M113 V8 Kompressor Platform Technical discussion relating to models sharing the M113 V8 5.5L Kompressor. Including SL55 AMG, CL55 AMG, S55 AMG, E55 AMG, CLS55 AMG, G55 AMG, SLR (M155).
Sponsored by:
Sponsored by:

R500 M113.971

Old 10-17-2018, 12:18 AM
Thread Starter
Join Date: Oct 2018
Location: Central Coast CA
Posts: 1
Likes: 0
Liked 0 Times in 0 Posts
R500 M113.971

Hi all!

A bit of a lengthy story...

Got an 06' R500 with now 113k and to me it needs a head gasket on both banks. At 90k I had the heater core go, so replaced that(holy big job). After a while I began getting a small coolant leak somewhere(added coolant every month or so) and a small motoring noise from the engine(dieseling could also be the term). Thought from the noise I had a plug issue, did all 16 plugs.. same noise. No peanut butter oil cap, no mix of oil/coolant. So was kind of stumped, no performance issues or any detectable thing to point to a possible going head gasket. Got a strong 21mpg. Fast forward to 113k and after a 114 F degree day I had it overheat which ruptured a coolant hose from over pressure. Replace the entire cooling system down to the aux pump. I have codes on cyl 6&7 for mis fire. Engine smokes white and the idle is garbage unless I shut it off and restart fast to trick it. Constant bubbles in the coolant.


I am going to rip it apart and do a head gasket on both banks. Is there anything else any of you would think that could also be the cause? Coil issue? Intake?

Any tips or insight on this beast would be appreciated! i.e. do the intake manifold, valves, etcc while the head are out.

This is my first venture into MB so I don't know this engine at all. One guy local to me said these never blow head gaskets and to replace the motor... (not sure that's true and I have zero metal/alum in the pan or anywhere)

Last is the bolts... head bolts, would you replace with new? Also is it true the cam gear to cam bolt is one time use only and to get a new one?

Any help I appreciate to the utmost! If you have a diesel anything I can return the favor!

codi is offline  

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

Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:

Quick Reply: R500 M113.971

Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.
  • Ask a Question
    Get answers from community experts
Question Title:
Your question will be posted in: