Jinma 354 low operating temperature (TY395 engine)

[GuglioLS]

The following is a solution to solve the cold operating temperature on a TY395 engine (Jinma 354)

After receiving my tractor and using it quite a bit, I discovered the engine operating temp would never get above 40*c (104*F), and it took forever to get to that cool temperature.

After removing the T-Stat housing and T-Stat, I made a mechanical observation that is the cause of the problem and suggest the following solution.


My Tractor: 2005 Jinma 354LE, Engine: Y395 E-3 (EPA)
The stock T-stat: 57* c (134.6* f) (way too low). Read on and you will discover that is only half the problem.

These engines should warm up faster and run at 180* F (82*c)

Purchase a Stant brand T-Stat # 13548 which is 82* C (180* F)
The Stant T-Stat will have to be modified to fit.
Don’t try and use a T-stat that does not look exactly like the stock one. I.E one of those “flat” looking auto t-stats because the bypass won’t work and there will be temp & pump problems.

You could, if you so desire use the stock T-Stat with the addition of a large o-ring on top of the T-Stat. This will seal the gap between the top of the T-Stat and housing that it is enclosed in. If you do this please drill a very small hole in the top of the t-Stat to eliminate air lock in the coolant system. The Stant T-Stat already has one of those little “jiggle” valves.

Click on the below picture - it shows in detail why the engine never warms up:







My lathe was used to turn down the Stant T-Stat flange to 2 – 9/16”.

If you do not have a lathe you could use a bench grinder to carefully grind it down to the right size.




After installing this fix, the engine will come up to operating temp after only 15 minutes (no load @ 900 RPM)

Larry

[bracabric]

I have the 395-I engine in my Jinma 354 and the single instrument setup rather than the combined package like Larry G. My temperature gauge is calibrated ..100.....80.....40 which I assume to be Celsius,the needle has always clung to the stop just below the 40 mark no mater what the work has been. I followed the post (above) by Larry G. and cut an "O" ring to seal the gap between the 'stat and it's housing.

It took two attempts to get the "O" ring the right size as I wanted a tight fit to stop any leakage past it. I cut the "O" ring from a radiator hose that I had, and then drilled a small hole in the 'stat to let air through. I used the existing 'stat as finding a compatible one here is not too easy.
The temperature difference is not great BUT is above the 40 mark rather than below it, I estimate to be 50c which is a distinct improvement.
Thank you Larry

[GuglioLS]

Dick,

Well you finally did it! Great job man. With the stock t-stat ~ 50*c sounds about right as the ones that ship installed in the tractor are rated at 57*c. (Still too low in my opinion) Do you want me to get an 82*c t-stat for you and ship it to Chili? You know I would gladly do that for you. I could even machine it down to the correct diameter for a direct replacement. If I use surface mail it would be real cheap to send, but take a month or so for you to get it. Somehow I don't think you are in that much of a hurry.

Larry

[bracabric]

Larry, I agree with you about it still being too low a temperature and your offer is very kind and you are right I am in no desperate hurry. Sometime in the future, when it's convenient to you I would very much like to take you up on your offer, and, as luck would have it the lady in my life has a US Dollar account at a Bank in the USA, so, when the amount is known, could send you a Cheque direct to your "Casa" also because of a picture you posted some time ago, I know the address!!! If you machined it down to size that would be wonderful as I don't have a Lathe.
One point though, because of the vagaries of the postal service between the 'States and Chile (my ex California pal has had a few things get lost on the way) I would want you to have receipt of the money before dispatch of the goods for your own protection !!
Absolutely no rush! this year, next year not important! There is a part of me that although it's against logic, feels content with an engine running cool, I had a Triumph Stag sports car in the '70s with a V8 engine and it was quite prone to blowing cylinder head gaskets, every time I set out on a long journey one eye would be on the road and the other on the temp' gauge .Also I had something you may not have heard of a Ford Corsair with a 2 litre V4 engine and that just would not run cool, if you had the Heads planed, you had to have the manifold that fitted in between them machined as well which was quite complicated, I got fed up with the expense of it and when it failed again, spent the whole of one night hand stoning the two heads and when it was back together and working , put it through a car auction and surprisingly got more than I paid for it.
You are a great and kindly guy and your help and advise is truly appreciated and don't be surprised if one of these years we drop in and and say hello (your not planning to shoot intruders at the gate like Rob are you?)

