need block heater for 1540 what size hole

[case310350]

Block heater is bad on my 1540, its tucked way back. can anyone tell me what size it is? any recommendations on replacement?

Any tips on replacing it, should it pull right out?

 

[JWR]

To be up front about it, I prefer the type of heater that goes in-line with your radiator hose. Most of them are fairly simple with a heating coil and thermostat. The only hangup is usually finding a section of the lower radiator hose with enough spare space around it to cut it in half and insert the heater. I ran them in VW diesels for years and in those days found them at Sears. Much easier compatibility-wise than block heaters, plus I like the idea of warming up the entire engine and close-in parts by way of water flow.