wazzabie 1/2 ton status Premium Joined Apr 17, 2001 Posts 2,922 Reaction score 447 Location Washington State Dec 28, 2023 #1 For 350 v8 valve stem seals do you prefer orings or umbrellas?
ZooMad75 #crawlabago Staff member Moderator GMOTM Winner Joined Apr 5, 2003 Posts 11,334 Reaction score 27,999 Location Arvada, CO Dec 28, 2023 #2 Gm umbrella seals used on the TBI engines. They don’t require machine work on the valve guide boss like PC seals do to fit. O-ring stem seals are a waste of time.
Gm umbrella seals used on the TBI engines. They don’t require machine work on the valve guide boss like PC seals do to fit. O-ring stem seals are a waste of time.
Wes Harden 1 ton status Staff member Moderator GMOTM Winner Joined May 28, 2005 Posts 18,774 Solutions 2 Reaction score 24,791 Location Lake Havasu City AZ Dec 28, 2023 #3 I do both, no extra energy to put the oring on while doing umbrella