Gauge says its overheating but its not
#1
Newbie
Thread Starter
Join Date: Feb 2012
Posts: 8
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
Gauge says its overheating but its not
My 2001 Jeep Cherokee Laredo's gauge spikes to the red and the dinging warning noise from dash goes off. But the Jeep is not over heating. I have no bubbling, No steam. no nothing. This happens when Im sitting still for about maybe 5 minutes. Then when I get going down the road the gauge goes back down to 220. What is going on????
#5
CF Veteran
Join Date: Aug 2009
Location: Hanover,Ont, Canada
Posts: 1,047
Likes: 0
Received 3 Likes
on
3 Posts
Year: 1991
Model: Cherokee
Engine: 4.o
Good chance that it is a small pocket of air, either a small leak (cooling sys low) somewhere or a small amount of combustion gasses entering the cooling system, keep an eye on it.....
Good luck
Good luck
#6
CF Veteran
Join Date: Nov 2009
Location: Dallas, GA 30157
Posts: 1,438
Likes: 0
Received 1 Like
on
1 Post
Year: 1999
Model: Grand Cherokee
Engine: 4.0
overheating while sitting still, but temp dropping while moving =
bad fan clutch (much of the time). Make sure the belt is tight too.
While sitting still the cooling system relies on the fan to draw air
through the radiator, thus cooling the coolant (like that?lol). Then while
moving, air is force though by the forward movement and doesn't need
the fan as much.
bad fan clutch (much of the time). Make sure the belt is tight too.
While sitting still the cooling system relies on the fan to draw air
through the radiator, thus cooling the coolant (like that?lol). Then while
moving, air is force though by the forward movement and doesn't need
the fan as much.
#7
Junior Member
Join Date: Feb 2011
Location: maine
Posts: 43
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1998
Model: Cherokee
Engine: 4.0 L
is it a grand cherokee
check to see if the electric fan comes on if not there is a fan modual that goes bad .. and will do what u r saying let me know what u find out..
Trending Topics
#8
CF Veteran
Join Date: Nov 2009
Location: The Republic of TEXAS
Posts: 8,172
Likes: 0
Received 14 Likes
on
14 Posts
Year: 1998
Model: Cherokee
Engine: 4.0L HO
One thing to remember, with a 50/50 mix and a properly funtioning 15-16 lb rad cap, coolant will not boil/steam at 260F.....but 260F is definitely overheating.
#9
CF Veteran
Join Date: Nov 2010
Location: In the middle of Minnesota!
Posts: 5,804
Received 99 Likes
on
88 Posts
Year: 1999
Model: Cherokee
Engine: 4.0
This. Always best to verify.
If you find that the spikes are not real, the primary suspect would be a sending unit problem (or wire/connector).
If the temperature truly is creeping up at idle ONLY (not while driving down the highway), then the fan clutch is the #1 suspect.
You need to get under this and resolve it quickly. Any type of overheating is very hard on your cylinder head and if you still have the factory 0331 head on your engine, they have a nasty habit of cracking between cylinders 3-4, where there is a casting defect, upon any overheating.
If you find that the spikes are not real, the primary suspect would be a sending unit problem (or wire/connector).
If the temperature truly is creeping up at idle ONLY (not while driving down the highway), then the fan clutch is the #1 suspect.
You need to get under this and resolve it quickly. Any type of overheating is very hard on your cylinder head and if you still have the factory 0331 head on your engine, they have a nasty habit of cracking between cylinders 3-4, where there is a casting defect, upon any overheating.
#11
Senior Member
Join Date: Jan 2011
Location: Upstate N.Y
Posts: 689
Likes: 0
Received 1 Like
on
1 Post
Year: 2000.1999,1996
Model: Cherokee
Engine: 4.0
Get yourself a real mechanical gauge and install it,Hesco sells a water neck with an extra port, you will be able to install the factory, and a aftermarket gauge all in one unit. Remember with an aftermarket gauge the more fittings used the less accurate your gauge will read.http://www.hesco.us/
Last edited by 413maxwedge; 02-24-2012 at 01:02 AM.
#13
Newbie
Thread Starter
Join Date: Feb 2012
Posts: 8
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
Thank you so much everyone! Im a girl and I do not know much about vehicles
This site is a very big help. I am having someone put a thermostat sensor on today. I will keep you posted!
This site is a very big help. I am having someone put a thermostat sensor on today. I will keep you posted!
#14
Member
Join Date: Apr 2009
Location: Tucson AZ
Posts: 123
Likes: 0
Received 1 Like
on
1 Post
Year: 1992
Model: Cherokee
Engine: 4.0
Mine just started that a couple days ago, when im driving its a cool temp but when i come to a stop the temp gauge rises way up, as soon as i take off it cools back down again. In october i installed a new water pump, t-stat, rad cap and hoses. So i should replace the fan cluch? Any certain cluch ? Or just a replacement one?
#15
Senior Member
Join Date: Jan 2011
Location: Upstate N.Y
Posts: 689
Likes: 0
Received 1 Like
on
1 Post
Year: 2000.1999,1996
Model: Cherokee
Engine: 4.0
Mine just started that a couple days ago, when im driving its a cool temp but when i come to a stop the temp gauge rises way up, as soon as i take off it cools back down again. In october i installed a new water pump, t-stat, rad cap and hoses. So i should replace the fan cluch? Any certain cluch ? Or just a replacement one?
Last edited by 413maxwedge; 02-24-2012 at 09:56 AM.