Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
The seals ride on the valve stems...they move up/down with the valve, so they do fit quite snug. Some seals do fit on the guide boss AND the valve...those are "positive" seals. They seal completely, but they are "attached" to the guides themselves, and the valve stems move thru the seals. The umbrella type seals do allow some oil to splash back onto the underside of the seals, and run down the stem, and onto the guides. Not as much as the cheesy o-rings, of course, but a little...enough to give some lubrication to the guides.
|UPDATED|8/12/2012 5:19:36 PM (AZT)|/UPDATED|
____________________________________ Joel Adams C3VR Lifetime Member #56 My Link
Vette(s): 1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day.
The kind I saw were the ones attached to the boss and fit tight around the valve stem. I do remember seeing the other kind at a store now that you mentioned them, just never on an engine. I can see how they would work better.
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