Broken crankshaft

[TRP45ACP]

Good news! Where did you order your crank support and balancer from? Did you go IW or ATI?

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[TGGT]

Good news! Where did you order your crank support and balancer from? Did you go IW or ATI?

I ordered the crank support and pulley directly from procharger. And I purchased the ati balancer from summit

 

[80FoxCoupe]

Got it !
So what would happen if you used the 5.2 crank with a coyote rod /piston combo (with 1.165 CH ) ?

I know if you did the “reverse” with boss crank and voodoo piston in a 5.2 block you lose displacement /CR and quench .

5.2 crank and coyote rod/piston would put the piston out of the hole approx .010 if block deck was zero.

Yes, coyote crank with voodoo rod/piston would put piston in the hole .010 if block deck was zero.

 

[Jackson1320]

Supply and demand sir

Possible. But the gen1 and gen2 were similarly priced but the gen3 a lot cheaper

 

[K4fxd]

But the gen1 and gen2 were similarly priced but the gen3 a lot cheaper

It's because the gen 3 is currently in production.

5.2 crank and coyote rod/piston would put the piston out of the hole approx .010

So not a big deal, either mill .01 off the top or just run it with an .04 gasket.

 

[bauern]

5.2 crank and coyote rod/piston would put the piston out of the hole approx .010 if block deck was zero.

Yes, coyote crank with voodoo rod/piston would put piston in the hole .010 if block deck was zero.

This is a little confusing. What do you mean by "block deck was zero"? (Zero deck height means that the top of the piston (flat portion of top regardless of dish or crown) is even with the top of the block.)

Nominally, the piston for the coyote and voodoo engines are 0.011 - 0.012 down respectively. Using the 5.2 crank w/coyote pistons puts the piston 0.005 down.

 

[80FoxCoupe]

It's because the gen 3 is currently in production.

So not a big deal, either mill .01 off the top or just run it with an .04 gasket.

Or just run the correct components.

 

[K4fxd]

Or just run the correct components.

I'm an old school hot rodder.

 

[80FoxCoupe]

This is a little confusing. What do you mean by "block deck was zero"? (Zero deck height means that the top of the piston (flat portion of top regardless of dish or crown) is even with the top of the block.)

Nominally, the piston for the coyote and voodoo engines are 0.011 - 0.012 down respectively. Using the 5.2 crank w/coyote pistons puts the piston 0.005 down.

Ill go with it

 

[WildHorse]

Using the 5.2 crank w/coyote pistons puts the piston 0.005 down.

Now you need to check for piston to valve clearance. Old skool kool.

 

[olaosunt]

This is a little confusing. What do you mean by "block deck was zero"? (Zero deck height means that the top of the piston (flat portion of top regardless of dish or crown) is even with the top of the block.)

Nominally, the piston for the coyote and voodoo engines are 0.011 - 0.012 down respectively. Using the 5.2 crank w/coyote pistons puts the piston 0.005 down.

So effectively increasing compression ?

 

[K4fxd]

So effectively increasing compression ?

Unless you add .01 to the gasket

 

[TGGT]

The damage is worse than I thought. I got the motor out today and pulled one of the valve covers to find every rocker arm broken. I’m thinking I may have to get a long block now.

 

[olaosunt]

The damage is worse than I thought. I got the motor out today and pulled one of the valve covers to find every rocker arm broken. I’m thinking I may have to get a long block now.

Sorry man .
Been there twice .
first time was my 2012 GT with 2.9 whipple and 20 % OD ATI damper . Heads were trashed .
More recently one of my 15’s -Hellion TT with stock size ATI damper . Expensive GT 350 heads too . Multiple broken rockers and cam caps/bent valves .
MMR could fix them but by the time I shipped /bought new valves decided not worth it .

used GT 350 heads as core for new GT heads .
$850 OTD

Good luck on the rebuild .

 

[SolarFlare]

Sorry to hear T, sounds like that ^head exchange is your best bet.

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