The Stovebolt Site Forums The Shop Area Engine Shop replacement intake valves?

So, I'm driving 1,000 miles form texas to Florida and i managed to strip my cam gear halfway through the trip.

I towed my bolt back and found that the timing gear failure managed to bend 5 of my 6 intake valves.

I ordered new sealed power v-958 valves and was just about to lap them and put the head back together when i noticed that they have two grooves in them instead of one. My oem keepers fit both of the grooves, but this will result in the valve spring being a couple of mm lower (more compressed) than the orig.

Has anyone else run into this ? Did you install them and not look back or is there a different keeper that should be used on the new valves?


I've got a '42 1.5 ton. stock babbit pounder.

The keeper goes in the top groove and an 'O'ring oil seal goes in the lower groove, fitting against the bottom of the keeper. If I remember correctly, the original valves had only one groove, and an umbrella cap went over the valve tip and spring retainer to serve as an oil shield. That changed in the 1950's, but I don't remember the details. Perhaps someone else can fill some details. Memory is kind of foggy on that topic, but I think the intake valves had two grooves and the exhaust had only one- at that time (pre-historic times) it was thought that oil wouldn't leak through the exhaust valve guides. Which was proven to be a false assumption.

Harvester

thanks. Last night while laying in bed i figured that might be the case the case. I think I'd rather run my orig. caps than an o-ring.

Both the intake and exhaust valves have a single groove in them. My head had orig valves that were marked '41.

It is worth noting that the replacement valves are flat top (which would increase compression slightly) and a few mm longer with the keepers set a few mm off from the orig design.

Had i realized that the cam gear was fiber i would have never made these discoveries.