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smaller 3/8" umbrella seals ?
TomP:
I am putting a pair of FE heads together and the springs are doubles... and won't fit the normal umbrella seals. Guides are too big for PC seals. Pretty sure i've heard of smaller 3/8" umbrella seals. Anyone know an applicaion or part number?
pbf777:
Well, I don't have any dimensions of what you might really require but there is this:
GM UMBRELLA SEALS, 3/8"
Application: SB Chevy Truck Engines w/ 3/8" Stem exhaust valves
Specification Data:
Fits: 3/8" Valve Stems.
Inside Diameter, smallest point: .605”
Inside Diameter, widest point: .635"
Outside Diameter: .715"
Height: .450” Tall
Seal Material: Poly Acrylic
Material Temp Rating: 375F
AVAILABILITY: :-\
But I think, you might be barking up the wrong tree with this plan! :-\
Scott.
TomP:
Who'da thunk SBC's even had 3/8" valves! Thanks. I think those should be OK. Just two sets of them. Found a link with them and dimensions of others too. Some are larger PC seals. https://www.alexsparts.com/valve-seals-3-8/
TomP:
Actually these look ideal . late 80's 318 Mopar, PC seals with .640 ID https://www.alexsparts.com/3-8-positive-in-ex-seals-viton-sb-chrysler-318-360-1988-1991-3-8-x-640-vss-275/
manofmerc:
These pioneer #940 are probably to big but a really good seal for stock heads .I have used them on two engines and they work fine .I believe they came on buick v-6 engines .Good luck ! Doug
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