Belts are for engines with lower horsepower and torque? You do realize that 1000-2000hp engines have belt driven oil pumps? You must not have been a good ‘engineer’.
The guy mentioning the Toyota hybrids was spot on everyone said how they were junk when they are know to run past 500,000 mi.
I remember as a kid when serpentine belts came out and how V-belts were better- ok.
If we listened to Boomers we’d still be driving flatheads and SBC engines.

 

I was a manufacturing engineer, not so much theory, as how to design and produce equipment to make thousands of a given part/assembly per day. We are talking about production engines in every day cars. Not 1000hp+. Have you ever actually worked on a vehicle with a cogged serpentine timing belt? Redundant question, of course you haven't. Did you realize that Honda replaced engines daily that failed at 50,000 miles, telling customers they needed the car a little longer to correct an issue? That's right, Honda dealers kept new engines in dealerships across the country and secretly changed them while offering free loaners. Ask an honest boomer Honda mechanic. Did you ever see the result of the tear down after a cogged belt failed and let the valves collide with the pistons. Redundant again, of course you haven't.
There are many different facets of engineering, and we all only know what we know. My experience with timing belts is extensive and negative over a period of 50+ years of designing tooling and working on cars. Stick to flipping burgers and walking your german shepard. You are a terrible critic and unqualified to decide what is 'good'.
SHOBLOCK

 

I think you're confusing interference designs Vs. 'cogged' belts.

 

ok ill play what Honda engine fails at 50,000 miles daily?

 

They were 4 cylinders back in the '90's, when quality was being touted by the Japanese. A fellow ski patroller was a Honda mechanic and told be the story about Honda motors failing at 50,000. There was an inherent defect in the oiling system due to a factory error. Numbers in the thousands. Because it was not a safety factor, the government didn't step in. When the car came in with a decided knocking noise, the customer was told it was a simple repair, but the car needed to stay overnight. The mechanics got so good at changing the old motor for a new one that it was often done the same day and the owner got a loaner to drive around. Some of the replacement motors were bad as this was before Honda had a good handle on the issue. To Honda's credit, the owner was never charged and was usually unaware he had a new engine. Just to say no manufacturer is perfect. the modern Quality system at Ford can tell you from a part number on a 7 year old motor when the engine was built, the supplier information, any defects from that date, and possibly even who installed the part on the engine on the assembly line. Very different now. You don't see nearly as many broken down cars on the road anymore because the Quality systems are so excellent.
SHOBLOCK

 

I'm comparing belts to chains in multiple applications. Example: There are no internal belts in a 3.5l Ecoboost. There are long timing chains precisely controlling cams with precision that no production belt was ever capable of. The chains have been tested to 250,000 miles. The bad days when belts got their reputation were during the Pinto and Vega days. Belts then rarely lasted 100,000 miles.
The new 'wet' oil pump belt in the '21 5.0l is very different, but it's still a belt not a chain, and now there is a jackshaft. Before it was a simple gear to gear setup with the crankshaft. Time will tell reliability, but I don't want to be the one spending the dough when the belt slips at 7,000 rpm, dropping oil flow to all the precision bearings and reciprocating components.
SHOBLOCK

 

That is total hogwash

 

The 2.7L also has a belt-driven oil pump. Same longevity concerns as the 5.0L?

 

No way, really??

 

Per Ford Parts website: https://parts.ford.com/shop/en/us/tr...-oil-6599045-1

Note the above is for a 2021 model. I do not know if older years of the 2.7L have a belt-driven oil pump.

I just learned about belt-driven oil pumps in these trucks today.