What & Where is the CTO Valve?

Coolant Temperature Override. It routes vacuum based on coolant temp. Could be on the intake manifold, T/Stat housing, on the block, and sometimes screwed into a fitting on a heater hose. Somewhere where it can be screwed into a water passage.

Jeeps have used 2, 3 or 5 port versi>Just working on my vaccume lines.

On an/my 86, the CTO is in the intake manifold just below and in front of the carb.

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's

Jack-Jack wrote: