CLS 63 AMG - M157 Engine Help
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Joined: Mar 2014
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A45 AMG
CLS 63 AMG - M157 Engine Help
Hey guys,
I own a 2011/12 C218 CLS 63 AMG here in Brazil (bought it recently) - with just under 20k miles. I bought it as a future classic and because I owned an E-63 AMG W212 which I loved dearly.
I thought the M157 was the most bullet proof AMG engine (and as weirdly as it seems, that is the consensus here in Brazil - with people pushing insane builds and very few reported issues), thus you can expect my horror and shock when I began researching online and saw reports of cylinder scoring, failed timing chain, failed headgaskets.
My car has no issues (only 20k miles) though I would like to make it as reliable as possible (I intend to keep it in my garage as a future classic along with a W204 C 63 I also purchased recently).
What should I replace to ensure engine is reliable in the long run? Should I replace camshaft sensors, whole timing chain and tensioner, the seal for the coolant line in the side of the engine, cylinder head (for cylinder scorings)? Since these are all engine out services, I was thinking of doing it all at once.
Thanks for the help.
I own a 2011/12 C218 CLS 63 AMG here in Brazil (bought it recently) - with just under 20k miles. I bought it as a future classic and because I owned an E-63 AMG W212 which I loved dearly.
I thought the M157 was the most bullet proof AMG engine (and as weirdly as it seems, that is the consensus here in Brazil - with people pushing insane builds and very few reported issues), thus you can expect my horror and shock when I began researching online and saw reports of cylinder scoring, failed timing chain, failed headgaskets.
My car has no issues (only 20k miles) though I would like to make it as reliable as possible (I intend to keep it in my garage as a future classic along with a W204 C 63 I also purchased recently).
What should I replace to ensure engine is reliable in the long run? Should I replace camshaft sensors, whole timing chain and tensioner, the seal for the coolant line in the side of the engine, cylinder head (for cylinder scorings)? Since these are all engine out services, I was thinking of doing it all at once.
Thanks for the help.
Last edited by CarlosAMGBR; Jul 24, 2023 at 05:44 PM.
At 20k miles you are fine if you don't want to tune, i suggest to install the non-return valves and the updated chain tensioner and camshaft sensors, change coolant with antifreeze every 2 years, use 5w40 Liqui Moly with ceratec every 3k miles, don't push hard on the engine before reaching target oil temperature and enjoy it.
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Joined: Apr 2019
Posts: 36
Likes: 15
From: Victoria
2013 CLS63 AMG S
I agree with Robert. The more you mod it, you'll eventually have to do liners and rods, but that seems about all that is required. If you want to be really sure maybe pay a mechanic to put a boreoscope camera in each cylinder on your next plug change.
