Coolant Puked again...a little - Page 3 - Ford Powerstroke Diesel Forum
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post #21 of 42 Old 09-05-2019, 12:43 PM
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Interesting that this is coming up. I started a thread called Head Gaskets a while back and it has sparked some interesting information. @TooManyToys also posed the following link which has intrigued me.


https://www.ford-trucks.com/fo...coo...-question.html

Check out both threads and keep us posted.

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post #22 of 42 Old 09-05-2019, 12:56 PM
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How's your water pump? The original water pumps are plastic and can eventually break /crack and begin slipping on the shaft. Alliant makes a stamped steel version that isn't too hard on the wallet compared to the BPD one.

Is it possible there are still bubbles in the cooling system after getting back on the road?

I had my coolant pigtail take a crap. The jacketing on the wires disintegrated and caused open/short circuit (whatever causes 300+ degree temps). I knew it was electrical or sensor related because oil temp did not follow suit, but I have a stock oil cooler.

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post #23 of 42 Old 09-07-2019, 03:33 AM
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brazosdog02: you can do a bubble test. Do this when engine on working temperature:



I had up to 20psi in the system when hot (208°F and more ECT )




I checked and pressurized the EGR-cooler > everything was fine.








I checked and pressurized the oil-cooler > everything was fine and clean.






I checked the water pump > everything was fine. (installed the pump from BPD)

Solution: remove this f**cking EGR-cooler and throw it as far as possible. Installed EGR-delete and 7.3 fan clutch. My temps are now fine, no trouble with heat or pressure!!!

But: flush/reflush your cooling system several times and install a coolant filter ( I installed a inline filter, so 100% of the coolant is filtered). Clean the filter at every oil change, engine is running like a young deere

Regards from Merkel Germany
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post #24 of 42 Old 09-07-2019, 05:10 AM
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Quote:
Originally Posted by brazosdog02 View Post
Sensors checked out ok cold soaked. ECT EOT TRANS all within 1 degree. Trans was a couple of degrees higher but plenty close.

Towing now, just hit 240 ECT.....again....out of the blue....staying at 205-215 all day until it just up and spikes. EOT seems to follow ECT relatively. I have a BPD external oil cooler.

The truck alerted me to the temperature this time though. Dash beeped. Never seen that.
If the coolant is really that hot, you should also see it in the transmission fluid temp. Did you look at that when you saw 240* coolant?
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post #25 of 42 Old 09-07-2019, 05:30 AM
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deleted - double post!

Last edited by bismic; 09-12-2019 at 06:53 AM.
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post #26 of 42 Old 09-12-2019, 06:43 AM Thread Starter
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I’ll check more but I don’t see any change in trans temp at all.

I’m driving now and it’s doing a bit different. Cruising along at 200....spike at 235....fans come on then it settles and drives for a while at 175-180. Slowly goes back to 200-210.....and then out of the blue another spike. No change in speed, elevation or anything. I gotta get this piece of crap mishimoto out of my truck ASAP.

Oil cooler is BPD air to oil heavy duty.

Is this spiking related to EGR stuff dumping back in or something ?

Wash rinse repeat.

I can then drive 300 miles with no issue. Kinda acts like an air bubble.

Last edited by brazosdog02; 09-12-2019 at 10:02 AM.
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post #27 of 42 Old 09-13-2019, 06:51 AM Thread Starter
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Someone help me out with my logic:

How is this radiator not able to 'cool' under normal towing conditions? When the temperature his 220 or higher, the fan comes on and presumably the thermostat opens because the temperature then begins to drop all the way to 180 degrees. Isn't this an indication that the radiator CAN IN FACT cool if it has enough flow from the thermostat?
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post #28 of 42 Old 09-13-2019, 07:29 AM
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If it is dropping to 180°, that points to you thermostat. It shouldn't get below 192°ish after it's up to temp.

I would also buy least do the blue wire mod to be able to manually override the fan clutch when it's getting that hot
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post #29 of 42 Old 09-13-2019, 07:35 AM
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I'm set up similar to you and this is what I consider normal:

I have the BPD air cooled cooler and when I had the 6.0 fan clutch, at 100° air temp, towing flat and level towing 11k, I saw 205°-210° ECT with EOT at around 215°-220°. Taking the same load up the hill, I see 220° ECT and the fan will kick on and bring it down to 210°ECT Wheras the oil will be 234° EOT dropping to 220° EOT once the fan kicks on. No "Spiking" but it will take up to a minute for the ECT and EOT to rise once I start the hill, and about 30 seconds to cool down once the fan kicks on.

2005 F250, 189,000 Miles
Bullet Proof HD Oil Cooler w/ Cold Weather Kit, Bullet Proof EGR, Bulletproof Water Pump, 7.3 Fan Clutch
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15 MPG slick; 10 MPG towing 11k fifth wheel
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post #30 of 42 Old 09-13-2019, 06:37 PM Thread Starter
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Quote:
Originally Posted by repalmer View Post
If it is dropping to 180°, that points to you thermostat. It shouldn't get below 192°ish after it's up to temp.

I would also buy least do the blue wire mod to be able to manually override the fan clutch when it's getting that hot
Hmm not sure I agree....for the sake of argument. The thermostat would be full open to cool the motor and with the fans the temp should dive. It doesn’t STAY at 180...it just goes down to it. Once everything stabilized again we sit at 208-215 towing.

Is this incorrect?

I’m concerned with the rapid and more than occasional spike in temp going from 210 to 235 in less than 5 seconds. WTF can even do that? Think the OEM Tstat less than 1 year old is the problem ? I can drive 150 miles with no issue and then boom ... spike.

Last edited by brazosdog02; 09-13-2019 at 06:41 PM.
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