Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - 454 umbrella valve seals
View Single Post
  #4 (permalink)  
Old 04-23-2013, 03:23 PM
oldbogie oldbogie is offline
Registered User
 
Last photo:
Join Date: Apr 2007
Location: Seattle, Wa
Posts: 6,827
Wiki Edits: 0

Thanks: 4
Thanked 451 Times in 386 Posts
Quote:
Originally Posted by ss396si View Post
This is my first build. I have a 454 w/781 heads and dual valve springs .im having a problem installing valve seals. Now I slide on the umbrella valve seal( comp cam 504-16) for the intake valve. It fits on nice and tight but the base of the seal does not reach the base of the retainer. Where the spring sit. Is this normal?
Umbrella seals are not so much a seal as a shield that rides on the valve stem to deflect oil away from the stem and upper guide. It is not intended to cover nor attach to the upper guide. See first attached picture.

Items that actually make a seal between the stem and guide require the guide OD be machined to a specific diameter, they then slide down that machined surface and are friction retained by a metal clamping device. The stem fits through the seal which wipes the stem but does not ride with it.
See second attached picture.

Bogie
Attached Thumbnails
Click image for larger version

Name:	UmbrellaShied.jpg
Views:	82
Size:	14.6 KB
ID:	73510  
Attached Images
 
Reply With Quote