Pontiac G5 Heater Hose Replacement Cost

All engine cooling system hoses work the same way. They are pressed onto a connector at both ends, and either clamped, or sealed with an O-ring type seal. This provides a watertight seal between the two components being connected.

A failing heater hose may cause the vehicle to smell of engine coolant under the hood. If coolant runs onto the heater core inlet or outlet, the cabin could begin to smell of coolant and mildew. Also, the engine may being to run increasingly warmer until the vehicle is repaired. Coolant may leak onto the engine, firewall, and ground, as a defective hose may swell and burst. The worst-case scenario is engine overheating, and possible cylinder head gasket failure.

If the heater control valve is leaking, it is not advised to drive the vehicle as overheating can result from any coolant leak. In this situation, towing the vehicle to a repair facility is the best course of action. When the heater control valve is simply unresponsive, it will not affect drivability in any way, but passenger comfort may be negatively affected.

Hoses are considered “wear and tear” items, and are expected to be replaced at least once over the life of the vehicle. They tend to fail more quickly if the cooling system is not properly maintained according to the manufacturer's’ scheduled maintenance intervals.

Heater hoses must be replaced when, at any position on the hose, there is an engine coolant leak or obvious swelling. Also, replacement will be recommended if the hoses are cracked, or worn down by prolonged contact with warm or vibrating engine components.

The coolant is drained from the engine in preparation for servicing the engine cooling system. Clamps will be removed from the ends of the hoses, and the hose will be removed from the heater core and engine. The inlet and outlet flanges on the heater core and engine are cleaned in preparation for installation of the new hoses.

If the vehicle is equipped with a heater control valve, it may be a wise choice to replace it as preventive maintenance. If the heater hose is swelling, the hood should be left closed until the engine is cool. A bursting hose can lead to severe scalding.

Yes, heater hose replacement is an excellent DIY project. The informed DIYer more than likely has the experience and know-how to change hoses, belts, and several other maintenance items, without causing damage, or injury.