Jinma Operating Temperature – SOLVED !!!!

[GuglioLS]

This is not a Retread of Jinma Thermostats - this is new and enlightening information that I have not seen – unless I am blind (my wife thinks so) /forums/images/graemlins/cool.gif

Ok, I have read many if not all the posts here and elsewhere about Jinma thermostats and various attempts to fix it….Some have installed higher temp t-stats and ….. Same problem, engine will not come up to operating temperature, some say that the radiator is “Too Big” for the size tractor etc. etc. etc…

Please carefully see and read the attachments to find out why they don’t work and how to really fix the problem once and for all period - it’s actually very simple…..

I must also say the Jinma thermostat in itself functions properly – it’s the housing that it is enclosed in that is the issue - again there is a very simple explanation and fix.

My Tractor: 2005 Jinma 354LE, Engine: Y395 E-3 (EPA)
The stock T-stat: 57* c (134.6* f)
I want it to warm up faster and run hotter

Purchased Stant brand T-Stat # 13548 which is 82* C (180* F)

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 to seal the gap between the top of the T-Stat and housing that it is enclosed in.

 

[GuglioLS]

A picture is worth 1024 words.

 

[GuglioLS]

I used my lathe to turn down the Stant T-Stat flange to 2 – 9/16”.
The lathe was purchased with the money I saved by buying a Jinma.
You could also carefully grind it down.

 

[GuglioLS]

Some details of the assembly.

 

[GuglioLS]

After about 15 minutes (ambient temp 15* F) my Jinma has that “Warm and Fuzzy” feeling. /forums/images/graemlins/grin.gif

 

[bluechip]

well done! very nice doucmentation. You may be just the guy to write the long awaited service manual!

 

[greg_g]

I vote with your wife; this is not new information. Similar to the many reported cases of the wrong size system fuse, several folks have reported discovering the wrong thermostat in their Chinese tractor. I recall at least two mentioning the 57C variant. Your 354 should have been delivered with an 80C thermostat installed in the first place.

Point in fact; stock Chevy trucks typically come with a 195F thermostat. Aftermarket performance chips generally require changing DOWN to a 160F thermostat, extreme cases drop to a 140F. Simplified conclusion is that an EPA engine should typically run hotter than one (re)tuned for performance. Hence; the wrong thermostat was installed in your tractor in the first place.

//greg//

 

[kidney]

GuglioLS, I for one appreciate your post. I do not own a Jinma but I have a Kama which is slow to warm up. Any information new or not that can help others I hope is welcomed here. I will be looking into mine soon.Thank you for your post and keep up the good work. Paul

 

[greg_g]

</font><font color="blue" class="small">( I have a Kama which is slow to warm up. Any information new or not that can help others )</font>
Mine too, but not unusually so - since diesels are slow to rise to operating temperatures anyway. Slower than their gasoline counterparts anyway. Plus, the colder the ambient air temperature (and the lighter the work load), the slower a diesel will be to achieve optimum operating temp.

Some owners have also reported finding the wrong diameter thermostat installed, to the point where it flops around in the housing. One fella even found his thermostat setting at a 90 degree angle; so loose that the coolant flipped it perpendicular to the flow. Some found no gasket. In both cases - when the thermostat is not given an opportunity to STOP the flow - the coolant will simply not heat properly.

Pull your housing for a close up and personal examination of what's actually going on with your KAMA.

//greg//

 

[jaroban]

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. When I removed the thermostat I found teflon tape. I replaced the thermostat and have not worked the tractor hard again . WE have had no rain until this week in five months(Texas), No need to mow.