Roush Engine Failure – Pictures

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#11 (permalink)

11-09-2010, 11:21 AM

ItBites

CC Member

Join Date: Oct 2003

Location: Queen Creek, AZ

Cobra Make, Engine: Midstates, Vette suspension, Baer 6P brakes, 540 cid Chevy, Haltech Fuel Injection

Posts: 906

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$23K??? Wow, the Roush name sure carries a premium!

This is likely the result of improper (low) torque on the nut, which allowed it to back-off and then the shaft snapped due to excessive deflection at the stress-riser (hole). In-spite of many 'experts' guidance your may recieve, including those from Roush, a properly torqued fastener will not back-off in this application. If they did, we'd never keep main caps attached to blocks or head bolts in heads. This has all the signs of improper assembly.

__________________
E. Wood
ItBites
10.69 @ 129.83mph - on pump gas and street tires

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