Which fuse to pull to get cold crank without start for oil change.
Thread Starter
Member
Joined: May 2014
Posts: 125
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C63 2012 M156
Which fuse to pull to get cold crank without start for oil change.
Hi folks, I like to cold crank after oil changes to prime the system before a hot start.
http://www.mercedesmedic.com/c-class...ayout-diagram/
It looks like there are a number of fuses related to engine electronics and fuel pump.
Anyone know which to pull to get a cold crank?
http://www.mercedesmedic.com/c-class...ayout-diagram/
It looks like there are a number of fuses related to engine electronics and fuel pump.
Anyone know which to pull to get a cold crank?
Super Member
Joined: Aug 2012
Posts: 650
Likes: 20
From: Alabama
09 Carrera S, , 03 F250 CC FX4
Need to unplug the injector or ignition harness. Fuel is still in in the lines and the car could briefly fire off even with the pump fuses pulled.
Also, you do realize that the oil system is still primed after oil change, right? Oil changes do not drain all the passage ways, coolers, lifters, bearing journals, etc. Oil change only drains the pan. So, you really are not accomplishing anything.
Now if it was a new engine that had never been fired, then you would prime the system manually with the pump without rotating engine.
Also, you do realize that the oil system is still primed after oil change, right? Oil changes do not drain all the passage ways, coolers, lifters, bearing journals, etc. Oil change only drains the pan. So, you really are not accomplishing anything.
Now if it was a new engine that had never been fired, then you would prime the system manually with the pump without rotating engine.
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Joined: Aug 2011
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From: Kitchener, ON
2010 C63 AMG
What if you dump the cooler? If you do it's probably better to crank it with the starter first. I didn't bother since I did mine hot so there wasn't much time for any bleed down.
Super Member
Joined: Aug 2012
Posts: 650
Likes: 20
From: Alabama
09 Carrera S, , 03 F250 CC FX4
Think of it this way, you do not want to rotate the motor by cranking or by hand if there isn't oil in the bearings. These are the wear items that get damaged when starved for oil.
Does that make sense?
