Is the fan still working?
The coolant level is to the bottom of the cap. The level may have dropped
when you turned on the heat as it would have circulated into the heater
core.
Is the hose to the thermostat very hot? If not, the thermostat is installed
the wrong way.
-----Original Message-----
From: KCDak [mailto:KCDak@JnJAnderson.com]
Sent: Monday, July 08, 2002 4:39 PM
To: dakota-truck-moderator@bent.twistedbits.net
Subject: DML: Re: I need serious help... (Update)
Well here is how today has gone. This morning, I went and got the stuff to
flush my cooling system and also got a new radiator cap. When I got home I
started the radiator draining while I removed the upper and lower fan
shrouds. Once these were removed, I sprayed out the radiator from the
backside the best I could, however, I did not remove the electric fan so I
sprayed around and through that the best I could. Next I removed the 195
t-stat and then ran lots of fresh cold water through the system with the
t-stat out and the radiator drain open. I then put the Robert Shaw 180
t-stat back in that I had removed about a week or so ago. I put the fan
shrouds back together, and then did a chemical flush on the system. After
that was complete, I did a back flush to make sure that everything was well
cleaned out (I know, probably overkill). I then filled the system with
fresh 50/50 mix of anti-freeze and water, added a new radiator cap, and then
finished by driving it about 5 miles. When I got back, I bled any air that
was in the system, topped off the coolant, and then drove it about 25 miles.
I came home, ate lunch, and then went for a 100-mile drive to fully test it.
The first 85 miles or so was completely highway miles at about 70-75 mph and
the engine seemed to run perfect. The outside temp here is around 95
degrees with relatively high humidity. For the most part it ran around
195-205. Once I exited the highway and was stopped at a stoplight I noticed
that the temp started to rise to around 240 or so. I turned off the A/C and
turned on the heat. That seemed to help. The temp came back down around
210. I turned the A/C back on and the temp rose once again. I then left
the heater on for another few miles while driving through neighborhoods and
then temp would rise again. This time I turned the A/C back on and the temp
dropped, but not by much (still above 210). I turned the heat on one last
time and there was no heat coming from the system and the temp didn't
fluctuate. When I pulled in my driveway, I turned the A/C back on and set
there for a couple of minutes and the temp just stayed right around 240.
Any ideas? None of the hoses seem to have collapsed. I can't find any
leaks, however when the engine cools off and I open the radiator cap, it
appears that I need to add more coolant. . Is that normal, or should it be
full to the cap? What should I try next?
Thanks for all your help,
Jason
'00 Sport Quad 4.7L 4x4 3.55, Autolite 3923's, BFG AT T/A,
IAT Adjuster, 360° Air Intakez, Robert Shaw 180° thermostat,
Line-X sprayed bed and nerf bars, Roll-n-Lock tonneau
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