Cooling system troubles - Diesel Forum - TheDieselStop.com
'99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the '99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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post #1 of 32 (permalink) Old 02-04-2019, 07:56 PM Thread Starter
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Cooling system troubles

Just replaced the water pump on my 2001 powerstroke all went well broke the coolant sensor ran to the parts store got another now started up let it run temp gauge never moved heater started blowing hot gauge still didn't move got another sensor still the same felt the upper and lower hoses and they were warm but not as warm as the heater hoses not sure what to do thanks in advance for your help.

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post #2 of 32 (permalink) Old 02-04-2019, 08:32 PM
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It takes quite some time to warm a 7.3 at idle. The part store sending units rarely work on our trucks. You need to get a genuine Motorcraft sending unit. Did you change the thermostat?


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post #3 of 32 (permalink) Old 02-04-2019, 08:38 PM
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Have you driven it much since refilling with coolant? There can be some air pockets in the system.


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post #4 of 32 (permalink) Old 02-04-2019, 09:20 PM Thread Starter
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Thanks for the info I'll order sending unit tomorrow and yes I replaced the thermostat with a parts store brand probably just order one from Ford thanks again I'll update if and when I get it going
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post #5 of 32 (permalink) Old 02-04-2019, 09:21 PM Thread Starter
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I drove it four miles into town and back and got super nervous with the heat gauge not working
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post #6 of 32 (permalink) Old 02-05-2019, 07:22 PM Thread Starter
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I now have a new motorcraft ect and thermostat just got back from test drive still no temp gauge

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post #7 of 32 (permalink) Old 02-05-2019, 09:12 PM
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I think you may have air trapped in the system. Try running without the degas cap on for a few minutes and look to see if the level drops. You could also try disconnecting the upper radiator hose and see if you are getting any flow out of it while it is running.

2002 F250 Super Duty Crew Cab 7.3L Lariat 2WD 131,000mi; 4in turbo back custom exhaust, Garrett GTP38R turbo, Riffraff intercooler boots, Dorman Up-Pipes, Ford Severe Duty AIS, 31 row 6.0 transmission cooler, Scangauge II, ISSPRO EV2 Boost-EGT-Trans temp-Fuel pressure Gauges, DP T-5 Tuner (stock ,60HP tow, Decel, 60HP highway econo, 80HP city econo), Dieselsite coolant filtration, Max Air A/C mod, foglight mod, AIH delete, LED interior, back up camera, hid foglights.


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post #8 of 32 (permalink) Old 02-05-2019, 11:07 PM
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Quote:
Originally Posted by jleedog View Post
I think you may have air trapped in the system. Try running without the degas cap on for a few minutes and look to see if the level drops. You could also try disconnecting the upper radiator hose and see if you are getting any flow out of it while it is running.
Good tricks.
Another is to repeatedly squeeze the upper radiator hose while engine is running and you should feel pressure.
My favorite trick is to go drive up and down steep mountain roads to get rid of air pockets...ofcourse, this works much better in CO than FL.

Did you actually see the coolant sensor break? Or it just quit working? Maybe worth looking at the pigtail connection closer.

Also, did you get the serpentine belt wrapped properly around the pulleys. Back when I used to trust my memory, I reinstalled the serp belt only to realize after that I installed it wrong around a couple pulleys.

Last thought, did you do anything with your thermostat during your waterpump replacement?


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2002 F-250 4x4 CC SB 7.3 PSD w/4R100. 182,000 miles.
NOS Black CPS. ScanGauge-II, AIC, Bilstein 5100, Stancor GPR, Marinco Mod, B&W Turnover Ball, Michelin Defender LTX


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2002 F-250 4x4 SC LB 7.3 PSD w/ZF-6. 177,000 miles.
NOS Black CPS. ScanGauge-II. Bilstein 5100. Stancor GPR. Walker BTM. Noco Mod. Michelin Defender LTX 285/75/16.

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2000 F-250 4x4 SC SB 7.3 PSD w/4R100. 164,000 miles.
NOS Black CPS. Rebuilt Fuel bowl w/gold spring, 6.0 Cooler, Walker BTM, Stancor GPR, Michelin LTX M&S2.

