Originally Posted by Xor

Don't wait for too long. Mine was leaking for a year - approx a quart/mo. A week ago it deteriorated to a glass/min. Luckily it had happened next to home. Don't even want to think what would I do in the middle of highway.

Entropy, take off the protection and check where the leak comes from. If you can't see the location and it's on the left side - welcome to the club.