Quote:
Originally Posted by crhenkel
so when do I use the expensive sealant and primer bmw sells to install a front crank shaft seal on a54 orN55 in my case?
The seal I am installing is the upgraded one and I did not rebuild or open the engine case. just had serpentine belt shred and need to replace the crank seal.
the sealant and primer cost more than the BMW OEM seal.
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If the belt is inside the engine then you really should remove the oil pan and maybe the valve cover to make sure there is no belt material tangled in the timing chain…. It also likes to collect in the oil pickup tube and cause oil starvation.
Also I’m not aware of an upgraded one, just two different types depending on the production date. One of them your supposed to put the sealant and the other it’s not necessary. The one with the sealant has two flat spots on either side which you are supposed to line up with the seam between the block and bed plate, and then inject the sealer into the corners with a syringe.