This week, we had a 2007 Mazda 3 with an oil leak that needed to be diagnosed and repaired.

We found the engine's rear crankshaft seal was leaking. Replacement of the seal required removal of the transmission, clutch assembly, and flywheel for access to the seal.

After removing the transmission, it was determined that the clutch was worn and near the end of its life. Replacing the clutch at this time would be a good value since 90% of the labor had already been done to access the crankshaft seal. The flywheel was resurfaced for smooth clutch engagement and to prevent clutch chatter.

After replacing the crankshaft seal, an oil & filter change service was performed.

After the repair was completed, the vehicle was test-driven to confirm that all repair work was working correctly.

Contact Hoover Street Auto in Ann Arbor for all your Mazda repair and service.

Mazda 3 engine oil leak repair in Ann arbor, MI
Mazda 3 engine oil leak repair at Hoover Street Auto Repair in Ann Arbor, MI

 

Mazda 3 engine crankshaft rear oil seal replacement at Hoover Street Auto Repair in Ann Arbor, MI
Rear of engine with transmission removed to replace crankshaft rear oil seal.

 

Mazda 3 crankshaft rear oil seal leak repair in Ann Arbor, MI
Mazda 3 new rear crankshaft seal (black rubber ring in middle of photo).

 

Mazda 3 new and old clutch assembly
Mazda 3 clutch replacement. New clutch at top, old clutch at bottom of photo.
Mazda 3 resurfaced flywheel
Mazda 3 resurfaced flywheel at Hoover Street auto Repair in Ann Arbor, MI. Wear marks and heat spots removed for smooth clutch operation and no chatter.