coolant flush prob
11-08-2009, 09:01 PM
#16
Seasoned Member
Thread Starter
Join Date: Jul 2009
Location: Bremerton
Posts: 398
Likes: 0
Received 0 Likes
on
0 Posts
Year: 87
Model: Cherokee
Engine: 4.0
I have no idea. My ideas are either the radiator or the gauge is reading wrong. When I stopped I felt the radiator and it was cool and the hoses where warm but not 280*.
11-08-2009, 09:28 PM
#19
Member
Join Date: Mar 2009
Location: Bloomington, IN
Posts: 165
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1999
Model: Cherokee
Engine: 4.0
Yea most of what above is correct. I have never done a flush like that, I do not see a reason unless you think you have a blockage. But if you want to get the tap water out with out pulling the block plug(which I would not do) Then just add your coolant mixture till you start getting that out instead of clear water.
11-09-2009, 08:54 AM
#21
Member
Join Date: Mar 2009
Location: Bloomington, IN
Posts: 165
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1999
Model: Cherokee
Engine: 4.0
ahh, fair enough I guess lol. I just figured that if it wasnt good to have tap water in your system, it would be best to get it all out. But I guess if you dilute it enough you wouldnt have a problem.
Thanks for the answer!
Thanks for the answer!
11-09-2009, 11:01 PM
#22
Seasoned Member
Thread Starter
Join Date: Jul 2009
Location: Bremerton
Posts: 398
Likes: 0
Received 0 Likes
on
0 Posts
Year: 87
Model: Cherokee
Engine: 4.0
Today messed with it some more. Pulled both the top and bottom hose stuck the hose in a flushed. Water did come out although I went to drive it a little and bam the gauge read 260*. So I shut it off and what do you know the motor was still pretty cool. Any ideas?
11-09-2009, 11:17 PM
#23
Senior Member
Join Date: Jun 2009
Location: Central Pennsylvania
Posts: 670
Received 0 Likes
on
0 Posts
Year: 1989
Model: Cherokee (XJ)
Engine: 4.7 H.O.
bad sending unit? Faulty Gauge? Start by testing resistance from the sending unit, sometimes even new ones are bad.
11-09-2009, 11:31 PM
#24
Senior Member
Join Date: May 2009
Location: Middlesex County CT
Posts: 559
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1993
Model: Cherokee
Engine: 4.0 H.O
does the heat work? If not then you have air trapped or have not added enough coolant and nothing is circulating at all. sometimes turning the heat on and opening the valve to the heater core gets the air moving and out of the system.
11-09-2009, 11:57 PM
#25
Seasoned Member
Thread Starter
Join Date: Jul 2009
Location: Bremerton
Posts: 398
Likes: 0
Received 0 Likes
on
0 Posts
Year: 87
Model: Cherokee
Engine: 4.0
One of my thoughts was the gauge so I went and bought an aftermarket and the sensor is to big for the existing hole. Anybody have this problem?
11-10-2009, 12:07 AM
#26
Senior Member
Join Date: May 2009
Location: Middlesex County CT
Posts: 559
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1993
Model: Cherokee
Engine: 4.0 H.O
The stock sensor probably uses 1/8" NPT pipe threads and the aftermarket ones I have seen use 1/4" NPT threads. go to the hardware store and see if you can find an adaptor. bring both sensors to be sure of the thread size/pitch.
11-10-2009, 12:24 AM
#27
Seasoned Member
Thread Starter
Join Date: Jul 2009
Location: Bremerton
Posts: 398
Likes: 0
Received 0 Likes
on
0 Posts
Year: 87
Model: Cherokee
Engine: 4.0
Yeah 1/8in for the stock and I think its more like 3/8in for the new one. Problem is I would have to use a 1/8in closed nipple which the sensor wont fit through. Was thinking maybe putting a tee inline with either the top or bottom rad hose.
01-18-2010, 11:28 AM
#28
Seasoned Member
Join Date: Aug 2008
Posts: 298
Likes: 0
Received 1 Like
on
1 Post
Year: 2000
Model: Cherokee
Engine: 4.0L
Where is the temp sensor located?
If radiator is cool but engine is HOT then you are not circulating the coolant. Blockage, Pump, collapsing hoses etc....
If the temp gauge is just wrong?? Then a new sending unit will correct.
What is the temp when it is "Hot" Do you have the Aux electric fan as well as the clutch fan. Either of those could be a problem but will lead to the radiator being HOT..not cool...
How long does it take to get Hot?
If radiator is cool but engine is HOT then you are not circulating the coolant. Blockage, Pump, collapsing hoses etc....
If the temp gauge is just wrong?? Then a new sending unit will correct.
What is the temp when it is "Hot" Do you have the Aux electric fan as well as the clutch fan. Either of those could be a problem but will lead to the radiator being HOT..not cool...
How long does it take to get Hot?
Thread
Thread Starter
Forum
Replies
Last Post
sluger17
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
9
07-08-2023 07:08 AM
jmsummers2012
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
53
04-30-2021 02:35 PM
shelby5041
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
8
07-20-2016 04:38 PM
tleed
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
3
10-04-2015 01:20 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)