Coolant Recovery System; Surge Tank - GMC G Service Manual

6B2-16 RADIATOR
1. Cap Unit
2. Pressure Valve Spring
3. Pressure Valve
4. Vacuum Valve
Figure 18 — Pressure Cap and Filler Neck
A. To Recovery Tank
L00741
Figure 20 — Testing The Pressure Cap

COOLANT RECOVERY SYSTEM

The coolant recovery system consists of a reservoir, cap
and interconnecting hose.
Maintain the coolant level between the "HOT LEVEL"
and "COLD LEVEL" markings on the tank.
The tank serves as a coolant reservoir for the radiator
core. Hoses and pipes connect the tank to the radiator and
water pump. The surge tank incorporates the cooling sys­
tem filler cap.
At regular intervals, check the tank and connecting
hoses for leaks. Keep the hose clamps and mounting bolts
tightened.
Check the mounting brackets and supports for cracks
and broken attaching parts. Check insulators and straps; if
deteriorated or loose from wear, replace.

SURGE TANK

L00744