Crankshaft pulley fell off...Is my crankshaft still reusable?
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C63 AMG
OP - was there anti seize like paste on the threads of the bolt. Also, can you post a picture of the head of the bolt?
Regarding removal of the remaining key, good advice above.
Looking at the pictures I can't tell if the balance key is shared with what I believe is the timing gear inside beyond the seal or if the balancer has its own key.
I'd also consider using a punch to lightly tap it out. The groove should extend to the end of the crank but I can't see that in the pictures. If it does use the punch to tap it perpendicular, away from the crank.
Regarding removal of the remaining key, good advice above.
Looking at the pictures I can't tell if the balance key is shared with what I believe is the timing gear inside beyond the seal or if the balancer has its own key.
I'd also consider using a punch to lightly tap it out. The groove should extend to the end of the crank but I can't see that in the pictures. If it does use the punch to tap it perpendicular, away from the crank.
Key looks like it may go into the gear
Hard to tell from the parts diagram
If someone has the online shop manual a detailed diagram would really help the guy out
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C63 AMG
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the keyway looks like it's broken in half from the pics. I dont think you can get them separately. This repair is probably going to be impossible with the engine in the car even if you can source a keyway. The front timing cover will need to be removed, which requires the oil pans to come off. At this point you might as well just pull the motor out. Do it right, replace your headbolts with the arp studs, throw some headers on it while it's all apart too.
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2008 Mercedes C63
the keyway looks like it's broken in half from the pics. I dont think you can get them separately. This repair is probably going to be impossible with the engine in the car even if you can source a keyway. The front timing cover will need to be removed, which requires the oil pans to come off. At this point you might as well just pull the motor out. Do it right, replace your headbolts with the arp studs, throw some headers on it while it's all apart too.
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C63 AMG
let me see if I understand this
pulley item 31 slips onto 18 the timing gear
secured by a thru bolt and a key in a pulley recess and the gear keyway
bolt goes into the crank, key into the timing gear slot
are you saying the key and pulley must be bought as a set?
if he can extract the broken key can he just insert the new one?
or are you saying something on the gear itself is broken?
ouch
pulley item 31 slips onto 18 the timing gear
secured by a thru bolt and a key in a pulley recess and the gear keyway
bolt goes into the crank, key into the timing gear slot
are you saying the key and pulley must be bought as a set?
if he can extract the broken key can he just insert the new one?
or are you saying something on the gear itself is broken?
ouch
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2008 Mercedes C63
let me see if I understand this
pulley item 31 slips onto 18 the timing gear
secured by a thru bolt and a key in a pulley recess and the gear keyway
bolt goes into the crank, key into the timing gear slot
are you saying the key and pulley must be bought as a set?
if he can extract the broken key can he just insert the new one?
or are you saying something on the gear itself is broken?
ouch
pulley item 31 slips onto 18 the timing gear
secured by a thru bolt and a key in a pulley recess and the gear keyway
bolt goes into the crank, key into the timing gear slot
are you saying the key and pulley must be bought as a set?
if he can extract the broken key can he just insert the new one?
or are you saying something on the gear itself is broken?
ouch
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C63 AMG
Just a thought, but you could try and drill and tap a portion of the broken key once you have the tap in there you will have something to pull on. I have done something similar with success.
Last edited by immelman; Dec 2, 2014 at 04:57 PM.
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2008 Mercedes C63
yeah, you should tell the previous owner that.
There's no much room in the front of the motor to work with or I would of already tried this.
There's no much room in the front of the motor to work with or I would of already tried this.
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C63 AMG
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Ford Truck, 2014 C63 AMG 507
I've done this a few times under different circumstances.
Drill and tap the face of the key where it's broken off. Thread a screw into it and try to work it out.
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Crap Evo pulley to spin the Weistec with insufficient clamping torque?
Yours isn't the first to have worked itself loose. Good luck.
Pin it if you're still able then 250nm + 90° like the Stage 3 setups:
Yours isn't the first to have worked itself loose. Good luck.
Pin it if you're still able then 250nm + 90° like the Stage 3 setups:
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C63 AMG
Does the gear have to be removed?
