Hey guys my 1990 7.3 idi n/a is having some cooling problems if you will. So I replaced the radiator and the top and bottom hoses and the t stat with a motorcraft one and rebuilt the oil cooler. So when I first start it up and drive it to work it never get above 140 going down hills and everything. But when I go home pulling the hills it get up to temp. Anything I can do to get it to warm up in the morning?
7.3 idi cooling system problem
- Thread starter Fordfan90
- Start date
Where is your temp sender?
Are you wanting the coolant temps up for heating the cab in the cooler mornings?
You can cheat and plug the block heater to a timer and have it set to come on a couple of hours before you usually leave. A old piece of cardboard in front of radiator works too.
Heath
Are you wanting the coolant temps up for heating the cab in the cooler mornings?
You can cheat and plug the block heater to a timer and have it set to come on a couple of hours before you usually leave. A old piece of cardboard in front of radiator works too.
Heath
79jasper
Chickenhawk
I assume you're running a real gauge?
At first thought, I would say sounds like your fan is staying locked.
What are ambient temps is he morning vs evening?
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At first thought, I would say sounds like your fan is staying locked.
What are ambient temps is he morning vs evening?
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Real gauge is in the warning light spot and I have the dash gauge still working and it never get to the n on normal in the morning. The morning temp is about 45 right now and about at 5 it's 57 or so. Yea I want it for the cooler mornings.
79jasper
Chickenhawk
I would look at the fan clutch.
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If you don't find anything wonky with the fan clutch (you can hear it with it's locked...), I'd just get a plug timer, set it to turn on 2 or 3 hours before you leave for work, and plug the block heater in. Still won't be hot enough to warm the cab immediately, but it will start blowing warm air sooner.
Heath
Heath
the only thing I have found will make these trucks warm up faster is e-fans. only because they wont be blowing cold air over everything. also there is about 8 gallons of coolant to warm up.
maybe the heater core is plugged up.
maybe the heater core is plugged up.
I don't think I've heard this kick the fan on? I just know when I did the head gaskets on it couple weeks ago. The fan was really hard to move then would hit an easy spot when spinning it by hand.
Do you see any oil or buildup around the center of the fan near the snail spring piece? Pretty much sounds like you need to replace it.
Looks like a little bit I'll pull it in the shop. Works slow for the day.
IDIBRONCO
IDIBRONCO
Maybe your thermostat,s sticking open. I know last December 17, it was in the low single digits with a 25 to 30 mph north wind. I drove my truck north into the wind for about an hour and a half. My temperature stayed right around 190.
How long is the morning commute?
About 20mins sometimes longer depending how traffic is. My other one never had a problem getting to temp so I don't know why this one is? I've replaced the t stat twice with motorcraft ones.
And you know it's only really around 140F due to not only the gauge but the lack of heat in the cab too? On the ride home pulling the grades,when you see your gauge run up to normal 190-210F,you can turn the heat on and get roasted out with ease?
Yes it get hot pretty fast. But the blower motor doesn't seem to blow as fast it should.
