What is the cause of oil leakage in the front oil seal of the Mercedes Benz E crankshaft?

The main reasons for oil leakage in the front oil seal of the Mercedes Benz E crankshaft are as follows:

Assembly issue: The bearing surface at the rear end of the crankshaft has diagonal texture, which can result in poor sealing effect or abnormal wear of the crankshaft seal, leading to oil leakage. And during the assembly process, if the oil seal is scratched due to improper operation, it can also cause oil leakage.

Design issue: When the crankshaft oil seal is designed with two layers, the crankshaft cannot effectively compensate for the wear of the second layer seal, which can cause poor sealing and oil leakage.

Oil problem: Using unreasonable or non original engine oil cannot form an effective oil film, which will accelerate the wear of the oil seal lip and cause oil leakage.

Repair issue: During engine maintenance, if the oil seal is not properly matched and not tightly sealed, it can cause oil leakage.

Aging problem: Over time, the crankshaft oil seal of a car engine may age and break, leading to oil leakage.

The following solutions can be taken to address oil leakage in the front oil seal of the Mercedes Benz E crankshaft:

If the oil seal is slightly leaking oil, you can first clean the oil stains around the oil seal and then observe for a period of time. If the oil leakage is severe, the relevant components need to be disassembled for repair.

Be careful when disassembling to avoid damaging other engine components. After removing the oil seal, check the wear of the crankshaft front end. If there is wear, repair or replace it

When installing a new oil seal, ensure that the installation position is correct and apply an appropriate amount of lubricating oil.