427 in 02 T/A?
This is a discussion on 427 in 02 T/A? within the Internal Engine forums, part of the LSx Technical Help Section category; Originally Posted by blackSS01 Haven't heard shit about sodium valves, running them on my motor. Came stock on C5 Z06's. ...
07-01-2010, 12:51 PM #21
- Join Date
- Jan 2006
- Shepherd, Michigan
blacker than wesleysnipes
- 98' trans am
the problem is exhaust valves are breaking. Theories are that the extended amount of heat that the exhaust valves see cause them to expand and basically wear the shit out of the guides. Another theory (one i believe) is that the large majority of those owners who had problems tracked there cars at RR events. They used the oem recommend 5w-30. this is a huge no no in RR as "heavier" oil is a must. so take it as you will but i personally wouldn't be worried. If i ever run a 427 with the ls7 heads i will be upgrading the exhaust valves to a 1 piece titanium set up to match the intake.
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