Jinma Operating Temperature – SOLVED !!!!

[billbill1]

I've been lucky I guess, mine has alway ran 80c, no more no less. Glad you got yours figured out though and I too enjoyed your post and solution.

 

[greg_g]

</font><font color="blue" class="small">( I have had just the opposite happen to my jm224. I was mowing three foot tall grass. The tractor got hot . I would let it cool down then try again the same thing happened in around five min. I finally took the thermostat out completely and finished the job. )</font>

Well, that adds yet another dimension - but still not uncommon in the 200 Series Jinma. The radiator fins are easily clogged by seeds and chaff. Because of the battery location, the owners often don't even realize they're operating with severely restricted airflow. Another problem with the 200 series is the location of the fresh air intake. The tremendous suction of a diesel intake creates a vortex IN FRONT of the radiator - also disrupting airflow. And third is the fan shroud; 200 series fans have to be completely encased in the shroud to maximize the fan's pulling power. The typically dirty cooling systems and rusty pressure caps don't help either.

In your case, the pre-existing design problems were probably aggravated by a thermostat that was stuck closed.

//greg//

 

[JohnS]

Greg, I agree with you that I would expect a hotter t-stat in an EPA certified engine. I also feel GuglioLS is on to something, though. Those bypass slots on the T-stat look like they could flow a significant amount coolant, which would delay the warm-up time. I am sure someone could do a test to prove it, but probably uneccessary.

GuglioLS, I think you did an excellent job documenting this work, such that anyone could repeat it. At the very least, it provides a US t-stat replacement, with or without the bypass provention seal. One thought that came to me, was providing a small bypass at the top of the seal. ie a v-notch or u-notch. Something that would prevent the possibility of becoming air bound, but not impact the warm-up time in any significant way. Thoughts?


PS: Up until my recent trips (Dec & Jan) to Albuquerque, I would never of guessed that your weather would require any concern with warm-up time! /forums/images/graemlins/crazy.gif While no snow, there were a high number of days where it was warmer in NY! The almost constant wind added to the wind chill, too. That 5000+ foot elevation, makes a big difference.

 

[Harrygoodwrench]

</font><font color="blue" class="small">(

One thought that came to me, was providing a small bypass at the top of the seal. ie a v-notch or u-notch. Something that would prevent the possibility of becoming air bound, but not impact the warm-up time in any significant way. Thoughts?



I think a very small hole (maybe 1/32nds) drilled in flange of thermostat itself would suffice. Many Asian car makers do such a thing. Some even have a jiggle pin to help keep the hole open. Or a notch cut into the rubber seal as JohnS suggested. Either way would work.
Great job GuglioLS and good suggestion JohnS.

 

[GuglioLS]

<font color="blue"> (Those bypass slots on the T-stat look like they could flow a significant amount coolant, which would delay the warm-up time.) </font>

Correct.
The bypass solts are required - the real problem is that because the T-stat is not sealed against the housing, coolant allways pumps through the radiator - It almost never comes up to operating temp. With the rubber seal installed the coolant is forced to the bypass until it warms up. - then when the T-Stat opens the radiator can now do it job as intended.

<font color="blue"> (
One thought that came to me, was providing a small bypass at the top of the seal. ie a v-notch or u-notch. Something that would prevent the possibility of becoming air bound, but not impact the warm-up time in any significant way. Thoughts? )</font>

Good point - the OEM stock T-Stat does not have a small hole or "jiggler" valve. However the Stant T-Stat does have the small jiggler valve to prevent "air lock"

<font color="blue"> (
PS: Up until my recent trips <font color="blue"> </font> (Dec & Jan) to Albuquerque, I would never of guessed that your weather would require any concern with warm-up time! /forums/images/graemlins/crazy.gif While no snow, there were a high number of days where it was warmer in NY! The almost constant wind added to the wind chill, too. That 5000+ foot elevation, makes a big difference.
)</font>

I live east of Albuquerque in the foot hills of the Manzano Mountains. ~ 7000 ' elevation. Gets real cold here - much more so than Albuquerque.
Our weather for the last seven years has not been "normal"
As of now it's been 4 months without a single snow flake. We should have been buried in snow a long time ago.

 

[JohnS]

</font><font color="blue" class="small">( I live east of Albuquerque in the foot hills of the Monzano Mountains. ~ 7000 ' elevation. Gets real cold here - much more so than Albuquerque.
Our weather for the last seven years has not been "normal"
As of now it's been 4 months without a single snow flake. We should have been buried in snow a long time ago.
)</font>

On one of the very few days off I had, went on the tram to the top of Sandia peak (10,000+'). It was 20 degrees with a 34mph wind! Beautiful view though. The ski slopes on the other side, looked like they were still awaiting their first snow flake! One good thing was the lack of any moisture, prevented the need to scrape the car windows in the AM.

 

[Ranch_Hand_Supp]

GuglioLS,

A really good job !! .... thanks for taking the time and sharing. I know you got some time in it.

The last....... 2005/ 08, 354LE's, TY395E1 engines that I received had an 57C thermostat in two of them I know. And the 10 extra I got for the parts self were 57C.

It has not been brought to my attention or have been able to find where I have a choice of thermostat in the tractors when I order them or when ordering replacements.

Thnaks,
Ronald
Ranch Hand Supply

 

[GuglioLS]

Bluechip, kidney(Paul), billbill1, JohnS, Harrygoodwrench, Ranch Hand Supp (Ronald),

Thank you very much for your positive comments and support. I appreciate them very much. My intention for the post was to share some knowledge for those in need and to hopefully benefit from it. It's my small way of giving back to all those I have received good advice and knowledge from.

If any of you ever plan on being in the Albuquerque area Please PM me - It would be my pleasure to meet with you some day.

 

[ToolManRick]

Right on GuglioLS. A nice post, informative and well done. My 204 seems to be heating up okay, but I do need to get another gauge. The original doensn't bottom out when cold and makes me a little suspicious of it's operating temperature, although it is very warm to the touch and yet never boils over. Again, a nice job on your posting.

 

[Bigbear]

Well GuglioLS, I don't have a Jinma, but my chinese tractor has the same problem and thank you for the post. We have replaced the t-stat with no difference, runs cold. I will check into this further and see if this is a fix for Fotons.
I would also like to see these other links that say the same thing, I can't find them, guess I just don't spend enough time on the computer. BEAR