7070 overheating

I’ve read several posts on here with issues of 7060and 7000 series overheating., And tried all the fixes
I have a 7060, low hour tractor. Never had a working temp gauge until about a week ago. It always ran around 200 with a laser thermometer however it started getting worse.   The previous owner had removed both stats.   It also had no foam around the rad.   I put in new 180 stats, complete foam kit, belts tight. Rad professionally rodded , new water pump, timing at 18 degrees.    After putting in the thermostats it overheats within minutes baling hay.   It will run about 200 at idle but shoots sky high when running at rpm. I’m stumped and desperately need the tractor. Any help would be greatly appreciated. Thank you!!!

Do you have the thermostats installed with the correct part in the block? 

Sounds to me like you've purchased a problem child that has had issues long before you came on the scene. You shouldn't be using the tractor until :  You can run the engine wide open throttle for 30 minutes to establish an operating temperature and that temperature should be 180 degrees !!! Verfied with a heat gun AND your new temp gauge !!   Until you get to this point, you have no business using the tractor.  Injection pump static timing may very well be at 18 degrees BTDC, but does it advance to 36 degrees BTDC when running???  It MUST do this. It cannot run cool if the timing isn't 36 degrees BTDC when running wide open.  I'm having a hard time believing it runs an actual 200 degrees at an idle.

A couple of years ago, I had a Caterpillar C-9 engine (on a quarry lagoon pump) that had a severe overheating problem. Engines in this kind of use are known to get pond water dumped into the radiator over their service life instead of good quality coolant. Long story made short, I wound up replacing the engine with a reman. The coolant passages between the cylinder block and the head were plugged enough that coolant could not flow properly. It would get hot just running at wide open throttle over a period of 20 minutes or so and the heat gun was giving all sorts of stupid illogical readings that shouldn't have been.

Have you checked for good fuel flow to the pump? A clogged filter will make mine run hot. Also good clean air filters help, so might check there also...
I'm sure it's a dumb question, but how do you check to know what the timing is when the pump is running? -- edited to say I looked up diesel timing lights... Didn't know they existed. I've wondered about the differences in sound and apparent horsepower in some of my similar tractors and would be interesting to see how they compare...

Edited by Adam Stratton - 27 Jun 2022 at 10:27pm