99 engine takes longer to warm up after cooling repairs?

jeeperguy21

NAXJA Forum User

Location

Syracuse, UT

• Jan 8, 2010

• #1

On New Year's, I finally replaced my leaking water pump with an OEM replacement pump & a 195 degree thermostat on my 99 XJ. Ever since I have done that, it seems like the heep takes a lot longer to get up to operating temperature.

It used to heat up really quick to 210 degrees. Now it seems to take much longer and it rarely gets up to 210. It now gets up to between 190 and 210. Since I didn't replace the pump with a "high-flow" pump, and the thermostat is direct replacement, what might cause this to happen?

 

L

lorax81

NAXJA Forum User

Location

St. Helens Orrygun

• Jan 8, 2010

• #2

you fixed the problem

and this thread needs a bunny

 

Fastdemise

NAXJA Forum User

Location

Beaverton, OR

• Jan 8, 2010

• #3

I installed a Mr. Gasket high flow thermostat and turbo city high flow housing and now sit at about 197 at highway. Nothing wrong with it. But for the winter season I taped up 3 of the 7 holes in the header panel and now it's heats up fairly quick and I still stay at around 200.

 

ILLXJ

NAXJA Member

NAXJA Member

Location

Louisville, IL

• Jan 8, 2010

• #4

I blocked about 2/3 of the rad. with cardboard. Heats up faster & runs between 200-210. JIM.

 

B

birchlakeXJ

NAXJA Forum User

Location

Melrose, MN

• Jan 8, 2010

• #5

Shouldn't be water pump related. I have seen variance in thermostat operation related to this. You could try a different stat if you want (I like stats from JEEP) or as long as it is getting to proper operating temperature, you may just accept this as a "characteristic" instead of a problem.

Verifying actual temperature of the coolant with an infrared point and shoot laser thermometer pointed at the thermostat housing is never a bad idea.

 

W

winterbeater

NAXJA Forum User

Location

Royal Oak, Michigan

• Jan 8, 2010

• #6

Being that the tstat should be closed until it reaches 195 or so, I would say that the tstat is letting coolant circulate throuhg the radiator too soon.

 

ehall

NAXJA Member

NAXJA Member

Location

Southern Maryland

• Jan 8, 2010

• #7

Mr. Gasket tstats bring the suck

 

ParadiseXJ

NAXJA Forum User

Location

Paradise, CA 95969

• Jan 8, 2010

• #8

Fastdemise said:

... But for the winter season I taped up 3 of the 7 holes in the header panel and now it's heats up fairly quick and I still stay at around 200.

Click to expand...

I like that idea, effective but doesn't look like a chunk of cardboard.

That goes on this weekend.

 

jeeperguy21

NAXJA Forum User

Location

Syracuse, UT

• Jan 8, 2010

• #9

Very good responses. Thanks for your ideas.

 

joe_peters

NAXJA Forum User

Location

Grants Pass, OryGun

• Jan 9, 2010

• #10

I absolutely prefer the Stant SuperStat Premium 195 degree thermostats over all others.