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Service Procedure





INSPECTION PROCEDURE

1. Raise hood and determine if the heater inlet hose is routed below the heater outlet hose as shown in the "INCORRECT" illustration.

2. If the heater inlet hose is installed under the heater outlet hose, perform the "REROUTING PROCEDURE" below.

3. If the heater inlet hose is routed as shown in "CORRECT" illustration, no further action is necessary. Install a Campaign Identification Label.


REROUTING PROCEDURE

1. Park the vehicle on a level surface.

2. Remove the pressure cap from the radiator when the engine is cool by:

Slowly rotating counterclockwise to detent (Do NOT press down while rotating).

Wait until any left over pressure is released (indicated by a hissing sound).

After all hissing stops, press down on cap while continuing to rotate counterclockwise.

CAUTION:
TO AVOID BEING BURNED, DO NOT REMOVE RADIATOR CAP WHILE THE ENGINE IS AT NORMAL OPERATING TEMPERATURE. COOLING SYSTEM WILL RELEASE SCALDING FLUID AND STEAM UNDER PRESSURE IF THE CAP IS REMOVED WHILE THE ENGINE AND RADIATOR ARE STILL HOT.

3. With a clean drain pan in place, open radiator drain valve.

4. Once enough fluid has drained out of the radiator:

Remove the screw from the heater outlet hose bracket to the cowl panel.

Remove the heater outlet hose from the heater core tube (inboard tube) by squeezing both release tabs of quick connect fitting at the base of the heater core tube and pulling on the pipe to disengage the fitting (see quick connect fitting illustration).

5. Inspect the inlet hose for signs of severe chafing and/or wear through (note that very few hoses are expected to be chafed or worn). If an inlet hose does require replacement, install a new hose following the procedures on Pages 1B-26 and 1B-27 of the 1992 Oldsmobile Custom Cruiser Service Manual.


6. Reposition the outlet hose properly (under the heater inlet hose), align orientation tabs with groves and push the hose fitting into place, then pull back on the hose to ensure proper installation of the connector.

IMPORTANT:
Make sure that the two "O" rings and nylon spacers are in position in the quick connect fitting prior to reinstalling the outlet hose connection.

Also, make certain the quick connect fitting orientation tabs are aligned correctly before connecting the quick connect fitting. If the quick connect fitting is incorrectly connected, coolant leakage and damage to parts may occur. The quick connect fitting must be pushed on, then pulled back to verify proper connector engagement.

Do not rely on an audible click or visual verification to check for a proper connection. If it is necessary to repair the quick connect, use the approved service kit which can be obtained from GMSPO (P/N 10164697).

7. Install the outlet hose bracket and screw to the cowl panel.

8. Check the outboard inlet hose for clearance to the A.I.R. pipe. Also, check to assure the protective sleeve on the heater outlet hose is under the heater inlet hose.

9. Close the radiator drain valve, and pour the drained coolant into the radiator until the tank is filled.

10. Start the engine and run five minutes (or until the inlet hose is hot).

11. Top off the radiator with coolant and install cap.

12. Fill the coolant recovery reservoir to the hot line with a 50/50 mix of water and ethylene glycol which meets GM specification 1825-M (P/N 1052753), or equivalent.

13. Install a Campaign Identification Label.

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