The Case of the Disappearing Coolant; SOLVED!

[avguy]

The water pumps I've worked on use a rubber o-ring, and the parts outfits show the '10 pump being sold with one as well. These gaskets hold up well, and you might want to check if the bolts are torqued correctly. IDK what the torque is for a 2010, but typically it's 100-150 inch lbs.

[2010AveoLT]

The water pumps I've worked on use a rubber o-ring, and the parts outfits show the '10 pump being sold with one as well. These gaskets hold up well, and you might want to check if the bolts are torqued correctly. IDK what the torque is for a 2010, but typically it's 100-150 inch lbs.

Those water pump bolts are something I need to rant about; because they used EXTERNAL TORX bolts to secure the water pump to the engine, and INTERNAL TORX bolts for the water pump pulley! Why couldn't they use more mechanic friendly hex bolts LIKE EVERYONE ELSE USES!

[Thymeclock]

Those water pump bolts are something I need to rant about; because they used EXTERNAL TORX bolts to secure the water pump to the engine, and INTERNAL TORX bolts for the water pump pulley! Why couldn't they use more mechanic friendly hex bolts LIKE EVERYONE ELSE USES!

You already know the answer: They are not interested in being "mechanic friendly". GM is interested in you giving up on your Aveo in the hope that they can sell you a newer GM product.