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When we bought our 7.3 work trucks we scheduled them for engine overhaul at 300k miles because that was what the dealer said the life expectancy was.
Since then we have had 2 trucks run over 600k until we traded them in. At the time they were still running fine. For the remainder of our fleet, we adjusted the overhaul marker to 500k and will see what they look like when the time comes.
Not sure what the 6.7 published life is...I think it's still at 300k according to Ford. The Cummins 6.7 is 500k.
I think rear axle ratio has something to do with engine life.
My F550 with 4.88 is on it's second engine, replaced at 105,000 miles.
It didn't blow up, but developed a knock that was audible on deceloration.
I didn't want to be stranded somewhere out on vacation with the 5th wheel so I elected to replace it.
Bfife's F550 is on it's second engine too. He bought it that way from the government and it was replaced somewhere in the 30,000 mile range according to the report when he bought it.
1999 F550 4x4 ZF6 pulling a Cedar Creek 36RLTS. Lotta mods.
1999 VW Jetta TDI 5speed stick, Titan 520's, CCV, EGR, CAT.
2000 VW Passat 1.8t Tiptronic. ZZOOOOOMMMM!!!
You cannot explain or explain away the power of God.
Per International's literature, the T444E has a B10 life of 200,000 miles and a B50 life of 350,000 miles, which is the same as the older 5.9 Cummins B series. With Ford's programming, I don't know, but can reason those aren't too far off from what I have seen.
Note: Cummins does not publish B10 for their ISB 5.9 directly, only B50
2002 F-350 Powerstroke 4x4 Crew Long bed All black Lariat custom Cobra cb mount, 05 Mirrors, ZF6 mod, Manual Transfer Case
Last edited by camodown; 02-26-2011 at 07:36 PM.
Reason: Confused my numbers B20/b10
I think it is described as the "half life" of the engines. If I am correct, I think it means that 20% of the engines will require a major overhaul at 250,000 miles and 50% of them will need a major overhaul by 500,000 miles.
We will see what the pros think but I thought I read this somewhere before.
__________________ -Alex- Proud Owner of "Mugly" (Click for pics)
01 F250 PSD, 296k, 4x4, CC, SB, AUTO.
Mods: DP Tuner, EGT/Boost/Trans/Oil, 5inch Exhaust, BFGs, Hawk HPS, and a ton of "can do" attitude.
The definition of Bx life as per International is 'requiring major repair which requires head removal or oil pan removal.'
Does B20 mean that International projected that 20% of their T444Es were likely to require major repair by 250,000 miles? And does B50 mean that 50% were projected to require a major repair by 500,000 miles?
2001 F250 Lariat CC LB, 4x4, 84,000 mi, Auto, Kelderman 4-Link Air Lift Suspension, AirRaid AIS, Banks Turbo - IC - 6 Gun Diesel Tuner - Billet TC - TransCommand, 40" Toyos, Dana 60 kingpin front axle, 5.13s, Detroits, Bully Dog Propane Injection, Kwik fuel Pump-in-Tank Mod, Harpoon, Standby fuel pump on frame rail (Hutch), Kwik FuelX & Return, Engine Oil/Transmission/Coolant Bypass, Delo ELC, KCM HPX, Stancor GPR, AIH Delete, 50 cent mod, CCV, 140V IDM, PSC hydraulic ram assist PS ...
David Norwood. 2001 F350 7.3 DI CC dually purchased new.
Alternative Fuel User Since 2003-vo is always in my fuel. Only one fuel tank. GPI/CIM-TEK spin on filterhead and 10 micron filter.Superchip. Hutch and Harpoon mods 2010. Diesel inline wix (33007 or 33972) filter between tank and Airtex E2236 fuel pump (rated to 110 psi).Fuel pressure gauge. HOH for fuel line heat from tank to 12v lift pump & two 12v 36" heaters. July of 2013-265/75/16 E range BW Michelin.
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