Paul L

The instructions said no machining required so we didn't. The 1979 has gone hundreds of miles since the job with no problems. We just did a 1980 as well without machining.

http://www.cranecams.com/?show=brows...umber=99819-16

SteveG75

Interesting note Paul.

Your link to the Crane web site shows the white Teflon seals (site says machine required) which is what I had originally. Your picture of the actual parts (same part #) shows black Viton seals that look identical to the Edelbrock ones that I installed (that stopped my oil burning).

I wonder if Crane changed their product using the same part #.

Paul L

Steve,
Scroll down a bit and it says "No machining required." I bought the seals 4-5 years ago and only installed them this autumn so no doubt the viton has been superseded by teflon. There is a minor difference in the part no.: the old are 99819-18 and the new are 99819-16. I do not know the significance of that.

Sometimes Crane weasel words the description with "Machining usually required" leaving you to guess when it is not needed. We chose not to and all is well.

SHAKERATTLEROLL

I myself like to run the Teflon PC seals on the intake and stock seals on the exhaust. Reason for this is the stock valve seal will let a tad bit more oil through to the exhaust for cooling and lubrication as it grows more. But I would also check the valve to valve guide clearance. If the valve guide is worn too badly then why put a band aid on your elbow for a sore on your knee?