pug Posted February 6, 2011 Share Posted February 6, 2011 Has anybody else had bad luck with the banks torque tube. This is going to be my 3rd one. Motor mounts transmission mounts all exsauste hangers are good. Keeps cracking in the same place. thanks Link to comment Share on other sites More sharing options...
Jeepman Posted February 7, 2011 Share Posted February 7, 2011 What Grade of Fuel are you running and what Other Performance Upgrades are you running? I ask Because I had a Rugged Ridge Header crack on me and After some diagnosis I found out my Manifold was Getting Too hot with 87 Octane fuel... A little info on my Truck... - Header - High Flow Intake (99+ intake) - Cold Air intake - Complete 2.5" Exhaust system with High flow Cat - 60MM TB - Larger injectors - Dual Electric Fans in place of the Mechanical/electrical - Jet Performance Chip (91 Octane MIN) Aprox 260HP @ crank, Now when I run 87 Octane fuel my Header gets red hot if I rev to 2000RPM therefore the manifold is susceptible to cracking as it becomes more vulnerable… I experimented a little and with some 89 octane but always with 91 Octane I no longer have a Red hot manifold @ 2000RPM... The thing is when your at Wide open throttle the 4.0L engines tend to run lean which will make the exhaust Manifolds/headers get cherry red so if you have cracked a few Try upgrading your Octane and see how long the next one lasts I would bet that it will last a lot longer if not indefinitely… Link to comment Share on other sites More sharing options...
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