M-Class (W164) Produced 2006-2011: ML280CDI, ML320CDI, ML420CDI, ML350, ML500, ML550

Oil leak, rear crankshaft seal

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 06-23-2023 | 04:01 AM
  #1  
PMo's Avatar
PMo
Thread Starter
Newbie
 
Joined: Jun 2023
Posts: 2
Likes: 0
2010 ML350 Bluetec
Oil leak, rear crankshaft seal

Hi all.

My 2010 ML350 Bluetec has a leak at the back of the engine. My tech says it's the rear crankshaft seal. I'm a bit skeptical because I haven't seen much complaints about this seal leaking. Could it be a misdiagnosis? Could it be the oil cooler?

I bought the car used with 180k miles on the engine. I now have around 195k on it. I lose around a quart of oil in a month or month and half. Any suggestions are appreciated. Thanks.
Old 06-23-2023 | 07:57 AM
  #2  
DLB_Adelaide's Avatar
Member
 
Joined: Mar 2023
Posts: 105
Likes: 14
GL320 X164 OM642 722.902
Originally Posted by PMo
Hi all.

My 2010 ML350 Bluetec has a leak at the back of the engine. My tech says it's the rear crankshaft seal. I'm a bit skeptical because I haven't seen much complaints about this seal leaking. Could it be a misdiagnosis? Could it be the oil cooler?

I bought the car used with 180k miles on the engine. I now have around 195k on it. I lose around a quart of oil in a month or month and half. Any suggestions are appreciated. Thanks.
Borescope will give you an answer. Plenty of decent scopes in amazon.
Old 06-24-2023 | 04:01 AM
  #3  
BlackML550's Avatar
Super Member
 
Joined: Jun 2014
Posts: 752
Likes: 312
From: Melbourne, Australia
2010 ML550 VIN WDC1641722A564750, 2010 B180
Your instinct is correct. Chances are its the oil cooler seal that's leaking rather than the rear main seal, which as you said, there isn't alot of evidence for. Make sure your talking to an experienced MB mechanic. Indies are best. If the fella you spoke to didnt mention the oil cooler seals, thats a red flag given how prevalent this issue is for the diesels.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Oil leak, rear crankshaft seal



All times are GMT -4. The time now is 09:06 PM.