180* thermostat

V

ve6nn

NAXJA Forum User

Location

YUMA Az/Alberta Can.

• Oct 1, 2004

• #1

I've seen ads in some of the mags for a 180* thermostat for the 4.0L. Anyone tried this and if so does it help keep temp down in engine compartment.

I will be spending the winter months in Arizona. Do I need to add a transmission cooler to my XJ? If so how is it tapped in?

 

Starboard M

NAXJA Member

NAXJA Member

Location

Lafayette, CA

• Oct 1, 2004

• #2

I have a 180* from the dealer. Most people think that thats a beter Tstat because it has the hole in it for the flow. Depending on whay year your XJ is, you may already have a transmission cooler. My 89 came with one stock from the factory. Do all years have this? Hope that limited info helped.

 

J

junkxj

NAXJA Forum User

Location

boone

• Oct 1, 2004

• #3

From my experiance the 180 theromstat dosnt make the engine run cooler, only fluctuate temps. I have used the 180 and stock, I run the stock. Just my experiance though.

 

E

evilpresence

NAXJA Member #983

Location

Arnold, MD

• Oct 1, 2004

• #4

I've always understood that 4.0's are supposed to be at 210*. It's the air circulation that needs to be adjusted not the thermostat.

 

J

jjvande

NAXJA Forum User

Location

Albuquerque NM 505 burque

• Oct 1, 2004

• #5

winter months in AZ arent that hot...

 

jrsxj98

DILIGAF

Location

Crawlorado

• Oct 1, 2004

• #6

Stay with the stock one. I ran a 180 and the XJ actually ran worse. I talked to my mechanic and he said that they are suppose to run a 210, or the computer thinks that the engine is running to cool, so it runs rich, and kills you milage. Lets face it most of use need all the help we can get in the MPG department.

 

V

ve6nn

NAXJA Forum User

Location

YUMA Az/Alberta Can.

• Oct 4, 2004

• #7

Thanks for the info. Will leave well enough alone.

 

G

Gojeep

NAXJA Forum User

Location

Australia

• Oct 4, 2004

• #8

jrsxj98 said:

Stay with the stock one. I ran a 180 and the XJ actually ran worse. I talked to my mechanic and he said that they are suppose to run a 210, or the computer thinks that the engine is running to cool, so it runs rich, and kills you milage. Lets face it most of use need all the help we can get in the MPG department.

Click to expand...

Thats right and the you should have a 195* one in there. Any less and the computer will stay in open loop mode as it is waiting for it to warm up enough! What this means is that the o2 sensor is not even read at all !!