Direct Immersion Heaters
Note: In-block heaters are complete with 2-wire w/ground 6 foot HPN cord and plug. For cord replacements or “Y” thermocord energy saver, please reference page 12.
Heat Shield Required
Oil Heater Thread Size*
Mack - continued
E6 engines “smooth bore” from 1981 on
threaded freeze plug opening not produced after‘81 END 465, 711, EN438, 504, 707, 673, 675, 676 (1957 through 1981)
Except E-Tech water pump mount
E9, ENDT865, 866 and 1000 seriesV8 engines
Use two heaters
D2840 D2842 D2848
Mounts in the freeze plug opening.Smooth opening design.
Mounts in any threaded freeze plug opening
Mounts in the plate in either the front or rear face of the block in the water jacket passage. For 2002 engine – mounts in rear face of block.
Threads into the 3/4”NPT opening on each side of the block
Replace“football shaped”plate in lower water pipe on right side of engine
Replace 3 bolt plate on left side of engine. May require adapter if 3 bolt opening is not available on engine.Consult customer service.
V800 (796 CID)
INLINE 6 CYLINDER — all series — 312, 360, 414, 436, 466 & 530
PER-751FP INTA-121 FR151-001
PER-752FP INTA-122 FR152-001
750 1250 1500
6.9L & 7.3L V8 diesels through 1993
FC101-PY1 or FC601-501
7.3L & T444 all series
3/4”NPT threaded opening in the block
No replacement cord available.Mounts in a freeze plug above starter
Mounts in the frost plug on the left side of the engine. Fits all series of these engines.
Threads into a 1”NPT opening in the oil cooler bonnet
Right side rear.Replaces frost plug.
9.0L — V8 diesel
Mounts in a freeze plug
Onan — See Cummins “A” Series
If supplemental oil heating is desired, this column gives the correct thread size in oil pan. See NOTE on page 11.
Kim Hotstart Manufacturing Company, Inc.
P.O. Box 11245
Spokane, WA 99211-0245