[QUOTE]Originally posted by Twisted6:
>>
It may not be just the O ring Depending on the Milage It may very well be the guides. The Umbrellas Work Good. For that Matter a little to good Not letting enough oil to the valve. I have rebuilt heads In the past that have had the Umbrellas Which had Burnt valve stems and chewed up guilds because of the Lack of oil to the guide. If you are plaining to keep It long term and this is a High milaged motor It maybe better to have the Head cleaned up and freshen the guides.<<
I had heard this about teflon seals.
I had a head done with teflon seals and pretty much toasted the guides for lack of oil.
This took 10's of thousands of miles, however.
Didn't use much oil though!
Last serious talk I had with a machine shop guy had as a plan teflon seals on the intakes, and stock or maybe umbrellas on the exhaust valves. Anyone hear of, or do, anything like this?
