Troubleshooting - Redline GM POWER SMOKE RLD950103GM Operation Manual

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Table of Contents

TESTING FOR LEAKS CONTINUED

Coolant System Leak Testing

Cooling system leak testing can be performed two ways

Use GM Power Smoke™ to quickly and easily find cooling system leaks either with decay testing or using

visible vapor. First, attach (optional) cooling system adaptor to pressurized coolant bottle or radiator at

cap. For decay testing, simply pressurize coolant system with air-only to manufacturers recommended

test pressure, typically 15 PSI (1 BAR). Turn off flow control valve to lock out system and watch for

decay. Inspect visually for leaking fluid. Alternatively, to perform leak test using smoke vapor, first drain

the cooling system of all fluid. Introduce pressurized vapor in to cooling system at no more than the

manufacturers recommended test pressure and use inspection light to find leaks. Retest after repairs are

performed to confirm proper repair and seal.

IMPORTANT NOTE

Many leaks in systems are considered "normal" or "within tolerance." For example,

a weep hole in a muffler is acceptable. DO NOT assume every wisp of smoke represents a

failing component. Check with vehicle manufacturer before replacing suspected failed part.