w156 seized with fuel in the oil rebuild
Thread Starter
Member
Joined: May 2016
Posts: 139
Likes: 8
ML63 AMG 13 SLK 55 SLK350 AMG kit 07
w156 seized with fuel in the oil rebuild
As above I have a 28000 mile late 2012 engine coming that has seized up.
It had open injector fault that thinned the oil to the point of seized.
Now I intend to put it apart but just thinking how I can turn it over to get the cam brackets on to get the heads off?
Worst can you press the pin out the timing chain
It had open injector fault that thinned the oil to the point of seized.
Now I intend to put it apart but just thinking how I can turn it over to get the cam brackets on to get the heads off?
Worst can you press the pin out the timing chain
Thread Starter
Member
Joined: May 2016
Posts: 139
Likes: 8
ML63 AMG 13 SLK 55 SLK350 AMG kit 07
I have moved on with this now, chain was not a problem as we removed the cams with the adjuster still fitted.
It had not seized up after all, its hydro locked and bent a rod, engine is other wise mint inside.
New rod coming direct from AMG £154 plus vat.
New bolt set £400!!!!!!! that the full engine and gaskets.
It had not seized up after all, its hydro locked and bent a rod, engine is other wise mint inside.
New rod coming direct from AMG £154 plus vat.
New bolt set £400!!!!!!! that the full engine and gaskets.
MBWorld Fanatic!
Joined: Feb 2007
Posts: 1,308
Likes: 80
From: Houston - Clear Lake
C63 coupe, Z3M Roadster garage queen
I have moved on with this now, chain was not a problem as we removed the cams with the adjuster still fitted.
It had not seized up after all, its hydro locked and bent a rod, engine is other wise mint inside.
New rod coming direct from AMG £154 plus vat.
New bolt set £400!!!!!!! that the full engine and gaskets.
It had not seized up after all, its hydro locked and bent a rod, engine is other wise mint inside.
New rod coming direct from AMG £154 plus vat.
New bolt set £400!!!!!!! that the full engine and gaskets.
I have never pulled down a hydrolocked engine before. Is there any damage to the cylinder wall from the piston being pushed sideways when it locked? Any way to confirm that the crank was not bent?
MBWorld Fanatic!
Joined: Nov 2012
Posts: 2,768
Likes: 419
'10 C63
I might be wrong but I think machine shops can inspect the crankshaft to make sure it's true. It seems like labor will be the killer on this job.
MBWorld Fanatic!
Joined: Dec 2012
Posts: 6,775
Likes: 1,152
From: NY
E63S | X5
It will be. A bent rod means at the very least you have to really break down and inspect everything again. You're basically rebuilding the motor.
Thread Starter
Member
Joined: May 2016
Posts: 139
Likes: 8
ML63 AMG 13 SLK 55 SLK350 AMG kit 07
No damage to the cylinder just a slight bend in the rod and it jams the end float on the crank, as soon as the crankcase was opened up the engine would turn over.
This engine is all done now, every bolt is torque to yield all over this engine and has to be replaced and there not cheap! hours spent cleaning up the parts as they have to be Very clean for the case sealant to stick.
This engine is all done now, every bolt is torque to yield all over this engine and has to be replaced and there not cheap! hours spent cleaning up the parts as they have to be Very clean for the case sealant to stick.
Trending Topics
MB World Stories
The Best of Mercedes & AMG
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
Former Vendor of MBWorld
Joined: Jan 2008
Posts: 541
Likes: 130
From: Georgetown, TX
93' 500E, 95' Corolla
I wouldn't say it's a "common" issue - but I have replaced about 15-20 M156 injectors for sticking opened and causing drivability/ misfiring. Have also had them hydrolock. I have however never seen one bend a rod - although I have heard of it. It is mostly a issue on early M156 cars. Injectors went through many revisions, and are on Rev.5 at the latest. this is indicated by the "Q" number on your injectors. Q2, Q3, Q4, Q5 - like that... it will be etched in near/under the part number
Generally, Q1/Q2 have been the only ones I've replaced, although I have heard of Q3's failing also. Q4/5 i have never seen or heard of any issues on.
Thanks!
Dave
MBWorld Fanatic!
Joined: Sep 2016
Posts: 1,175
Likes: 130
From: NY
2010 C63 2019 GLA45
I wonder if theis has anything to do with running or not running injector cleaner.
You can also take the injectors out, bring them to an injector shop and have them ultrasonically cleaned. Those people will determine any possible leaking or onset of this.
You can also take the car to Mercedes, which for around $200 will hook up the car at the rail, through a valve to a cleaning rig that put their solvent/cleaner through the injectors.
Now the downside of too much cleaning with the injectors on the car is that the oxygen sensors can be affected.
