Valve Seats
Posted: Sun Oct 19, 2003 10:30 pm
I am finishing up a 2nd restoration on an early 69 S4 FHC. After getting all of the bugs sorted out (The latest, all new suspension bushings and rebuild of door mechanisms). I read the section on degreeing an engine and made timing disks for the engine and cams. I felt the engine (2500 miles) needed the valves checked as low end power was way off and sounded like an exhaust valve was burned or leaking. Well #1 exhaust is bad with zero clearance and fails leak down with the cam loosened.
Question 1: :huh:
Can sintered exhaust valve seats be installed for unleaded running?
Question #2 :blink:
The engine number is G/XXXXX/B I found that the G means a fedral engine with Stromberg emissions head(US). Does the B mean "B" cams as
all the books I have read call out "C" cams for this engine? It has "B" cams installed.
Question #3
Who are the best machine shops with twin cam head experience. I don't need any more suprises. (only two valves, each on a differant clyinder were in spec.)
Any help would be great!
Question 1: :huh:
Can sintered exhaust valve seats be installed for unleaded running?
Question #2 :blink:
The engine number is G/XXXXX/B I found that the G means a fedral engine with Stromberg emissions head(US). Does the B mean "B" cams as
all the books I have read call out "C" cams for this engine? It has "B" cams installed.
Question #3
Who are the best machine shops with twin cam head experience. I don't need any more suprises. (only two valves, each on a differant clyinder were in spec.)
Any help would be great!