• Hello there guest and Welcome to The #1 Classic Mustang forum!
    To gain full access you must Register. Registration is free and it takes only a few moments to complete.
    Already a member? Login here then!

Replace factory Cleveland valves?

cmayna

cmayna

DILLIGARA?
Donator
I posted my engine on another forum that specializes in Cleveland engines and one guy said:

"Factory valves = Boom!

Everything looks pretty good except for what looks like factory valves.
If you do nothing else, replace the factory valves with one piece stainless valves with a single groove keeper.
The OEM two piece valves have been know to come apart with alarming regularity."

Since I was going to have the heads disassembled and hot dipped anyway, I guess that would be the time to change the valves.


BTW, looking into the exhaust holes of the heads, it looks like some porting was done for the machine shop had ground down a lot of the rough metal surface inside.
 
While replacing the factory valves is not a bad idea, I doubt that anything under 7000 RPM will grenade them.

Besides, you'll be swapping out that broken T5Z long before any valve fails you.... :skull


What do the guys on the Cleveland site say to do?
 
I'm no engine expert, but I do stay at a Holiday Inn Express!

Several folks on VMF have experienced early engine failure in the Clevelands with the two-piece valves. The one-piece should be more reliable.
 
Your building a Cleveland? I thought those engines went out with the dinosaurs. But if your building one yes replace the valves. I buddy of mine blew 2 of them back in the day. Both with broken valves.
 
I'm not exactly a cleve expert either, but I've heard the same thing several times. I'd think one piece valves would be cheap insurance.
 
I take it, then, that you're keeping these awesome heads?
 
You must log in or register to reply here.
Back
Top