PNP
Member
My SC Auto has been off the road for 2 years. The engine has been professionally rebuilt by a shop that specialises in older equipment.
I've probabably done 2 - 3 hundred miles since she's been back on the road & I've been chasing a problem with rough idle and poor bottom end performance. Not all bad, she cruises beautifully and runs at 81 degrees C
I still have some carb work to do as she is running very rich.
I checked the valve clearance (dead cold) and came up with the following:
No 1 Inlet 0.005" , Exhaust 0.010"
No 2 Inlet 0.005", Exhaust 0.011"
No 3 Inlet 0.005' , Exhaust 0.012"
No 4 Inlet 0.007", Exhaust 0.009"
Compression test shows a consisitent 150PSI across all pots.
Will these tight clearances contribute to the rough idle/poor bottom end?
I've probabably done 2 - 3 hundred miles since she's been back on the road & I've been chasing a problem with rough idle and poor bottom end performance. Not all bad, she cruises beautifully and runs at 81 degrees C
I still have some carb work to do as she is running very rich.
I checked the valve clearance (dead cold) and came up with the following:
No 1 Inlet 0.005" , Exhaust 0.010"
No 2 Inlet 0.005", Exhaust 0.011"
No 3 Inlet 0.005' , Exhaust 0.012"
No 4 Inlet 0.007", Exhaust 0.009"
Compression test shows a consisitent 150PSI across all pots.
Will these tight clearances contribute to the rough idle/poor bottom end?