M157 Timing chain stretched?
#1
Senior Member
Thread Starter
M157 Timing chain stretched?
I'm gonna need help here with something I am dealing with on my m157 CLS63 with 102k miles
car has been great until about a week ago
I started getting error codes P0017 and P0018
the only symptom I experienced was the car cranking a little longer on startup
I took the car to my trusted indy mechanic as it is out of warranty now, and after a few days he came back with the news he believes my timing chain is stretched and just a little off
he says the timing chain is not making any noise but he believes its just off enough to throw a code
I trust his diagnosis but I need some more opinons from anyone else that has seen this. Everyone else with similar scenarios have much different symptoms than mine so i'm confused if this is really what it is
Needless to say its a very long and expensive repair so I dont want to do it unless Im sure thats what it is. My mechanic has also suggested I could get it diagnosed at MB and find out for sure. Has anyone else dealt with this? can you confirm this is what it is? is this a job an indy mechanic can tackle? he is saying labor would be about 20 hours or so for repair... sounds really bad need to weigh my options.
car has been great until about a week ago
I started getting error codes P0017 and P0018
the only symptom I experienced was the car cranking a little longer on startup
I took the car to my trusted indy mechanic as it is out of warranty now, and after a few days he came back with the news he believes my timing chain is stretched and just a little off
he says the timing chain is not making any noise but he believes its just off enough to throw a code
I trust his diagnosis but I need some more opinons from anyone else that has seen this. Everyone else with similar scenarios have much different symptoms than mine so i'm confused if this is really what it is
Needless to say its a very long and expensive repair so I dont want to do it unless Im sure thats what it is. My mechanic has also suggested I could get it diagnosed at MB and find out for sure. Has anyone else dealt with this? can you confirm this is what it is? is this a job an indy mechanic can tackle? he is saying labor would be about 20 hours or so for repair... sounds really bad need to weigh my options.
#2
MBWorld Fanatic!
Crank Position Sensor??? This will cause sluggish starting every time when acting up. I have not heard of a timing chain stretching issue on these cars, but maybe I missed it. Your Indy might be guessing a bit here.
#3
Senior Member
Thread Starter
crankshaft positoin sensor was the only one I did not know how to check myself. so I dont doubt it could be that. also my mechanic saying i could bring it to MB for second diagnosis also implies that hes not 100% sure either. Hes a guru with M113k and other mercedes but he hasnt worked on many m157
#4
Out Of Control!!
Join Date: Jun 2004
Posts: 11,412
Received 1,886 Likes
on
1,323 Posts
2014 E63S; AMS 100 octane ecu tune; edok tcu tune; BB intakes; dyno tuned
You would be wise to have benz take a look or another Indy
The following users liked this post:
amgboy916 (01-15-2019)
#5
Senior Member
Thread Starter
im thinking thats the move as of right now.
if it is true
and i do have to have this engine out job done... im definitely considering doing some upgrades while the engine is out
if it is true
and i do have to have this engine out job done... im definitely considering doing some upgrades while the engine is out
#6
MBWorld Fanatic!
And a "Thank You" for Peter and I got nothing? hahahaha Just messin with ya.
Cheers
The following 2 users liked this post by Vrodman:
amgboy916 (01-15-2019),
صخر عمر (01-23-2021)
#7
Senior Member
Thread Starter
If it did happen to be a stretched timing chain (doubtful), I think that can be replaced without pulling the motor. Radiator and fans and such only need to be pulled. Not certain on these particular motors installed in a CLS though.
And a "Thank You" for Peter and I got nothing? hahahaha Just messin with ya.
Cheers
And a "Thank You" for Peter and I got nothing? hahahaha Just messin with ya.
Cheers
The following users liked this post:
صخر عمر (01-23-2021)
Trending Topics
#8
Out Of Control!!
Join Date: Jun 2004
Posts: 11,412
Received 1,886 Likes
on
1,323 Posts
2014 E63S; AMS 100 octane ecu tune; edok tcu tune; BB intakes; dyno tuned
#10
Out Of Control!!
Join Date: Jun 2004
Posts: 11,412
Received 1,886 Likes
on
1,323 Posts
2014 E63S; AMS 100 octane ecu tune; edok tcu tune; BB intakes; dyno tuned
#11
MBWorld Fanatic!
ive just ordered a cps sensor. I’m sure it’s in the same location as the m113k. It’s too damn cold right now to mess with the car.
#12
Senior Member
Thread Starter
I have located the part and part number its about $40 but I have no idea where its located on the engine and cannot find anything online. do you know where it is for your car? that'll at least give me an idea if I can do it or should take it to the shop
#13
MBWorld Fanatic!
