Rear main seal leak?
Thread Starter
Super Member
Joined: Sep 2007
Posts: 754
Likes: 12
...
Rear main seal leak?
Hi Guys,
Just took my car in for an oil change and was told the rear main seal is leaking which after researching have come to find out its pretty common on these. My car has 71k. They said it will take about 7-9 hrs to fix at the dealership. I asked to speak with to tech to find out how bad it was but she said he was too busy to speak, terrible cust svc these days!
Does this labor sound right to you? It is ok to keep driving it? Anything I should need to know please advise! Cannot see leak because I believe the plastic piece is covering it, correct?
Thx!!!
Just took my car in for an oil change and was told the rear main seal is leaking which after researching have come to find out its pretty common on these. My car has 71k. They said it will take about 7-9 hrs to fix at the dealership. I asked to speak with to tech to find out how bad it was but she said he was too busy to speak, terrible cust svc these days!
Does this labor sound right to you? It is ok to keep driving it? Anything I should need to know please advise! Cannot see leak because I believe the plastic piece is covering it, correct?
Thx!!!
MBWorld Fanatic!
Joined: Nov 2009
Posts: 3,589
Likes: 68
From: Texas
C63 507 AMG DA Car #19
Were you getting a check oil light or low oil level warning?
If not then I suspect the leak is very slight and you would not have issues driving it as long as you make sure you the right oil level occasionally.
There are many cars running the roads with a leaking front or rear main leak.
If not under warranty I would check with a good ind shop around your area for another quote.
If not then I suspect the leak is very slight and you would not have issues driving it as long as you make sure you the right oil level occasionally.
There are many cars running the roads with a leaking front or rear main leak.
If not under warranty I would check with a good ind shop around your area for another quote.
Thread Starter
Super Member
Joined: Sep 2007
Posts: 754
Likes: 12
...
Were you getting a check oil light or low oil level warning?
If not then I suspect the leak is very slight and you would not have issues driving it as long as you make sure you the right oil level occasionally.
There are many cars running the roads with a leaking front or rear main leak.
If not under warranty I would check with a good ind shop around your area for another quote.
If not then I suspect the leak is very slight and you would not have issues driving it as long as you make sure you the right oil level occasionally.
There are many cars running the roads with a leaking front or rear main leak.
If not under warranty I would check with a good ind shop around your area for another quote.
Will the leak get much worse over time? Thx!
2002 CLK55
Last edited by RPB; Sep 1, 2012 at 07:57 PM.
Junior Member
Joined: Nov 2004
Posts: 20
Likes: 0
03 CLK55 AMG
Hi Guys,
Just took my car in for an oil change and was told the rear main seal is leaking which after researching have come to find out its pretty common on these. My car has 71k. They said it will take about 7-9 hrs to fix at the dealership. I asked to speak with to tech to find out how bad it was but she said he was too busy to speak, terrible cust svc these days!
Does this labor sound right to you? It is ok to keep driving it? Anything I should need to know please advise! Cannot see leak because I believe the plastic piece is covering it, correct?
Thx!!!
Just took my car in for an oil change and was told the rear main seal is leaking which after researching have come to find out its pretty common on these. My car has 71k. They said it will take about 7-9 hrs to fix at the dealership. I asked to speak with to tech to find out how bad it was but she said he was too busy to speak, terrible cust svc these days!
Does this labor sound right to you? It is ok to keep driving it? Anything I should need to know please advise! Cannot see leak because I believe the plastic piece is covering it, correct?
Thx!!!
Thread Starter
Super Member
Joined: Sep 2007
Posts: 754
Likes: 12
...
An independent repair technician stated to ensure the PCV orifice in each valve cover is not clogged. The oil vapor after thousands of miles of use and heat from the engine cause the orifices in the valve covers to become clogged. When the orifices are clogged the engine will build pressure in the engine which forces oil past the rear main seal. Although the outside diameter of the metal vent piece in each valve cover is about .5" diameter the orifice is really small to ensure the engine is venting air pressure and not oil. The small orifice causes the hot oil vapor to condense ensuring most of the oil stays in the engine. Prior to removing the rubber hose attached to each valve cover, purchase two new PCV hoses because they will be hard and brittle from age and heat.Take a stiff piece of wire (coat hanger wire) push through each of the orifices in the valve covers to clear. This repair should relieve the pressure from the rear main seal. This simple repair will save hundreds if not thousands of dollars.