Last edited by ArcticDriver; 02-05-2019 at 11:11 PM.
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post #9 of 32 (permalink) Old 02-06-2019, 10:12 PM Thread Starter
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Yes I saw it laying in two pieces on the shop floor lol and me cussing ranting crying so bought the part store sensor no good realized today the Ford place sold me engine oil temp sensor *** and I have a new Ford thermostat my question being (now that my funds are low) can I install a numerical gauge from autometer ( have one here I bought for my feed truck) or do I need this sending unit the stealership said it would run me 90 bucks Amazon said 50 to 60 any opinions

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post #10 of 32 (permalink) Old 02-06-2019, 10:24 PM
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Genuine Motorcraft is $45 at Rockauto and you can get 5% off that if you google a coupon code. Yes, you can put the Autometer temp gauge in. There is an extra port in the water pump. Thatís where I have mine.


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post #11 of 32 (permalink) Old 02-07-2019, 04:32 PM Thread Starter
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Just verified no flow from the water pump serpentine belt installed correctly so I'll be returning the pump 😵

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post #12 of 32 (permalink) Old 02-07-2019, 04:53 PM
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Just verified no flow from the water pump serpentine belt installed correctly so I'll be returning the pump 😵
The impeller and the belt pulley share the same shaft, don’t they?

Is the pulley loose?

I hope you can salvage the coolant atleast, what a pain.


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2002 F-250 4x4 CC SB 7.3 PSD w/4R100. 182,000 miles.
NOS Black CPS. ScanGauge-II, AIC, Bilstein 5100, Stancor GPR, Marinco Mod, B&W Turnover Ball, Michelin Defender LTX


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2002 F-250 4x4 SC LB 7.3 PSD w/ZF-6. 177,000 miles.
NOS Black CPS. ScanGauge-II. Bilstein 5100. Stancor GPR. Walker BTM. Noco Mod. Michelin Defender LTX 285/75/16.

SOLD:
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2000 F-250 4x4 SC SB 7.3 PSD w/4R100. 164,000 miles.
NOS Black CPS. Rebuilt Fuel bowl w/gold spring, 6.0 Cooler, Walker BTM, Stancor GPR, Michelin LTX M&S2.
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post #13 of 32 (permalink) Old 02-07-2019, 06:39 PM
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Really not much to a water pump as long as the impellors are not missing, interesting why its not flowing? What brand is it?

2002 F250 Super Duty Crew Cab 7.3L Lariat 2WD 131,000mi; 4in turbo back custom exhaust, Garrett GTP38R turbo, Riffraff intercooler boots, Dorman Up-Pipes, Ford Severe Duty AIS, 31 row 6.0 transmission cooler, Scangauge II, ISSPRO EV2 Boost-EGT-Trans temp-Fuel pressure Gauges, DP T-5 Tuner (stock ,60HP tow, Decel, 60HP highway econo, 80HP city econo), Dieselsite coolant filtration, Max Air A/C mod, foglight mod, AIH delete, LED interior, back up camera, hid foglights.


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post #14 of 32 (permalink) Old 02-07-2019, 07:18 PM
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If you have not torn into it yet, lets think about it a bit more.

How did you determine the waterpump is not working?

Is your degas bottle filled with coolant?

Does the upper radiator hose feel full of coolant when you squeeze several times?

Does the upper radiator hose get hot after the engine runs a bit?

I hate to see you pull off the waterpump if unneeded.
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2002 F-250 4x4 CC SB 7.3 PSD w/4R100. 182,000 miles.
NOS Black CPS. ScanGauge-II, AIC, Bilstein 5100, Stancor GPR, Marinco Mod, B&W Turnover Ball, Michelin Defender LTX


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2002 F-250 4x4 SC LB 7.3 PSD w/ZF-6. 177,000 miles.
NOS Black CPS. ScanGauge-II. Bilstein 5100. Stancor GPR. Walker BTM. Noco Mod. Michelin Defender LTX 285/75/16.

SOLD:
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2000 F-250 4x4 SC SB 7.3 PSD w/4R100. 164,000 miles.
NOS Black CPS. Rebuilt Fuel bowl w/gold spring, 6.0 Cooler, Walker BTM, Stancor GPR, Michelin LTX M&S2.
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post #15 of 32 (permalink) Old 02-08-2019, 05:23 AM Thread Starter
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No the upper radiator hose would not get warm after driving it roughly 20 minutes and the degass bottle never had to have coolant added I would think that if the pump was pumping correctly then the air would be pushed out and I would need to add coolant I drove the truck a few short drives since I've installed the new pump and never had to add coolant I was able to install the thermostat without losing much coolant and still it hasn't emptied the degass bottle it's a murry I should have went to Ford I guess I forgot the lower rad. hose wasn't hot either

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