Valve guide seals
Thread Starter
Instructor
Joined: Jul 2010
Posts: 177
Likes: 0
Valve guide seals
I want to replace my valve guide seals on my '79 C-3 with out removing the heads. I've done this once before and I have the tools. I need my memory refreshed, do I need to have the piston TDC when I do that cyl. I can't remember if I rotated each piston up before doing each one ? Thanks in Advance.
Race Director
Joined: Jul 2004
Posts: 12,706
Likes: 329
From: Scottsdale Arizona
Le Mans Master
Joined: Aug 2010
Posts: 9,272
Likes: 17
Drifting
Joined: Jun 2010
Posts: 1,781
Likes: 15
From: Oxford Ohio
If you are using air to keep the valve up, the air pressure will force the piston to the bottom of the stroke. Don't try to keep the piston at the top of the dtroke, with the compressed ait method, it doesn't matter. Pull all your plugs and remove the rockers. Would be a great time for roller rockers.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
Roller rockers are a complete waste of money for the average "motorhead". Roller lifters/cam is a different story, however.
I think roller rockers would be the absolutely LAST add-on for a very well built up engine that will turn over 7000 rpm. Otherwise, forget it.
I think roller rockers would be the absolutely LAST add-on for a very well built up engine that will turn over 7000 rpm. Otherwise, forget it.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Drifting
Joined: Jun 2010
Posts: 1,781
Likes: 15
From: Oxford Ohio
Rollers are much more precise than stamped steel, with regard to ratio. They wear less than the stamped steel. Both at the tip and the fulcrum end. MAgree, not necessary, but a nice add on. The bearing fulcrum creates a touch less heat than metal scrubbing on metal under high spring pressure.
Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
MY preference is the PC Viton seals. Be sure and check that you get the correct diameter seal for your valve AND valve guide. Some require cutting the guide to fit. And use the seal install tool that keeps the sharp edge of the valve from cutting the ID of the seal.
Le Mans Master
Joined: Jan 2006
Posts: 6,506
Likes: 139
From: Butler Pa
Rollers are much more precise than stamped steel, with regard to ratio. They wear less than the stamped steel. Both at the tip and the fulcrum end. MAgree, not necessary, but a nice add on. The bearing fulcrum creates a touch less heat than metal scrubbing on metal under high spring pressure.