They are just broke in 
Lifter install?
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Joined: Aug 2009
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Lifter install?
do the heads have to be removed to install new lifters? and are c6 z06 lifters a good lifter for a cam swap in a c5z? and are they the same height as the stock ones so pushrod lengths wouldn't have to be changed? anything else recommended to change with lifters?
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Joined: Apr 2006
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From: Portland OR
St. Jude Donor '10-'11-'12
All depends on the cam and springs being used and rpms that it will run
Tech Contributor
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Yes the heads nee to be removed. If you have an early C5, it is recommended that you also change the plastic lifter trays to the newer design.. If they have a 10 on the bottom of the tray, its the old version.
I agree. Why are you changing lifters?
I agree. Why are you changing lifters?
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just thought it would be a good idea? its a 01 z06 with around 2500 miles
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Tech Contributor
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
I pulled my 02 ZO6 lifters out for a Heads/Cam/ FAST 90 upgrade and they looked new after 50,000 miles of giving it hell.
I did up grade to Caddy racing lifters only because I installed an agressive high lift cam and high seat pressure springs.
On a mostly stock application or mildly modified LS engines, changing lifters will NOT give you any advantage or added HP.
On a later model 1999+ C5's, it already has the up-dated lifter trays.
I did up grade to Caddy racing lifters only because I installed an agressive high lift cam and high seat pressure springs.
On a mostly stock application or mildly modified LS engines, changing lifters will NOT give you any advantage or added HP.
On a later model 1999+ C5's, it already has the up-dated lifter trays.
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From: Van Buren Arkansas
Wounded Warrior Escort '11
