The crankshaft cuffs are replaced when oil leaks appear from under the cuffs, as well as during engine overhaul

Replacing the front crankshaft oil seal

We prepare the car for the task and install it on the observation ditch or lift

Disconnect the negative battery terminal

How to replace the crankshaft cuffs of the Mazda engine 6

We remove the cover of the gas distribution mechanism, as indicated in the article "How to replace the timing chain of a Mazda 6 car"

How to replace the crankshaft cuffs of the Mazda engine 6

We press out the old oil seal with a suitable mandrel

Lubricate the working surface of the new cuff

How to replace the crankshaft cuffs of the Mazda engine 6

We install the cuff, orienting it with the working edge inside the engine, and press it all the way with a mandrel or a suitable tool head

Replacing the rear oil seal of the engine crankshaft

Removing the gearbox

Removing the clutch

Removing the flywheel

We inspect the oil seal. If the tightness of the oil seal is broken, an oil leak will be visible in its lower part

How to replace the crankshaft cuffs of the Mazda engine 6How to replace the crankshaft cuffs of the Mazda engine 6

Unscrew the six bolts securing the oil seal holder to the cylinder block

We carefully pry the oil seal holder with a screwdriver

How to replace the crankshaft cuffs of the Mazda engine 6

And we remove the holder assembly with an oil seal

Lubricate the working edge of the new oil seal with engine oil

We install the oil seal holder on the cylinder block, orienting the oil seal with the working edge inside the engine and carefully fill the working edge on the crankshaft neck

Evenly crosswise tighten the mounting bolts of the oil seal holder with a torque of 8-11 Nm