Crank Balancer snapped off (Whipple 2.9)

[velocity550]

Once you snap snout timing chain sprocket comes with it, need I say more?

OOOOOOO yeah thats no good :(

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[LSchicago]

ATI strikes again!

 

[80FoxCoupe]

ATI strikes again!

Too many variables to determine that the root cause stems from ATI balancers.

 

[olaosunt]

Shouldn't happen with a turbo setup as there is no external pressure/force on the crank.

As far as a long block, good luck. Unfortunately, they seem to be difficult to find and even more difficult to get accurate delivery timing.

It happens to turbo as well.

Yes sir . Happened to me .

 

[olaosunt]

So I have a 2015 Mustang Gt with 30k miles, with a Whipple gen2 2.9 on a 10 rib kit with Ati balancer with arp bolt. I used red loctite on the bolt and only used a torque wrench to seat it and torque it to 120ft/lbs. I even checked it recently and the balancer was still fully seat and torqued to 120ft/lbs. So the 25th I went wot throttle and at 7600rpm the crank snout broke. Engine shut down by itself and it was quite a noise it made.
Wondering to how many has this happen with forced induction?

Would this happen to a turbo setup?
And where can I get a gen2 longblock? They’re out of stock

Well hit me up .... might have a spare

 

[Kobi Addiction]

I'd recommend a crank support for some peace of mind

https://www.lethalperformance.com/m...0-mustang-gt-with-whipple-g5-10-rib-kits.html

 

[LSchicago]

Too many variables to determine that the root cause stems from ATI balancers.

The one constant variable is that 90% of the time, it is an ATI.

 

[olaosunt]

It happens to turbo as well.

Last motor I broke .

https://www.mustang6g.com/forums/th...ith-“predator”-5-2-gt-350-heads.52488/page-16

 

[80FoxCoupe]

The one constant variable is that 90% of the time, it is an ATI.

There variables that are present 100% of the time, such as the stock crank. But then there are variables that play a big role that are not being taken into account such as max RPM, was limiter hit, was balancer installed correctly etc. It may simply be that folks with an aftermarket balancer run thier stuff harder. But without a proper RCA, its all an assumption.

 

[LSchicago]

There variables that are present 100% of the time, such as the stock crank. But then there are variables that play a big role that are not being taken into account such as max RPM, was limiter hit, was balancer installed correctly etc. It may simply be that folks with an aftermarket balancer run thier stuff harder. But without a proper RCA, its all an assumption.

It is said most of the time that it was improper installation.

 

[Jackson1320]

This sucks and I hope op is able to get it fixed soon but I’m willing to bet that the limiter was hit a few times.

 

[Jackson1320]

A new crankshaft some bearings and a set of valves in the hands of someone who knows what they are doing should just about fix it. Could be fixed as low as $1000-$1500 if he can pull the engine himself. If not add another $500-$1000

 

[80FoxCoupe]

It is said most of the time that it was improper installation.

The fit is tight, and often the balancer bolt torque can be achieved without the balancer seating completely.

 

[LSchicago]

The fit is tight, and often the balancer bolt torque can be achieved without the balancer seating completely.

This is what I have heard before too.

 

[Epiphany]

I used red loctite on the bolt and only used a torque wrench to seat it and torque it to 120ft/lbs. I even checked it recently and the balancer was still fully seat and torqued to 120ft/lbs.

How did you "check" the installed torque figure with fully cured red loctite on an installed fastener?

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