N62 4.8 Oil Thermostat Gasket Leak (2007 X5)

[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.

[Entropy]

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.

Definitely the oil cooler thermostat gasket. Did you also do the oil line o-rings that attach to the thermostat (P/N 17227800958)?

[LightlyToasted]

Originally Posted by Entropy

Did you also do the oil line o-rings that attach to the thermostat (P/N 17227800958)?

I chose to replace these o-rings, rather than risk having to do this job again. The dealer charged me $11 each for the o-rings. The old ones looked fine - not flat, hard, and brittle like the thermostat gasket.