Temp Sender adapter help
#1
Seasoned Member
Thread Starter
Temp Sender adapter help
So a while back I snapped my temp sender off in the head and could not drill it out so I recently picked up an adapter that goes in-line with my upper radiator hose. I got it wired up and it works. It'll go up to 210 but it seems when the Thermostat opens, it will quickly jump to the red even though the engine isn't overheating. What could be causing this to happen? Knowing my luck, it is something super simple.
#2
Member
Join Date: Dec 2012
Location: Vancouver, BC
Posts: 200
Likes: 0
Received 5 Likes
on
4 Posts
Year: 1993
Model: Cherokee
Engine: 4.0 HO
You need a ground on the body of the sensor, in the factory location it grounds through the thermostat housing. You might find a tapped hole on the glowshift adapter you can run a little wire to ground with.
#3
Seasoned Member
Thread Starter
well when i first installed it, the sensor wouldn't read at all. It only started reading anything when i wrapped wire around it and grounded it to the compressor. Was wondering if maybe it's also somehow reading the temperature of the adapter itself.
#4
Member
Join Date: Dec 2012
Location: Vancouver, BC
Posts: 200
Likes: 0
Received 5 Likes
on
4 Posts
Year: 1993
Model: Cherokee
Engine: 4.0 HO
Good to hear about the grounding wire.
As far as it reading the temperature of the housing it's similar to the factory mounting in that it's screwed into an aluminum housing and the probe should be immersed in coolant unless you have an air pocket in this location as it is likely the highest point in the system. The air pocket might explain the sudden needle movement when the thermostat opens.
As far as it reading the temperature of the housing it's similar to the factory mounting in that it's screwed into an aluminum housing and the probe should be immersed in coolant unless you have an air pocket in this location as it is likely the highest point in the system. The air pocket might explain the sudden needle movement when the thermostat opens.
#5
Seasoned Member
Thread Starter
Good to hear about the grounding wire.
As far as it reading the temperature of the housing it's similar to the factory mounting in that it's screwed into an aluminum housing and the probe should be immersed in coolant unless you have an air pocket in this location as it is likely the highest point in the system. The air pocket might explain the sudden needle movement when the thermostat opens.
As far as it reading the temperature of the housing it's similar to the factory mounting in that it's screwed into an aluminum housing and the probe should be immersed in coolant unless you have an air pocket in this location as it is likely the highest point in the system. The air pocket might explain the sudden needle movement when the thermostat opens.
#7
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,971
Received 1,559 Likes
on
1,263 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
I don't think the upper hose is a good location for that sending unit.
Trending Topics
#8
Member
Join Date: Dec 2012
Location: Vancouver, BC
Posts: 200
Likes: 0
Received 5 Likes
on
4 Posts
Year: 1993
Model: Cherokee
Engine: 4.0 HO
I agree with cruiser. If you snapped off the existing location, just replace the thermostat housing with a new one. Fairly easy fix.
I imagine you've verified the temperature with an IR gun or other thermal measurement device?
I imagine you've verified the temperature with an IR gun or other thermal measurement device?
#9
Seasoned Member
Thread Starter
I have and it's reading a lot lower than the gauge is of course. Also the temp sender goes into the back of the head, not the thermostat housing. You're probably thinking of the temp sensor that goes there for the computer itself to read.
#10
Seasoned Member
Thread Starter
Thread
Thread Starter
Forum
Replies
Last Post
cbears85
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
1
04-30-2016 09:56 PM
LuvmyJeep
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
41
10-28-2010 04:46 PM
kamonjj
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
25
04-13-2010 07:51 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)