LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Jeep >> 1990 >> Wrangler S >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Cooling System Specifications >> Testing >> Pressure Testing >> Radiator Cap
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Radiator Cap

Visually inspect radiator cap, then dip cap into water and connect to tester. Pump tester to bring pressure to upper limit of cap specification. See Fig 1. See COOLING SYSTEM SPECIFICATIONS  table.

Fig 1: Testing Radiator Pressure Cap
G121149Courtesy of CHRYSLER MOTORS.