UPDATE:
Got truck on freeway and ran it up to 76 mph. 76 going up a long grade was the limit, it hit 198 degrees and blurted out coolant. Above 70 going up grade, it will max at 190 and no coolant loss. At 70 or less. It will stay at 183-185 consistantly. At idle it drops to 180-178. I can live with that. Not sure why the system hits limit at 75 mph going up grade. I could probably do 80 on flat ok. Some states have 80 mph speed limits. Get better mileage at 65 anyway.
That's the best I can do with all the cooling upgradegs I've made. Listed as follows 185 degree thermostat, BPD aluminum coolant pump, rerouting coolant filter return into the radiator, the severe duty fan clutch, blue wire fan lockup switch, the next options would a BPD or similar external oil cooler, replace heater core which may have clogging. The EGR has already been removed prior to my ownership. I'm not the only person who has overheating issues with a 6.0 liter Power Stroke as many videos on YouTube demonstrate. At least I have achieved manageable cooling in my engine.
The problem wasn’t your radiator to begin with. And it’s not over heating it’s over pressurizing. Two different things.
And that truck is speed limited unless the tune you may or may not have raised or removed it.
They don’t go faster than 80, stock, as I recall. And that’s hugging 3k rpms with 4:88s in OD.
Do a coolant system pressure test under load. I suspect you may not like the results. Hope I’m wrong.
They don’t go faster than 80, stock, as I recall. And that’s hugging 3k rpms with 4:88s in OD.
close, you would have to work out the math, but they are bassed on rpm (3800-4000) rpm is where the limiter kicks in, but yes it usaly worked out to 75 to 85 mph depending on tire size and gearing. so I would suspect you were hugging close to 4K rpm.
My question would be why is it puking out coolant at 198 degrees when a stock one doesnt even get the warning light on untill 220 degrees? the factory engine runs between 192 - 205 degrees and the thermostat isn't fully open untill 119 degrees.
It’s a 6.0no. Probably head gasket leak from the wonderful TTY head bolts. Or a past plugged EGR cooler or oil cooler. Or possibly a cracked head. (Just a wittle cwack at this point)
Ole Jeff don’t have a bulletproof ex engine as I recall.
Well, he’s got some of the bolt on bandaids.
Buying a 6.0 is like dating a hot lookin crack ho. It looks good and it’s wild and fun ride sometimes but the downsides are substantial and numerous.
ya thats why a 20 buck exhause gas /coolant test kit works wonders, will detect it even if it isn't making bubbles. I am leanign towards its because he had the clutch fan disconected, if he didn't realy have a problem before, he may have one now.
I've wondered that myself. There is no indication, blackening of coolant or bubbling in degas bottle to indicate a head gasket issue. Temperature gauge error? Unloaded, there is no issue. Add 4000 pounds TC, issue.
The engine may have been chipped, producing more HP than stock. Another guy I was having a beer with looked at the truck, liked it of course, and thought it looked like a larger turbocharger had been installed. I do have some service record information through CarFax but no idea what work may have been done outside of that. The truck does have pretty serious power. Keep in mind, all this is happening with the TC loaded but never unloaded.
Ouch. Big spinny thing and a tune is awesome but not on a stock 6 leaker.