But with this factory cleaning rig, I wonder if Mercedes can't inject one at the time and figure exactly how well every injector works.
Star C5 has something to test the injectors, but to me its a crude test where injectors are turned off one at the time and you're supposed to feel the rpm drop.
You can also take the injectors out, bring them to an injector shop and have them ultrasonically cleaned. Those people will determine any possible leaking or onset of this.
You can also take the car to Mercedes, which for around $200 will hook up the car at the rail, through a valve to a cleaning rig that put their solvent/cleaner through the injectors.
Now the downside of too much cleaning with the injectors on the car is that the oxygen sensors can be affected.
But with this factory cleaning rig, I wonder if Mercedes can't inject one at the time and figure exactly how well every injector works.
Star C5 has something to test the injectors, but to me its a crude test where injectors are turned off one at the time and you're supposed to feel the rpm drop.
Super Member
Joined: Apr 2017
Posts: 549
Likes: 85
2012 Mercedes C63 AMG S
Jim G
MBWorld Fanatic!
Joined: Sep 2016
Posts: 1,175
Likes: 130
From: NY
2010 C63 2019 GLA45
For the 4 cylinder Alfa Romeo engines, (these were boxers with two banks of carburetors, one on each side), the official method, in the 80's was to use a water level vacuum gauge and then adjust the mixture screw based on the readings.
I found that adjusting the idle screw, without the gauge worked at least as good, because the imbalance was at idle, the carburetor idle jets were at different states of jet clogging, but once the engine got going, the main jets were basically not clogged at all.
So anyway, even if the Star stops the injector, it needs to continue the spark, because I guess the point is to see if the injector is leaking. If it leaks, stopping it wont stop the cylinder and the engine won't slow down.
But if the injector DOES work and the cylinder stops, there is quite the jolt.
Because this is a method based on feeling, you have to calibrate your feeling first, so you have to stop all of them so as to get a feel for what the jolt is like and make sure they're all the same.
Then start over, this time for real.
Now these jolts can't be good for the engine, or at least not for the motor mounts.
And that's why I call it crude.
But yes, there were many crude but cool things that we were doing with carburetors.
One was the ad-hoc carburetor cleaning, meaning you did not want to take it apart and clean the jets individually.
Then you revved the engine from the bay and gave it wide open gas with one hand and chocked the carburetor air mouth with the other.
The car would roar and then ..... make a muted sound and hopefully gulp the clog in the jet.
Customers and pedestrians would be freaked out.
I found that adjusting the idle screw, without the gauge worked at least as good, because the imbalance was at idle, the carburetor idle jets were at different states of jet clogging, but once the engine got going, the main jets were basically not clogged at all.
So anyway, even if the Star stops the injector, it needs to continue the spark, because I guess the point is to see if the injector is leaking. If it leaks, stopping it wont stop the cylinder and the engine won't slow down.
But if the injector DOES work and the cylinder stops, there is quite the jolt.
Because this is a method based on feeling, you have to calibrate your feeling first, so you have to stop all of them so as to get a feel for what the jolt is like and make sure they're all the same.
Then start over, this time for real.
Now these jolts can't be good for the engine, or at least not for the motor mounts.
And that's why I call it crude.
But yes, there were many crude but cool things that we were doing with carburetors.
One was the ad-hoc carburetor cleaning, meaning you did not want to take it apart and clean the jets individually.
Then you revved the engine from the bay and gave it wide open gas with one hand and chocked the carburetor air mouth with the other.
The car would roar and then ..... make a muted sound and hopefully gulp the clog in the jet.
Customers and pedestrians would be freaked out.
Last edited by Vladds; May 21, 2017 at 08:02 AM.
MBWorld Fanatic!
Joined: Sep 2016
Posts: 1,175
Likes: 130
From: NY
2010 C63 2019 GLA45
I wouldn't say it's a "common" issue - but I have replaced about 15-20 M156 injectors for sticking opened and causing drivability/ misfiring. Have also had them hydrolock. I have however never seen one bend a rod - although I have heard of it. It is mostly a issue on early M156 cars. Injectors went through many revisions, and are on Rev.5 at the latest. this is indicated by the "Q" number on your injectors. Q2, Q3, Q4, Q5 - like that... it will be etched in near/under the part number
Generally, Q1/Q2 have been the only ones I've replaced, although I have heard of Q3's failing also. Q4/5 i have never seen or heard of any issues on.
Thanks!
Dave
Generally, Q1/Q2 have been the only ones I've replaced, although I have heard of Q3's failing also. Q4/5 i have never seen or heard of any issues on.
Thanks!
Dave
The injectors never changed part number and in fact are the same part number for pfl and fl.
