How to Repair a 1988 Toyota Corrolla Radiator

Toyota used a combination of aluminum and plastic materials for the 1988 Corolla's radiator. The tanks were plastic, while the cores were aluminum. The result was a lighter version than traditional brass radiators. It also meant that, when damaged, this radiator could be repaired easier than its traditional counterparts. While the aluminum is metal and therefore, subject to corrosion, the plastic portions have their own challenges. The hoses can also become damaged on any radiator. Some repairs are universal, while others are specific to certain radiators, depending on the type and location of the leak.

Instructions

1

Determine where the coolant is leaking from. Clean the radiator itself to see if there is a hole that is allowing coolant to escape. Check the radiator hoses and hose connectors to see if a rip or tear in a hose, or a crack or break in the connector is allowing coolant to escape. Damage to other parts of the cooling system will cause the radiator to malfunction. Alternatively, test the radiator for internal damage by pressure testing it, or by opening the radiator and filling it, then running the engine to see it there is leaking or overheating. If the coolant is leaking, the pressure in the radiator will be low. Even if the leak is not from the radiator, overheating can make the radiator prone to leaking.

2

Replace a leaking hose, and check the hose connector to make certain it is not broken or cracked. Replace the radiator cap once the rubber seal is damaged, as it will no longer hold pressure in the radiator.

3

Weld any holes or broken pieces of the radiator with a plastic tank and radiator repair kit. Using the air-free plastic welder, heat the leaking area and melt the plastic welding rod into the hole or on the edge of the break. Allow to cool and set before reinstalling the radiator.

4

Empty a container of cooling system sealant into the radiator. If either the aluminum or plastic portions have become damaged, the powder or pellets in the cooling system sealant will flow into the leaks and swell to fill them. Top off the coolant and drive the Corolla for about 30 minutes to allow the sealant to work.

5

Replace any lost coolant once the engine has cooled off by removing the radiator cap and pouring in coolant until the radiator is full.

6

Test the repair method by turning on the Corolla and allowing it to run until it heats up, checking to see if there is any coolant leaking or if the engine begins to overheat.