Ford 7.3 Gas Engine Failure
Lead Driver
Joined: Feb 2005
Posts: 7,970
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From: The Great State of Texas
Seems a bit odd, unless he has an extended warranty. Having said that there have been some reports of failures right under 100k miles. Don't know of any failures over 100k miles.
More Turbo
Joined: Oct 2023
Posts: 700
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Having three trucks im going to say its safe to assume they are in business. Getting an extended warranty included in the total purchase price gives one more to depreciate and the peace of mind of a warranty for the projected service life of the truck. Its very common for those of us in business.
Cargo Master
Joined: Oct 2020
Posts: 2,703
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Besides the Ecoboost V6's the 5.0 Coyote engines have had faulty intake valves also but I have not heard of any being recalled. From what I've seen the don't break they just wear the face of the valve down to a razor sharp edge and start getting low cylinders and misfires.
This thread is about the 7.3. Do they suffer from a valve failure problem?
This thread is about the 7.3. Do they suffer from a valve failure problem?
Logistics Pro
Joined: May 2022
Posts: 4,295
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From: Everywhere and nowhere
it's been over a week since the OP's 3rd post of all time. All of which were in this thread. Always a reliable source when they post n' ghost.
Lead Driver
Joined: Jan 2002
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From: Itinerant
The forum pundits always say issues are nothing burgers until they aren’t. Where there is smoke there is fire.
https://www.ford-trucks.com/articles...gine-failures/
https://www.ford-trucks.com/articles...gine-failures/
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Logistics Pro
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From: Everywhere and nowhere
Let me break the crayons out for ya. Ford has a history of calling problems normal for long periods of time (3.5 cam phasers) only to later admit they are real problems. The same with ignoring problems until the NHTSA is involved like 2.7/3.0 recall post. The 7.3 cam/lifter are analogous. It’s a problem. Ford is ignoring it, because the government isn’t on their azz over it, yet. The keyboard commandos with their egos wrapped up in their trucks will always downplay the issues until the companies are forced to admit there is a problem. That’s what I see here. It’s been a week since he posted. He must be troll. 🙄
Good luck chicken little. I dont give it a second thought when I drive my truck because I've seen very little real world evidence of an issue. They exist but seem rare not the norm.
Cargo Master
Joined: Oct 2020
Posts: 2,703
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It would be interesting to see some pictures of the failed parts but from what I've seen elsewhere on line the roller bearing on the lifter fails and then it eats up the camshaft. GM seems to have the same problem on the LS style engines for some reason which is weird because they seldom had trouble on the Vortec 305's and 350's and they use the same lifters.
Cam profiles are extremely mild on both of those engine types so it would be fun to plot the cam from a 7.3 Ford but I'd bet that it is similar. Ford had very little lifter trouble in the 5.0 and 5.8 engines either. I just wonder if it is just simply poor quality parts from formerly good suppliers. They are inconsistent so if you just happen to get 16 good ones then your engine lasts for a very very long time. It only takes one bad one.
Cam profiles are extremely mild on both of those engine types so it would be fun to plot the cam from a 7.3 Ford but I'd bet that it is similar. Ford had very little lifter trouble in the 5.0 and 5.8 engines either. I just wonder if it is just simply poor quality parts from formerly good suppliers. They are inconsistent so if you just happen to get 16 good ones then your engine lasts for a very very long time. It only takes one bad one.
Its Comin Right for us!
Joined: Feb 2005
Posts: 12,210
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From: GA
dodge was having 5.7 issues also
Ive got a 2/2020 build truck...p.o had excessive idle hours. Its over 600 idle hours at 46k
I'm thinking about proactively replacing lifters myself when 60k/5yr warranty runs out in few months. Guessing it would be easy to pull apart just like Gm's LS.
Is there a known replacement or upgrade out there? Does this in fact use the same LS lifter?
Logistics Pro
Joined: May 2022
Posts: 4,295
Likes: 2,417
From: Everywhere and nowhere
My guess is this,
dodge was having 5.7 issues also
Ive got a 2/2020 build truck...p.o had excessive idle hours. Its over 600 idle hours at 46k
I'm thinking about proactively replacing lifters myself when 60k/5yr warranty runs out in few months. Guessing it would be easy to pull apart just like Gm's LS.
