Yes, this list is very limited. It is likely yes I just was wondering if anyone had any concrete data about valve travel and such since there is apparently not a clear answer. I will just have to open it up and take a look a suspect.

 

When you tear into it maybe the first thing to do would be to take off the intake and the valvetrain. Then just make up a plate and vacuum check the intake valves or put air in each cylinder. If it doesn't blow past the valve you're golden.

Please post your results.

 

Will do I may not get to this project for maybe a month but I will make a new post and link it on this thread.

 

I don't think the 460 was an interference engine, at least not originally. The early high-compression 460 came out in the 1968 1/2 Lincoln, and in 10.5:1 form ran up through the 1971 Lincoln model year. Compression took a big dive after that. Anyway, the big bugaboo about aged early high-compression 460s was the nylon-overmolded cam sprocket. The nylon would wear with miles and age, and was known to collect and plug up the oil pickup screen, which was about the only killer of the engine. I dutifully pulled the timing covers on my two, and they were both pristine! I went ahead and changed sprockets and chains anyway. I never heard ANY concern that when they got bad enough to slip, that disaster would result. No, it was all about oil pickup plugging.

So unless the later low-compression bigger-chamber design also made a significant change to the overall valving scheme, I wouldn't think interference would be an issue.

 

I think that the valves generally remained the same throughout the 460s

 

The designs from the open chamber D2VE on used valves that are shorter than the ones used in the earlier engines. The top of the valve is at about the same height but the chamber has been made deeper to gain volume. This should make a D3VE head less likely to have the valves hit the piston than a DOVE style cylinder head.

 

But the internet says it's the "complete list" so it's gotta be. :-)

 

That's right. Here's two more that I know will hit, Chevy Vortec 350 and Chevy 235 6 cylinder. The Vortec is known to sometimes hang an exhaust valve and they'll get bent every time. A 235 is bad about a stuck intake valve if they sit around and or have bad gasoline in the tank. I'm still not sure about the 460, it does have more than .430 valve lift on the intake side, is the valve relief, deck clearance along with how far the chamber is recessed enough to make it not hit?

 

https://itstillruns.com/list-ford-in...s-8042311.html

This list of Ford interference engines from 1981 to 1995 does not include the 7.5 460.

 

It's technically not an interference engine...on the stand. If you're concerned about valve damage,other things must be considered,like RPM and spring condition when the motor went down.

 

With those dished pistons they run? Not buying it. I worked at an Olds dealer in the early 80s and did several, never had any valve damage.

 

I had one come in where they had timed the cam using the key instead of the dot on the crank snout. It had all the intake valves hitting, one of them broke and we had to sleeve the block. How did that happen?

 

The engine actually wasn't running when it went down. The camshaft broke off while cranking. I believe it was broken off because of a water pump bolt stopping the gear from turning. I refreshed the heads recently so the springs are all in good condition.

 

Had a cam bolt fall out of a 400 Pontiac once, fell into chain and busted it, only bent 4 intake and 4 exhaust valves.

 

was it a stock engine or was it built that's the thing