M271 Evo engine
05-30-2019, 02:56 PM
#1
Junior Member
Thread Starter
M271 Evo engine
So some of you know my C250 engine blew up the other day.
so why is the M271 engine such a failure, all you hear is bad things.Is it the design or just bad quality???
so why is the M271 engine such a failure, all you hear is bad things.Is it the design or just bad quality???
Last edited by Kdc36; 05-30-2019 at 03:05 PM.
05-30-2019, 04:37 PM
#2
Member
I disagree with your premise that it is a bad engine. I think like everything else there is some defective units and some good units. From your other thread the car warned you - rattling noise, if you had had it checked at that point the chain could have been replaced before the engine failed. That being said there is no reason that a properly maintained car should be having a stretched/broken chain at your mileage.
05-30-2019, 05:14 PM
#3
Junior Member
Thread Starter
I disagree with your premise that it is a bad engine. I think like everything else there is some defective units and some good units. From your other thread the car warned you - rattling noise, if you had had it checked at that point the chain could have been replaced before the engine failed. That being said there is no reason that a properly maintained car should be having a stretched/broken chain at your mileage.
Last edited by Kdc36; 05-30-2019 at 08:18 PM.
05-30-2019, 08:58 PM
#4
MBWorld Fanatic!
My M271 in my 2005 C230 is still going strong at 148000 miles, with original timing chain. I’ve used Mobil 1 0W40 since new.
05-30-2019, 10:01 PM
#5
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2010 c250 cgi, 2001 Porsche Boxster S
In my view replacement of the timing chain and tensioner should be a service item with a similar interval to a timing belt.
The M271 chain is a single chain which is prone to wear (stretching) before other parts of the engine wear.
The tensioner can also be problematic. Similar designs have been known to cause engine failure in VW/Audi products.
At any sign of rattling at start up, immediate action should be to have both items replaced. This is reasonably easy to do as a new chain can be pulled through by the old one; full teardown isn't needed. The tensioner is accessible from outside the engine.
The M271 chain is a single chain which is prone to wear (stretching) before other parts of the engine wear.
The tensioner can also be problematic. Similar designs have been known to cause engine failure in VW/Audi products.
At any sign of rattling at start up, immediate action should be to have both items replaced. This is reasonably easy to do as a new chain can be pulled through by the old one; full teardown isn't needed. The tensioner is accessible from outside the engine.
