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Proper temperature range

Tiny
SPITNHIT
  • MEMBER
  • 1975 JEEP CJ5
  • 4.2L
  • 6 CYL
  • 4WD
  • MANUAL
  • 89,000 MILES
What are your thoughts on temperature rating for a thermostat in my vehicle?
Through Internet research, it seems the 258ci (4.2L) should run between 190-210*. Should I run a 180* thermostat?
Friday, June 24th, 2016 AT 3:45 PM

1 Reply

Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,005 POSTS
The AMC Service Manual says to use a 195 degree stat

I have done that all along (since 1981- 6 CJ-5s) No problems!

I have been doing this for a long time too, look at the end of

https://www.2carpros.com/questions/1989-jeep-other-challlenge-engine-overheating-rapidly-fluctuation-temperature-l/page/2

The 195 gives your heater/ defrost more heat, I have the OEM heater and my own "Sahara Breeze" (uses cooling system water too), two heaters are better than one and temperature is important!)

The Medic
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Friday, June 24th, 2016 AT 4:30 PM

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