Blair Williams
NAXJA Forum User
- Location
- DSM, Iowa
I'm running my '85 2.5L XJ and it needs a new thermostat but there are several temperatures available to put in...i'm not sure which to put in. what came stock in it? 160? 180?
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Which temp. thermostat should i get?
- Thread starter Blair Williams
- Start date
XJ91
NAXJA Forum User
- Location
- G'Nagiwanka
fasty said:
2nd that.
RichP
NAXJA Forum User
- Location
- Effort, Pa
XJ91 said:
3rd that, make sure the little hole in the flange is at the 12 O'clock position, use the OME gasket too
FrankDV1
NAXJA Forum User
- Location
- Southern NJ
I just changed mine from 195 to 180. Also increased the coolant mixture to 65/35 instead of 50/50...more coolant. Also did a flush...real dirty. Always felt 210 was to hot for my '97 XJ, 4.0 inline 6. My check engine light came on after all that, but went out after 36 hours or so. Any possible problems with this mod? Thanks.
PS - the old tstat had a ball in the top of it(flange). New one doesn't...problem?
PS - the old tstat had a ball in the top of it(flange). New one doesn't...problem?
Beached Bones
NAXJA Forum User
- Location
- Winnipeg
The T-stat should have a ball valve or a hole in the 12 o'clock position to help get air our of the system. You can drill a small hole if it's not there.
akorna
NAXJA Forum User
- Location
- Virginia Beach, VA
Actually water is a better conductor of heat than antifreeze, so you will likely run cooler with 65% water, 35% antifreeze than the other way around. Agree that the themostat should have a 1/16" hole drilled. What are your operating temps now?
- Location
- La Habra, CA
FrankDV1 said:
The 4.0 is supposed to run at 210 degrees. That may sound high compared to other engines, but it's normal for the 4.0
Jeepster4wd
NAXJA Forum User
- Location
- socal
yea go with a factory 195 Tstat. I went with a 180 and switched back to stock tstat runs much beter with the factory Tstat. For best fuel economy u need it to warm up as quickly as possible.
FrankDV1
NAXJA Forum User
- Location
- Southern NJ
About 205 degrees. "Check Engine" light went off sooner this time...less than 15 hours after replaced water pump. Thanks for the info.
Dr. Dyno
NAXJA Forum User
- Location
- Al Ain, UAE
Blair Williams said:
If you live in a temperate climate, go for the stock 195* t'stat.
If you live in an Arctic climate, go for the Robertshaw 205* t'stat.
If you live in a hot desert climate, go for the Robertshaw 180* t'stat.