Dick

[GuglioLS]

don't be surprised if one of these years we drop and and say hello

Dick,
It would be our honor to have you and the Misses as our guests. Please bring that hot looking house keeper of yours, and Don't forget you'll get to drive the Dozer during your stay. We have plenty of room, so stop on by anytime you happen to be in the neighborhood.

(your not planning to shoot intruders at the gate like Rob are you?) LOL, Not to worry, I'm not like Rob who shoots anything that moves.

I'll get you that T-stat, machine it. When the time comes you can send me a PM with your address so I can send it off to you.

Larry

[3RRL]

Thanks for posting that Larry.
I will be doing that to Loretta's 284 Honeybee next week. Running it all weekend it never came up to temperature, so I suspect it has the exact same problem.

My plan is to use the stock thermostat though. I presume from your post all I need to do is get/make a rubber "O" ring of some kind to get it to seal, right?
anything else I need to do?
Thanks,
Rob-

[GuglioLS]

Rob,

Well I don't know for sure about Loretta's 284 engine and t-stat setup. Based on your description, it sounds like the exact same thing is going on with hers as is with all Jinma 354's with TY395 engines.

I used a piece of Radiator hose as a gasket to seal that gap between the top of the t-stat and the housing. Cant think of anything else you will need. Perhaps take the t-stat out first to take a look. You'll be able to determine right away what's going on and what will work on hers.

I've seen some guys use schedule 40 PVC pipe, machined Copper or brass rod . Personally I like the rad hose as it gives the best seal, is resistant to heat and the coolant, Also, it will be easy to make at camp.

Of all my mods, posts and crazy ideas, I think this one is the only one that has become sort of famous. Without a doubt it works and has helped the most people get their Jinma engines up to operating temp.


Larry

[bracabric]

Larry, you do yourself down, the t-stat mod is indeed famous but so are the "cup holders, Dozer mirrors, Dozer light protectors, dump trailer etc. etc. etc. (and many more )
Dick
PS Thanks again for all your kind offers ! And do remember there is p-l-e-n-t-y of time, I rushed around like the proverbial "Blue arse fly" for years but now I don't have to, so I ain't going too!!!

[GuglioLS]

Dick,

I picked up your 82* c thermostat today. I also machined (turned down the flange) so that it will fit.

I found a new source (NAPA auto parts) for the T-stat it's their part # 133 View it online




Larry

[GuglioLS]

I also made several different thickness sealing gaskets for you out of radiator hose. :



Larry

[GuglioLS]

Check out how I cut the radiator hose into small sealing gaskets. I wanted them to be perfect, so I came up with an idea to cut the hose on the lathe. I found a piece of EMT that press fit into the radiator hose, then chucked it up in the lathe. Then used a utility knife blade mounted in a cutoff tool holder. It worked great! Check it out:




It's done so just PM me your address and I'll get it off to you in the next couple of days.

Larry

[3RRL]

Wow Larry, even greater documentation for your famous 354 thermostat mod!
LOL ... in that first video cutting that radiator hose off, I was surprised to hear Keko barking in the background. At first I thought it was chatter or squealing from the lathe cut!
That sure is nice of you to make that stuff for Dick and send it to him.
No wonder they call him "Lucky Dick".

[red]

Larry-
Just AMAZING.. The things you come up with. Thanks for sharing -Ed

[GuglioLS]

Hey Rob and Ed,

Thanks guys, it worked out pretty good. Now I am wondering when Dick will see that his T-stat mod is complete and ready to go?

Does anyone want to take a guess? I have not PM'd him. So lets see who can guess when he notices this. Maybe he forgot all about it? or thought I was just BS-ing and wasn't really going to do this for him.

Larry

[red]

Larry- you never struck me as a B S er and have always helped out everyone. I'm younger than Dick and I couldn't remember where the post was. It not a matter of believing you would do it but a matter of remembering. . . My bet is 3 days -Ed