Leaking Oil..What is this part called?
I'm back with another problem

Yesterday I was heading onto the freeway onramp when I gunned my car and it felt sluggish. My friend asked me if I checked the oil level after the last visit to the dealer. So I checked the oil level today and approx I lost 1 quart.
I started to check for leaks, so far I have had 4 leaks.
Well I found a leak. Can someone be kind enough and tell me what the part is called and if it something serious?
Thank You,
Karo
P.S. The leak was a good amount. When I rubbed my finger below the area I got a good amount of oil. I can only imagine on the freeway
Last edited by W203E35; Apr 30, 2010 at 06:06 PM.
Oil Breather was leaking
Rear Cam Plug was Leaking
Oil PCV Cover was Leaking
and now I have a leak from here.
No wonder I thought I was consuming oil. Soo many leaks (i'm not saying i'm 100% sure I am not consuming oil).
It's the "Rear Main Seal" (Number 33)

1) CYLINDER BLOCK
2) CYLINDER HEAD
3) HEAD GASKET
4) FRONT COVER
5) INTAKE VALVE
6) EXHAUST VALVE
7) VALVE SPRING SEATS
8) VALVE SEALS
9) VALVE SPRINGS
10) VALVE SPRING RETAINERS
11) VALVE KEEPER
12) ROCKER ARMS
13) VALVE LIFTERS
14) ROCKER SHAFT
15) CAMSHAFT
16) TIMING GEAR SET
17) ADJUSTER
18) VALVE
19) TIMING CHAIN
20) TENSIONER
21) CHAIN GUIDE
22) TIMING COVER
23) BALANCE SHAFT
24) WEIGHT
25) PISTON RINGS
26) PISTON
27) CONNECTING ROD
28) BEARINGS
29) FRONT CRANK SEAL
30) BEARINGS
31) THRUST WASHER
32) CRANKSHAFT
33) REAR MAIN SEAL
34) REAR MAIN SEAL RETAINER
35) PULLEY 36) OIL PAN
37) OIL PUMP
38) CHAIN
39) TENSIONER ARM
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