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7.3L IDI Diesels (Not Power Strokes) Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

       
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Old 06-13-2006, 09:52 PM   #1 (permalink)
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temperature issue

greetings
my truck has started acting crazy it seems
temp was running high so i replaced therm with a ih therm and installed a new fan clutchtemps got down like they should be but when i give it any throttle like on even a slight grade the temps come up
i heard there was a place that built 5 row radiators in cal for this truck does any one know
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HERS 95,f350,cc,4x4,7.3 psd,e40d,3" dp,4" exhaust with donaldson muffler,k&n in factory cleaner,tymar hpx,fpr shimmed,fuel heater removed,flapper removed from turbo and modified pedesta, tony wildman 4 pos chip,150000 mi and counting

boys
96 f350 cc/4x4 centurion, 7.3psd, 4" lift , e40d, fuel heater removed,fpr shimmed,ccmod, 150000 and counting
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Old 06-14-2006, 02:18 AM   #2 (permalink)
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Re: temperature issue

It is normal for temps to increase under load, if the guage increases then pegs hot that would be time to worry.....

Have you cleaned the fins on your rad/A/C evap lately, if not try that first.
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Old 06-14-2006, 02:37 AM   #3 (permalink)
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Re: temperature issue

When you had the thermostat out did you check to see if the "little steel ball" in the the upper housing is there/stuck or if the passage is blocked? If the passage is blocked it will trap air in the system and create hotspots. The ball MUST be there. If not go buy a new upper housing. OkieG
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<font color="red">1987 F350, 4X4, Crew Cab, DRW, w/'91 7.3 TURBO-CHARGED BY ATS, no-Wastegate(Turbo rebuilt by me 7/2005)</font>, <font color="blue">E4OD Auto, Aux Trans Cooler w/12" fan, w/Baumann Programable Trans Computer-12/05</font>, Rebuilt Injection Pump-2/03, Electric Fuel Pump, Coolant Filter, "BajaGringo Block Drains, 5-Row Radiator Core-9/04, 2 New Plastic Fuel Tanks w/new Sending Units/Pickups, Fuel Filler Neck Mods, Air Ram Intake, Air-Lift SuperDuty AirBags with Smart Lift Auto Leveling-7/2005 <font color="blue">Link to Photo of "OkieGringo Idler Pulley"</font>
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Old 06-14-2006, 09:28 AM   #4 (permalink)
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Re: temperature issue

Pete is right - it's amazing what straight clean fins on the AC condensor and radiator will have on a system. Do this before you start sourcing out a replacement rad - trust me getting a custom built rad is not cheap... I had one built for The Enterprise a few years back (4 core - dimpled - double the fin count per inch) - yes it cools like a son of a gun but it also was close to a grand to have built - but it stopped my cooling issues or lack there of dead in it's tracks.

if you weren't have a problem with cooling before and now you do and didn't make any large changes in the perfomance upgrade department then you shouldn't need to upgrade the rad to something larger - that tells me that you just need to inspect/repair the stock type cooling system.
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Old 06-14-2006, 04:33 PM   #5 (permalink)
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Re: temperature issue

greetings
okie how do you check the operation of the ball by pushing it or rolling it and after you verify that it is there how would you clean it if its stuck

i was having high temps and put in a banks system ,the temp came up faster, so i replaced the therm i had in it with a ih therm and the fan clutch ,the radiator was rodded about 10,000 miles ago ,the turbo makes gobs of boost and the pump is maxed out and on a hard hill wot the temps only go to 900deg,that is measured at the outlet of the exhaust manifold on both sides
i ran a comp check about a month ago and had very good comp less than 10percent between all
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MINE 95 f350,cc,4x4,7.3psd,e40d,3" to 4"down pipe ,5" straight exhaust,afe stg 2 intake,byron eddins elect fuel system,cobalt oil,boost,pyro,trans temp gauges,bpd stg1 injectors, 17deg hpop and 96 resavoir mod, 3.55 gears rear Limited slip , rear air ride suspension ,front add a leafs ,crank case vent mod,hughes cast trans pan,sonnax valve and superior steel accum valves, tony wildman 4 pos. chip, ported turbo and modded pedestal, 6.0 ic with custom 3" intakes and pipe, custom byron eddins 4 line oilsystem with no check valves in hpop ,119,000mi and counting

HERS 95,f350,cc,4x4,7.3 psd,e40d,3" dp,4" exhaust with donaldson muffler,k&n in factory cleaner,tymar hpx,fpr shimmed,fuel heater removed,flapper removed from turbo and modified pedesta, tony wildman 4 pos chip,150000 mi and counting

boys
96 f350 cc/4x4 centurion, 7.3psd, 4" lift , e40d, fuel heater removed,fpr shimmed,ccmod, 150000 and counting
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Old 06-14-2006, 04:45 PM   #6 (permalink)
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Re: temperature issue

Okie, why MUST the steel ball be there? What if its gone? As long as the hole isn't blocked I don't really see why its necessary because air will escape thru the hole.
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Old 06-14-2006, 10:42 PM   #7 (permalink)
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Re: temperature issue

When the steel ball is free, it blocks the coolant flow when the engine is running, which allows the thermostat to regulate the temperature. If the ball is missing the coolant will have a route to bypass the thermostat causing longer warm up time. But when engine is off and coolant is not pushing the ball it will fall back down to the bottom of the hole but will allow trapped air to escape. Ok? OkieG
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<font color="red">1987 F350, 4X4, Crew Cab, DRW, w/'91 7.3 TURBO-CHARGED BY ATS, no-Wastegate(Turbo rebuilt by me 7/2005)</font>, <font color="blue">E4OD Auto, Aux Trans Cooler w/12" fan, w/Baumann Programable Trans Computer-12/05</font>, Rebuilt Injection Pump-2/03, Electric Fuel Pump, Coolant Filter, "BajaGringo Block Drains, 5-Row Radiator Core-9/04, 2 New Plastic Fuel Tanks w/new Sending Units/Pickups, Fuel Filler Neck Mods, Air Ram Intake, Air-Lift SuperDuty AirBags with Smart Lift Auto Leveling-7/2005 <font color="blue">Link to Photo of "OkieGringo Idler Pulley"</font>
<font color="red">Link to GP Controller Diagram</font> <font color="blue">Link to "Electric Fuel Pump Wiring Diagram"</font>
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