Coolant Temperature Overide Joe Fulton Salinas, CA --- farna@xxxxxxx wrote: > 3. Finally, check or replace the CTO valves. There > is one in the side of the block under the manifolds, > and one or two more. IIRC the one under the > manifolds controls vacuum for the distributor > advance. When the engine is cold it allows vac from > the intake to pull the advancs, when the engine is > warm a shuttle inside the valve moves and switches > advance to ported vacuum from the carb. Hmmm... I > may have that backwards, but it switches from > manifold to ported. I've forgot what CTO stands > for.. "T" is temperature, I do recall that!! > >