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Old 01-07-2019, 05:28 PM   #1
LeedomtoFreedom
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Default B234f billet crank gear necessary?

Just trying to boil this down.

If the pulley was torqued correctly, why would the locator tooth shear? Surely it's just to locate and has very little force actually applied to it. The same way that wheels don't rest on top of hubs, they're merely there to locate the wheel, and the friction and torque of the studs hold it in place?

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Old 01-07-2019, 05:39 PM   #2
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It could conceivably give you 10 - 15 seconds to hear the front pulley coming loose and shut it down before the pistons eat half the valves.

You are correct though, the cute little nubbin is NOT there to handle valvetrain torque, the pulley being clamped onto the crank snout and pinching it between with 5000 ft lbs of torque is enough to hold it.

One time I took mine off, and while the crank gear hadn't moved, the nub had somehow broken off while bolted up. So I stuck a key/billet gear on just for some false peace of mind.
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Old 01-07-2019, 07:02 PM   #3
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It could conceivably give you 10 - 15 seconds to hear the front pulley coming loose and shut it down before the pistons eat half the valves.

You are correct though, the cute little nubbin is NOT there to handle valvetrain torque, the pulley being clamped onto the crank snout and pinching it between with 5000 ft lbs of torque is enough to hold it.

One time I took mine off, and while the crank gear hadn't moved, the nub had somehow broken off while bolted up. So I stuck a key/billet gear on just for some false peace of mind.
I've had the nub break twice on my 8v. Once the pulley came loose and I heard it. And the second time, no ill effects. Discovered by chance.
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Old 01-07-2019, 07:20 PM   #4
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I've had the nub break twice on my 8v. Once the pulley came loose and I heard it. And the second time, no ill effects. Discovered by chance.
How do you usually torque the pulley bolt? by hand? That's what I do
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Old 01-07-2019, 07:47 PM   #5
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Originally Posted by LeedomtoFreedom View Post
How do you usually torque the pulley bolt? by hand? That's what I do
Count the ugga duggas.
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Old 01-07-2019, 07:54 PM   #6
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How do you usually torque the pulley bolt? by hand? That's what I do
I put the transmission in fourth gear. Grab a large breaker bar and cheater bar and put my weight into it. Probably not well enough considering it's happened twice now. The nub sticks out so little with the washers.
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Old 01-07-2019, 08:02 PM   #7
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Quote:
Grab a large breaker bar and cheater bar and put my weight into it.
How many times do you grunt when torquing..? Just so I can get it accurate.

I'll keep this in mind when I put it together
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Old 01-07-2019, 10:08 PM   #8
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I zipp em on with my air impact full power 400ft lbs... Muscles, ha..
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Old 01-08-2019, 01:57 AM   #9
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I have this Ingersoll Rand 3/4" impact. Weighs like 30lbs but if you let the dog eat, it'll rip heads clean off, ask me how I know
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