Exhaust Stud Nut Re-use?

exhaust nut re-use stud
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Exhaust Stud Nut Re-use?

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[Tip from Bob] Do not re-use exhaust manifold nuts; use new Volvo flanged copper nuts. Reuse the original concave Volvo steel washers under the nuts: the concave side faces the head. Replace all three exhaust manifold-to-down pipe lock-nuts when replacing the gaskets. These nuts are not to be re-used [Jim McDonald] Use P/N 94560A080 from McMaster-Carr instead; they’re stainless so they won’t sieze, and they’re locking so they won’t loosen. If you use aftermarket nuts, they may not be flanged: a copper washer will help secure the nut and stud. [Cameron Daline] ATP Turbo sells a copper nut that works well for only about $1 each. Removing the Manifold and Replacing the Gaskets. [Tips from Turbobricks, John Sargent, and others] Place the front of the car on jackstands or ramps: you will need good access to the underside. Remove all the manifold nuts and loosen the down pipe nuts OR loosen the down pipe fixing bolts at the bell housing and transmission, depending on your car.These will be r