John Deere

   / John Deere #11  
Last edited:
   / John Deere #12  
It’s a John Deere engine forty thirty nine
4039=4 cylinder engine manufactured in Dubuque, Mannheim or Saran factory. One should be able to remove a hex plug on LH(drivers side) & install a block heater part #DZ102076 similar to photo below.
 

Attachments

  • Screenshot 2025-10-29 053046.png
    Screenshot 2025-10-29 053046.png
    52.4 KB · Views: 4
   / John Deere #13  
Might be a matter of finding the right pipe plug to get an external water heater plumbed in to circulate cooling fluid.

Here is a schematic that shows such a plug (key #28) in the block linked to the JD parts site.


Another thought is to maybe contact this fellow who put a video up on his rebuild of a 4039 engine.


Or
4039 series engine & 3043 tractors do not share the same engine family but from viewing the last photo you posted the engine coolant heaters are located in similar locations. Model 3043D utilizes 1.6L Yanmar engine
 
Last edited:
   / John Deere
  • Thread Starter
#14  
4039 series engine & 3043 tractors do not share the same engine family but from viewing the last photo you posted the engine coolant heaters are located in similar locations. Model 3043D utilizes 1.6L Yanmar engine

Thanks
 

Tractor & Equipment Auctions

2012 John Deere 7230R (A55314)
2012 John Deere...
2007 FORD F-150 XL TRITON (A55745)
2007 FORD F-150 XL...
(APPROX 15) 2" X 6" X 20'- 3/8" THICK METAL TUBING (A54757)
(APPROX 15) 2" X...
2023 Stryker GN3614 36ft. 5 Ton T/A Gooseneck Flatbed Equipment Trailer (A51691)
2023 Stryker...
2011 MAGNUM PRODUCTS LIGHT PLANT/TANK TRAILER (A53843)
2011 MAGNUM...
2015 Ford Escape SUV (A55853)
2015 Ford Escape...
 
Top