GM Service Manual Online
For 1990-2009 cars only

Checks

Actions

A leak in the radiator

Replace a damaged radiator.

A leak in the following locations:

    • The surge tank
    • The hose

Replace the following parts, as needed:

    • The surge tank
    • The hose

Loose or damaged radiator hoses, heater hoses, and connections

    • Reseat the hoses.
    • Replace the hoses or the clamps.

Leaks in the coolant pump seal

Replace the coolant pump seal.

Leaks in the coolant pump gasket

Replace the coolant pump gasket.

An improper cylinder head torque

Tighten the cylinder head bolts to specifications.

Replace the cylinder head gasket, if needed.

Leaks in the following locations:

    • The intake manifold
    • The cylinder head gasket
    • The cylinder block plug
    • The heater core
    • The radiator drain plug

Repair or replace any components, as needed, to correct the leak.