It might not help, but I believe on my 2000 E55 it was actually on the flywheel side of the motor. I'm sure someone knows here and will chime in soon.
#14
Senior Member
Most likely your CPS any misfire codes or rough idle or excessive rattle on start up? If it is a stretched timing chain I believe we may be seeing more of these especially in the early M157's that don't have the revised camchain tensioner and guides. Overtime repeated cold starts and no initial oil circulation to this area could be causing the chain to stretch, I'm no mechanic but kind of makes sense.
#15
Senior Member
Thread Starter
Most likely your CPS any misfire codes or rough idle or excessive rattle on start up? If it is a stretched timing chain I believe we may be seeing more of these especially in the early M157's that don't have the revised camchain tensioner and guides. Overtime repeated cold starts and no initial oil circulation to this area could be causing the chain to stretch, I'm no mechanic but kind of makes sense.
#16
Senior Member
no misfire codes or rattle or rough idle. I have heard a lot about timing chain issues for m157 but everyone else reports noise from the timing chain on startup. i have never experienced that and my mechanic confirmed theres no noise. also everyone else with timing chain issues has a plethora of other codes along with it and several symptoms. only symptom ive noticed is the additonal crank to start so thats why I have doubts. If it is timing chain. it sucks but i'll deal with it. just want to make sure I dont waste time or money if that wasnt the cause. mine is a 12 so perhaps I don't have the updated tensioner. that might be an upgrade i should do if the timing chain really is stretched
#17
Super Member
Crank sensor isn't the problem. Don't put an off brand $40 crank sensor in your car please. If your guy isn't certain then find a new shop who is. These cars aren't rocket science, but finding qualified people to fix them is getting harder by the day. 157 timing chain isn't a job for someone who isn't familiar with the platform
The following users liked this post:
OkayThen (09-26-2021)
#18
Senior Member
Thread Starter
Crank sensor isn't the problem. Don't put an off brand $40 crank sensor in your car please. If your guy isn't certain then find a new shop who is. These cars aren't rocket science, but finding qualified people to fix them is getting harder by the day. 157 timing chain isn't a job for someone who isn't familiar with the platform
#19
MBWorld Fanatic!
the CPS in the red circle
it’s back of the driver side. You can access from the top, but it’s a pita. I did it when I R&R the heater hose block. Good luck
The following users liked this post:
amgboy916 (01-23-2019)
#20
MBWorld Fanatic!
Hey, we have the same problem on our 2nd CLS63S - the cranking takes sometimes around 5 seconds. The diagnostic code is P001785 which means "camshaft position is off to the crankshaft". I suspect my colleague who drives the car, revs it every day when stationary (I know - stupid but he can't help himself) and made this "damage" by putting the engine under pressure without real oil pressure so the valve position got off because they couldn't close like they normally would (theory).
Let me know how it goes with your car.
I hope this helps.
Let me know how it goes with your car.
I hope this helps.
The following users liked this post:
OkayThen (09-26-2021)
#22
MBWorld Fanatic!
You might give the following a try.
About 8 years ago when I had 10 years on my E55 at that time, I could not get the engine to fire while at a store parking lot. I called my Indy and he said to take a couple of water bottles and pour them in the general location that agrees with the picture of the sensor above. He said gunk can just build up around the CPS and cause the issue. So I went and bought a couple of 12 ouncers and tried it. And BOOM, it fired up! And, it actually never came back either. Now I'm not sure if this will work on a W212, but I don't think it will do any damage to try it.
About 8 years ago when I had 10 years on my E55 at that time, I could not get the engine to fire while at a store parking lot. I called my Indy and he said to take a couple of water bottles and pour them in the general location that agrees with the picture of the sensor above. He said gunk can just build up around the CPS and cause the issue. So I went and bought a couple of 12 ouncers and tried it. And BOOM, it fired up! And, it actually never came back either. Now I'm not sure if this will work on a W212, but I don't think it will do any damage to try it.
#24
Senior Member
Thread Starter
I am very appreciative of this picture it helps alot althogh I have still not been able to see/locate it from the top I'll have to get under and take a look but thnak you for the picture
#25
Senior Member
Thread Starter
Hey, we have the same problem on our 2nd CLS63S - the cranking takes sometimes around 5 seconds. The diagnostic code is P001785 which means "camshaft position is off to the crankshaft". I suspect my colleague who drives the car, revs it every day when stationary (I know - stupid but he can't help himself) and made this "damage" by putting the engine under pressure without real oil pressure so the valve position got off because they couldn't close like they normally would (theory).
Let me know how it goes with your car.
I hope this helps.
Let me know how it goes with your car.
I hope this helps.
The following users liked this post:
OkayThen (09-26-2021)