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While on hold from the machine shop ive had the opportunity to clean up and do some painting on this bastard 350 . she's starting to grow on me!And yes a red fan blade why the hell not
Got the heads back from the machine shop . Ended up only needing the one guide all else spec’d out they glass beaded the heads polished the valve stems and lapped all the valves replaced the valve retainers and replaced the one bad exhaust valve. Will start putting things back together this weekend after some fresh paint .
looks like the regular umbrella seals to me.I do not know the brand
these seals look like the felpro seals I wonder if I should just replace them now they are the ones that were on the heads so not new . What would a good seal to get without having to do machine work ?
I have used these on my last few engines. Did not even know they existed until I got this set of heads back from my machine shop with these installed. Fit over guides with no machining and have a small spring to keep a tight seal around the valve stem.
Those look nice, post a part number on those positive seals. Most common positive seals need the guide machined to fit properly. Looks like this 350 will make a nice running motor.
Don't have a part number. I had to look them up by valve stem diameter as I could not find them listed anywhere for an olds or pontiac (last 3 engines I put them on: 68 olds 445, 68 olds 455, 67 pontiac 400).
The factory type valve stem oil seal is a "shroud" type of device which keeps oil from splashing directly onto the valve stem but allows the mist of oil inside the valve cover to provide some lubrication to the valve stem and guide. Over the years, the seal material has been refined and current replacements are a plastic type material. The seal fits tightly on the valve stem and locates itself on the valve stem upon initial engine start. I highly recommend the use of the stock factory type valve seals on any stock or near stock rebuild. On my personal vehicle, '67 W30, I use the shorter exhaust valve seal on the intake and no seal on the exhaust; the motor does not use oil.
The factory type seals are fine. Oldsmobiles dont seem to have a problem with oil consumption from that area. The 307 in my Wifes Riviera never used a drop of oil and it went 250K miles before the timing gear gave it up. When I rebuilt the engine I just put the factory type seals back on and it has been about 5K miles and it has not used a drop.
The factory type seals are fine. Oldsmobiles dont seem to have a problem with oil consumption from that area. The 307 in my Wifes Riviera never used a drop of oil and it went 250K miles before the timing gear gave it up. When I rebuilt the engine I just put the factory type seals back on and it has been about 5K miles and it has not used a drop.
The factory type seals are fine. Oldsmobiles dont seem to have a problem with oil consumption from that area. The 307 in my Wifes Riviera never used a drop of oil and it went 250K miles before the timing gear gave it up. When I rebuilt the engine I just put the factory type seals back on and it has been about 5K miles and it has not used a drop.
I couldn't agree more, my 307 used/leaked a half liter oil at 450,000 km. I had all the bills from when the car was bought new in 82, no major work. I like Oldsmobile V8'S because they were the best from the mid 70's till the mid 80's for reliability.
The valve covers were pretty rough so it has a 455 cover on one side . Good catch ! I have some real nice ones still not sure what I’m going to do with thing
February 24th, 2022, 03:38 PM
