Valve Seals, Guide Tops .603" S&S

[Don D]

S&S swears they are all .625, not true. OK this is not the first time I have run into this, guide tops are undersize and the Klines will not stay put. The ID of a new Kline or Kibblewhite equivalent are about the same right there at .605. What is the fix for this? I am not going to replace the guides just for that, the parts are in good condition. Thought about cutting the tops for the early style. I can, just wondering if anyone else has seen these and how they dealt with it.

[xlfan]

I did see it some years ago, got the same swear treatment from S&S, and cut them down to .560's.

[ghostrider]

I have S&S heads with those guides too,  i think there seals work,   https://www.alexsparts.com/viton-valve-seals-3-8-x-597-605-universal-for-harley-shovelhead-sold-in-pairs/

[Hillside Motorcycle]

We have simply used automotive seals, when we first witnessed this years ago........

[Dogbone45ACP]

Don, you put Viton seals from a GM 8.1 on my S&S heads.

[ghostrider]

Enginetech  S810V   seals should work as well.   But the viton ones are kinda tall if you a bigger cam.

[Don D]

Don, you put Viton seals from a GM 8.1 on my S&S heads.

Most of the automotive seals like those for the GM are very tall and limit the lift a lot. After giving this some thought I am going to cut them to .562