cooling issues
Post Fiend
Joined: Nov 2004
Posts: 5,638
Likes: 1
From: Manitoba
Diesel engine coolant temperature at the top of the radiator where hose attaches after high rpm or under load condition for 20 minutes should be (195-237*F) 91-114*C nice time to have a temperature reading point and shoot tool.
Try cleaning the rad exterior... pay special attention to the area between the a/c condenser and coolant rad..... use air first to clean debris then water.
Try cleaning the rad exterior... pay special attention to the area between the a/c condenser and coolant rad..... use air first to clean debris then water.
Post Fiend
Joined: Oct 2007
Posts: 10,501
Likes: 5
From: Faibanks Ak.
This seems warm to me if I remember my fan kicks in at 205 or a little more and she starts cooling down to about 200 when under a hard pull, empty stays around 190 all the time. What rpms are you running when pulling.
Cargo Master
Joined: Feb 2008
Posts: 3,409
Likes: 1
From: back in SE Iowa
mine runs on the o on normal typically but pretty much runs like dakotajeep explained how his runs.a little warmer with the a/c.if you do little stuff like flush the radiator change the cap etc. it might help as well
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Elder User
Joined: Dec 2007
Posts: 854
Likes: 0
From: woodville, tx
completly flushed the radiator and put the correct thermostat in about 2-3 months ago, i cant tell you about the fan because of how noisey the truck is to begin with. there are times when you take off and it is super loud comming from the front of the truck and then you may go days w/o hearing the roaring noise. the noise changes with speed and not with motor speed. and put a new cap on yesterday, b4 i made the trip
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Post Fiend
Joined: Oct 2007
Posts: 10,501
Likes: 5
From: Faibanks Ak.
The roar of the fan is very noticable when it locks up should come on by temp not speed, at highway speeds when it comes on it is very noticable even with these noisy trucks.
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Laughing Gas
Joined: Aug 2007
Posts: 1,132
Likes: 0
From: Baldwin, ND
Thats weird because I have never noticed my fan ever. Maybe I dont have a calibrated ear. I need to ride in one of your trucks to hear it and see if mine does the same.....
Anyone close to Manhattan, KS?
THad
Anyone close to Manhattan, KS?
THad
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Elder User
Joined: Dec 2007
Posts: 854
Likes: 0
From: woodville, tx
am starting to think that while a buddy of mine is working at a ford dealership, i might need to replace a few parts. he looked up the cdr and said it was 40 for him to get it and nearly 70 for me 2. i think i may give them a lil business...
Junior User
Joined: Apr 2006
Posts: 74
Likes: 0
From: Pottstown, PA
230* is about the max temp you want to run, and not for very long. Regular motor oil starts to break down at around 250*(Synthetic is around 400 I think). Typically your engine should run around 200, give or take a little either way. Most likely causes for running hot that I've seen are blockage in the radiator, bad fan clutch, and worn water pump impeller. To check the fan clutch, drive it around til it's up to temp. Right after you shut the engine off, while it's still hot, try to spin the fan by hand. If it spins freely the clutch is bad. If it doesn't move then it's locked and working fine, and your water pump may be bad.
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Elder User
Joined: Dec 2007
Posts: 854
Likes: 0
From: woodville, tx
true, everything on this truck has been 1987 original. and all are slowly failing. i know the water pump is circulating by watching the water flow through the radiator when up to temp.
Post Fiend
Joined: Oct 2007
Posts: 10,501
Likes: 5
From: Faibanks Ak.
You don't need any trained ear here just one that works even barely when the fan comes on it sounds like an airplane taking off.