Speedhut CJ speedo gauge temp warning

bigwalton

Picture cravin' AK Postal nut
Staff member
SOA Member
City
Dexter
State
MI
#1
After my cooling fan failed in Moab and I replaced it with a temporary and sub-optimal alternative I was running hot and tried to figure out the temperature where the warning light in the CJ speedo turns on, off and what is the “H”.

I couldn’t find those temps listed anywhere, so I emailed them. Here’s the reply:

  1. Temp warning light comes on at 220.
  2. Temp on H is 260
  3. Light goes off when temp is below 200
FYI
 

tower210

Scrambler Junkie
LIFETIME
CJ-8.com Member
City
Olathe
State
KS
#2
I wonder if they can reprogram them?

The 4.0 comes with a 210F stat. If I remember and really wants to live there; bugs me a bit that it is always about 2/3 to hot....
 

bigwalton

Picture cravin' AK Postal nut
Staff member
SOA Member
City
Dexter
State
MI
#3
I wonder if they can reprogram them?

The 4.0 comes with a 210F stat. If I remember and really wants to live there; bugs me a bit that it is always about 2/3 to hot....
I’ll all but guarantee that they can. I need to look that up. I’ve had the wrong thermostat in my 4.0 if that’s true.
 

bigwalton

Picture cravin' AK Postal nut
Staff member
SOA Member
City
Dexter
State
MI
#5
Asked and found out that this is not something they currently customize. I pointed out that the normal operating temperature of the 4.0 is 210 so something like 235/220 is a better option for those of us running it.
 

Rosco1974

Scrambler Junkie
LIFETIME
CJ-8.com Member
City
West Haven
State
UT
#6
Does the gauge pull from the coolant neck or the head? A 195 degree t-stat will read 210 @ the head and a warning @ 220 seems good.
 
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