See Figures 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10
The upper and lower radiator hoses, along with the heater hoses should be checked periodically for deterioration, leaks, and loose clamps. GM recommends that this be done every 12 months or 15,000 miles (24,100 km). For your own peace of mind, it may be wise to check these items at least every spring and fall, since the summer and winter months wreak the most havoc with your cooling system. Expect to replace the hoses about every 24 months or 30,000 miles (48,300 km).
REMOVAL & INSTALLATION
- Drain the cooling system.
- Loosen the hose clamps at each end of the hose to be removed. If the clamps are of the type which have a screw positioned vertically in relation to the hose, loosen the screw and gently tap the head of the screw towards the hose. Repeat this until the clamp is loose enough. If corrosion on the clamp prevents loosening in this manner, carefully cut the clamp off with cutters and replace the clamp with a new one.
- Once the clamps are out of the way, grasp the hose and twist it off of the tube connection using only moderate force. If the hose won't break loose, DON'T use excessive force - doing so can easily damage the heater core and/or radiator tubes. Using a razor blade, carefully slit the portion of the hose which covers the connection point, peel the hose off of the connection and disconnect the hose.
- Remove the hose and clean the connection points.
- Slip the (loosened) clamps onto the hose ends and install the new hose, being careful to position it so that no interference.
- Position the clamps at the ends of the hoses, beyond the sealing bead, and centered on the clamping surface. Tighten the hose clamps with a screwdriver - don't use a wrench on the screw heads to tighten them, as overtightening can damage the hose and/or connections points.
- Refill the cooling system (detailed later) and check for leakage.
- If so equipped, disconnect the routing clamps from the hose.