Valve question

Skip Burney · Mar 22, 2017

Ok for tonights installment on my ongoing saga. There looks like a rubber seal on each valve guide but I cant find them in the parts section. I don't want to reuse them does anyone know where they might be found. Can I use the same exhaust valves with just the rotating retainer assemblies or do you have to buy special valves too. My exhaust valves look pretty good so I am going to reuse them but if I can I want to use the rotating locks and retainers.

Den N Ms · Mar 22, 2017

Skip ,Most of the complete overhaul gasket sets will have 8 valve guide seals in them when you only need 4 of them on the intake valve guides.If your valves all look good just have them refaced and your seats ground.You probably don't need the exhaust valve rotators if you don't intend to use it in the field under a heavy load for hours on end.It has ran all these years without them.Not only that but they are a PITA to install correctly.You need to use adjustable lifters for easier valve adjustment also.

Ken(Ark) · Mar 23, 2017

Can I use the same exhaust valves with just the rotating retainer assemblies or do you have to buy special valves too. My exhaust valves look pretty good so I am going to reuse them but if I can I want to use the rotating locks and retainers.

The valves , retainers , keepers are all different .

I am also looking into the issue . Seems rotators on the factory seats without lead in the gas will wear the seat . No rotators may let a valve burn . Replacing the seat with a hardened seat is a bigger deal . And finialy it may be that it is not THAT big of a deal anyway you go , as in you may only get 9000 hours life instead of 10,000 hours . With most of us we want to do the best with what we have to work with , even if it is only "Technically" best and we see no real advantage .

Here is a post from someone with first hand experience .

(quoted from post at 19:07:29 03/22/17) I ran an automotive machine shop for several years, rebuilding many N blocks. You'll want to adjustable lifters, otherwise it's grind the stem, grind the seat, grind the valve face, then do it again and again until you get the proper clearance. Adjustable lifters work well on straight or mushroom valve stems. Stick with the one-piece guides. The split guides were for the old mushroom-stemmed valves. DO NOT put valve rotators on! No-lead gas means no lubrication between the valve face and seat, and rotators cause everything to wear faster. That's why we put hard seats in old engines, otherwise the valves disappear into the block or head.

Skip Burney · Mar 23, 2017

That's exactly where I am at my wife will come out to the shop and see me sitting and staring at an airplane or old car I am restoring and laugh and call me her mule because if I were a mule standing between 2 piles of hay I would starve to death trying to decide which pile to eat from. I swear I over think everything I do.

Valve question

Skip Burney

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Den N Ms

Well-known Member

Ken(Ark)

Well-known Member

Skip Burney

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