Valve Guide Seal
Posted 21 June 2020 - 04:19 AM
Posted 21 June 2020 - 06:29 AM
Oil on the Exhaust Valve stems can burn and so wear the stems & guides, also on the Exhaust Valve Seats will pit them real bad.
Posted 21 June 2020 - 06:40 AM
My latest head from MED only has them on the intakes too.
Posted 21 June 2020 - 09:03 AM
Posted 21 June 2020 - 09:19 AM
Posted 21 June 2020 - 04:05 PM
I use the uprated Minispares ones on all 8, but only because I take all the valves out when I decoke a head.
I understand the argument for only doing the inlets, but if you have got that far stripping the head, what the hell, they can't do any harm.
Posted 21 June 2020 - 09:31 PM
What's the reasoning with boost, Phil?
Temperature, the exhaust valves need all the lubrication they can get.
Posted 22 June 2020 - 07:24 AM
I wonder how much oil pressure differentials will allow when you're on boost? Though there could be all sorts of Bernoulli weirdness going on too.
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