Does the keyway go all the way thru the gear? eg, not a blind slot but open on both ends
A sc puts a lot more stress on the belts/pullies
Normally 5-10 hp for the alt/pumps/etc
If the sc makes 150 hp at 70% eff that means the belt must supply 45 hp to drive the sc
The net goes to the crank
That translates to a lot of torque on the drive pullie
T = 5252/6500 x 45 hp ~ 35 lb ft
At a 1.5" radius that is 300 lb in shear on the key
4-5 times what it sees non sc'ed or stock
Eye balling it that pin is good for maybe 500 lb in shear, with no reduction for the impulse fatigue of throttle/off throttle
If the key is not sold seperately they probably reused the old one and may have damaged during the new pulley install
Regardless major suckage
Does the keyway go all the way thru the gear? eg, not a blind slot but open on both ends
A sc puts a lot more stress on the belts/pullies
Normally 5-10 hp for the alt/pumps/etc
If the sc makes 150 hp at 70% eff that means the belt must supply 45 hp to drive the sc
The net goes to the crank
That translates to a lot of torque on the drive pullie
T = 5252/6500 x 45 hp ~ 35 lb ft
At a 1.5" radius that is 300 lb in shear on the key
4-5 times what it sees non sc'ed or stock
Eye balling it that pin is good for maybe 500 lb in shear, with no reduction for the impulse fatigue of throttle/off throttle
If the key is not sold seperately they probably reused the old one and may have damaged during the new pulley install
Regardless major suckage
Last edited by Ingenieur; Dec 2, 2014 at 06:51 PM.
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C63 AMG
Side note
I would try anything before pulling the engine and opening it up
Glue or weld a pick to it
Penetrating oil and heat, hit it with compressed air to try and blow it out
Drill ez out
What ever
Does the cover need to come off to replace the seal?
I would try anything before pulling the engine and opening it up
Glue or weld a pick to it
Penetrating oil and heat, hit it with compressed air to try and blow it out
Drill ez out
What ever
Does the cover need to come off to replace the seal?
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2008 C63, 2008 ML550, 2014 KTM 500 XC W, John Deere 990
I have the same Evosport pulley. It leaked oil after installation due to geometry differences from stock and installation error. I had to have a new seal put in. Its been two years and still no leaks. My point is: be sure to get a new seal and be very careful about the install. Based on your pics, I would not consider changing the crank.
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C63 AMG
You don't need to pull the engine. You just need the 8 rib system from the stage 3.
The stage 3 you drill the crank for two more key ways.
You need to get that broken keyway out of the crank. Hook something behind it that you can hit out with a hammer. A custom tool might be needed.
The stage 3 you drill the crank for two more key ways.
You need to get that broken keyway out of the crank. Hook something behind it that you can hit out with a hammer. A custom tool might be needed.
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You don't need to pull the engine. You just need the 8 rib system from the stage 3.
The stage 3 you drill the crank for two more key ways.
You need to get that broken keyway out of the crank. Hook something behind it that you can hit out with a hammer. A custom tool might be needed.
The stage 3 you drill the crank for two more key ways.
You need to get that broken keyway out of the crank. Hook something behind it that you can hit out with a hammer. A custom tool might be needed.
So he could get a U shaped pick/tool behind it and 'pull' it out?
Is thay keyway used with the stage 3?
Why can't he leave it?
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Why the talk of the cam gear? It should be untouched?
like engineer says, you could just clean the crank up, leave the broke keyway there and install the 8 rib system since you will install two new keyways with it.
like engineer says, you could just clean the crank up, leave the broke keyway there and install the 8 rib system since you will install two new keyways with it.
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2008 Mercedes C63
My main concern is if my crankshaft will be okay from the evosport pulley spinning on it prior to falling off. I have a OEM pulley that's on the way and should arrive Friday. I'm going to pull out the fan and radiator support to see what kind of room I have to work with before pulling the motor. Hopefully the OEM crank pulley will sit on the snout well enough to not create any wobble.
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C63 AMG
I think he was refering to the timing gear.
My main concern is if my crankshaft will be okay from the evosport pulley spinning on it prior to falling off. I have a OEM pulley that's on the way and should arrive Friday. I'm going to pull out the fan and radiator support to see what kind of room I have to work with before pulling the motor. Hopefully the OEM crank pulley will sit on the snout well enough to not create any wobble.
My main concern is if my crankshaft will be okay from the evosport pulley spinning on it prior to falling off. I have a OEM pulley that's on the way and should arrive Friday. I'm going to pull out the fan and radiator support to see what kind of room I have to work with before pulling the motor. Hopefully the OEM crank pulley will sit on the snout well enough to not create any wobble.
if you use the oem pulley you have to use the key, so the broken one must be removed
it prevents the pulley from spinning
the 8 rib pulley?
how is it secured?
do you drill 2 'dimples' and use set screws????
????
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2008 Mercedes C63
yes, the timing gear, I called it the cam (drive) gear since it spins the cams
if you use the oem pulley you have to use the key, so the broken one must be removed
it prevents the pulley from spinning
the 8 rib pulley?
how is it secured?
do you drill 2 'dimples' and use set screws????
????
if you use the oem pulley you have to use the key, so the broken one must be removed
it prevents the pulley from spinning
the 8 rib pulley?
how is it secured?
do you drill 2 'dimples' and use set screws????
????