Is there a known replacement or upgrade out there? Does this in fact use the same LS lifter?
dodge was having 5.7 issues also
Ive got a 2/2020 build truck...p.o had excessive idle hours. Its over 600 idle hours at 46k
I'm thinking about proactively replacing lifters myself when 60k/5yr warranty runs out in few months. Guessing it would be easy to pull apart just like Gm's LS.
Is there a known replacement or upgrade out there? Does this in fact use the same LS lifter?
If youre that worried about it. But the heads have to come off.
Logistics Pro
Joined: May 2022
Posts: 4,295
Likes: 2,417
From: Everywhere and nowhere
It would be interesting to see some pictures of the failed parts but from what I've seen elsewhere on line the roller bearing on the lifter fails and then it eats up the camshaft. GM seems to have the same problem on the LS style engines for some reason which is weird because they seldom had trouble on the Vortec 305's and 350's and they use the same lifters.
Cam profiles are extremely mild on both of those engine types so it would be fun to plot the cam from a 7.3 Ford but I'd bet that it is similar. Ford had very little lifter trouble in the 5.0 and 5.8 engines either. I just wonder if it is just simply poor quality parts from formerly good suppliers. They are inconsistent so if you just happen to get 16 good ones then your engine lasts for a very very long time. It only takes one bad one.
Cam profiles are extremely mild on both of those engine types so it would be fun to plot the cam from a 7.3 Ford but I'd bet that it is similar. Ford had very little lifter trouble in the 5.0 and 5.8 engines either. I just wonder if it is just simply poor quality parts from formerly good suppliers. They are inconsistent so if you just happen to get 16 good ones then your engine lasts for a very very long time. It only takes one bad one.
Cargo Master
Joined: Oct 2020
Posts: 2,703
Likes: 798
Its Comin Right for us!
Joined: Feb 2005
Posts: 12,210
Likes: 2,665
From: GA
Is that the same Johnson lifters that Big Block Scotty uses?
Ugh, did not know have to pull heads to get at lifters...Thinking about it now i see why
Alleged Factory
Cam Duration @ 0.050" 201 (Intake) / 212 (Exhaust) Valve Lift 0.539" (Intake) / 0.595" (Exhaust)
Based on comp cams "stage 1" mild cam grind, i would say factory is not super aggressive, but has a ramp rate that flat tappets would not be happy with
Engine Family 7.3L Godzilla RPM Operating Range 1500-6300 Cam Type Hydraulic Roller Camshaft Series Godzilla
Advertised Intake Duration 275°
Advertised Exhaust Duration 288
° Intake Duration at .050 Inch Lift 217°
Exhaust Duration at .050 Inch Lift 229°
Intake Valve Lift 0.598in
Exhaust Valve Lift 0.605in
Lobe Lift Intake 0.332in
Lobe Lift Exhaust 0.336in
Lobe Separation 121°
Intake Centerline 105°
Exhaust Close ATDC 23°
Intake Open BTDC 3°
Exhaust Open BBDC 72°
Intake Close ABDC 34°
Maximum Advance At Camshaft 16 deg
https://www.compcams.com/godzilla-st...ic-roller.html
Ugh, did not know have to pull heads to get at lifters...Thinking about it now i see why
Alleged Factory
Cam Duration @ 0.050" 201 (Intake) / 212 (Exhaust) Valve Lift 0.539" (Intake) / 0.595" (Exhaust)
Based on comp cams "stage 1" mild cam grind, i would say factory is not super aggressive, but has a ramp rate that flat tappets would not be happy with
Engine Family 7.3L Godzilla RPM Operating Range 1500-6300 Cam Type Hydraulic Roller Camshaft Series Godzilla
Advertised Intake Duration 275°
Advertised Exhaust Duration 288
° Intake Duration at .050 Inch Lift 217°
Exhaust Duration at .050 Inch Lift 229°
Intake Valve Lift 0.598in
Exhaust Valve Lift 0.605in
Lobe Lift Intake 0.332in
Lobe Lift Exhaust 0.336in
Lobe Separation 121°
Intake Centerline 105°
Exhaust Close ATDC 23°
Intake Open BTDC 3°
Exhaust Open BBDC 72°
Intake Close ABDC 34°
Maximum Advance At Camshaft 16 deg
https://www.compcams.com/godzilla-st...ic-roller.html