Isx Exhaust Manifold Bolt Torque

  1. Cummins Isx Exhaust Manifold Bolt Torque Spec

If its a four cylinder(lets hope)the specs are 80-90ft.lbs torque.if its a six cylinder it is 14ft.lbs torqueat 90 degree intervals then repeat until correct torque has been reached.bad news is you can not use the same bolts on the six cylinder engine.have to be new to keep from breaking them Posted on. Keep your manifold secure with a brand new Cummins bolt made with long lasting strength and durability. You'll get quality because each bolt is manufactured and assembled in an ISO 9001: 2008 certified facility. Our bolts are made to OE specifications and you'll get equal or better quality compared to the OE at a much lower price. Contents (1) Bolt. Torque the exhaust manifold bolts to the specifications listed in the owner's manual. Test drive the vehicle and check to see that the initial issue has been remedied by listening and visually inspecting for exhaust leaks at the manifold gasket. AutoMedia.com: Exhaust Manifold. ISX15 and ISX Model Pages 2-3 4-5 - Cummins Cummins Isx 15 Exhaust Manifold Bolt Torque Specs. The standard is to use 20 to 30 foot-pounds of torque. Older engines often fall on the lighter side of the equation, so use 15 to 20 foot-pounds of torque if your engine is 15 years old or older.

Chevy exhaust manifold torque sequence

Cummins Isx Exhaust Manifold Bolt Torque Spec

So one of these decided to let go today. I just had the whole thing apart recently. They were torqued with a torque wrench to 75 ft/lbs.
One thing I dont recall when I put the turbo back on was if they were torque to yield bolts. I wouldn't think so, but I could be wrong.
At least it happened unloaded 30 miles out, unloaded, and I was able to keep feather pedaling it home but boy did it not run well under any boost, understandably. Mileage dropped a good bit too. At least it waited until I got out of the mountains... I'll end up replacing all 4 and the gasket for good measure. Is there a service life or anything I need to be aware of, torque to yield, or maybe it was just a bad stud?