4310 Compact Utility Tractor has a 160 degree thermostat with no option for a warmer one. It is open station so I have no reason to circumvent the factory design but I find it unusual. When I called a JD parts department they could tell me what temperature the thermostat was rated at even though it didn't list that info in the online parts listing.
mg2361
Senior Member
There was a product improvement program to address cab heat on those machines depending on the machine serial number (which you never posted). Is your coolant bypass valve silver or black in color?