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7.3 Godzilla Engine Failure Thread, Post Them Here

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Old Jul 11, 2023 | 05:20 PM
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7.3 Godzilla Engine Failure Thread, Post Them Here

If you have had or you directly know of a 7.3 Godzilla engine failure, please post it here.

Not some YouTube video or a story of a friend of a friend’s grandmother that had a failure. Real first hand accounts of failures.
Lifter/cam failure, scored cylinder walls, broken piston skirts, plug wire failure, leaky front main seals, etc… that sort of thing, whatever you got!

There seems to be a lot of rumored failures but very few actual first hand accounts of them.
 
Old Jul 11, 2023 | 05:43 PM
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Pretty sure there was a poll on here and no one had experienced it first hand.
 
Old Jul 11, 2023 | 06:09 PM
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From: Flint
Old Jul 11, 2023 | 08:19 PM
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Originally Posted by Thevol
Pretty sure there was a poll on here and no one had experienced it first hand.
I saw and participated in that thread but it was only specifically polling how many had ”LIFTER ISSUES”.
 
Old Jul 11, 2023 | 10:43 PM
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My 2020 had a front main seal leaking fairly early on. It’s been replaced by the dealer and I haven’t had any more issues with it.
 
Old Jul 12, 2023 | 01:04 AM
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guy on the other 7.3 thread claims to be a tech for 22yr and seen some trouble with the engine. if his credentials are true he would be the guy to talk to as he would be seeing it first hand
 
Old Jul 12, 2023 | 01:13 AM
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Originally Posted by willynilly
guy on the other 7.3 thread claims to be a tech for 22yr and seen some trouble with the engine. if his credentials are true he would be the guy to talk to as he would be seeing it first hand
You mean the guy who claims synthetic oil is what is killing our engines?
 
Old Jul 12, 2023 | 04:58 AM
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I service six 7.3L as of now. Had the spark plug wire failure on two of the 2020 models, that has been all so far.

Mileage as of last service date
2020 F600 - 83,263mi
2020 F600 - 91,002mi
2020 F600 - 92,423mi
2020 F600 - 117,962mi
2020 F600 - 124,116mi
2022 F550 - 9,453mi
 
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Old Jul 12, 2023 | 08:13 AM
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My '21' 7.3 noticed front crank shaft seal leaking at 17,983 miles, repaired at 26,000. Truck has 107,665 miles now with no issues since then.
 
Old Jul 12, 2023 | 08:24 AM
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Originally Posted by JayCarver
My 2020 had a front main seal leaking fairly early on. It’s been replaced by the dealer and I haven’t had any more issues with it.
Originally Posted by scraprat
My '21' 7.3 noticed front crank shaft seal leaking at 17,983 miles, repaired at 26,000. Truck has 107,665 miles now with no issues since then.
How did you guys notice it was leaking, did it drip on the ground or did you have to crawl underneath it to see it?
 
Old Jul 12, 2023 | 08:29 AM
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Originally Posted by OBS460
You mean the guy who claims synthetic oil is what is killing our engines?
That takes me back to the late 1970s, when I was told synthetic oil is “too slippery” for American engines. Supposedly, the stuff will just run past your rings, valve seals, and gaskets.
 
Old Jul 12, 2023 | 08:45 AM
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Originally Posted by redford
That takes me back to the late 1970s, when I was told synthetic oil is “too slippery” for American engines. Supposedly, the stuff will just run past your rings, valve seals, and gaskets.
As someone who was born in the late 90s, I've always thought it would be pretty cool to go back and see what the 70s were like (ya know, assuming time travel was possible). However, hearing things like this and then seeing people from back then saying America was turning into a communist country when drinking and driving was made illegal REALLY makes me wonder what the 70s were like.
 
Old Jul 12, 2023 | 08:49 AM
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Originally Posted by willynilly
guy on the other 7.3 thread claims to be a tech for 22yr and seen some trouble with the engine. if his credentials are true he would be the guy to talk to as he would be seeing it first hand
Originally Posted by OBS460
You mean the guy who claims synthetic oil is what is killing our engines?
Originally Posted by redford
That takes me back to the late 1970s, when I was told synthetic oil is “too slippery” for American engines. Supposedly, the stuff will just run past your rings, valve seals, and gaskets.
That 22 year Tech went radio silent about synthetic oil being harmful on that thread when I pointed out that all performance and luxury cars only use full synthetic oil.
 
Old Jul 12, 2023 | 09:13 AM
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Originally Posted by GAZZILLA
How did you guys notice it was leaking, did it drip on the ground or did you have to crawl underneath it to see it?
I noticed mine at my 2nd oil change.
https://www.ford-trucks.com/forums/1...seal-leak.html
 
Old Jul 12, 2023 | 09:23 AM
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I spoke with my son yesterday (Tech at a Ford dealer in Central Texas) and I asked him if he's seen any 7.3's with lifter issues. Said no. He said you rarely see them in the shop. He said 6.7 upper oil pans keep him busy.
 



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