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TORQUE LIMITS
Unless otherwise specified in the individual installation procedures, all tightening operations should be performed with sufficient wrench torque (force on the wrench handle) to tighten a unit according to good mechanical practice. Use a torque indicating wrench where specified. Do not overtighten: this may strip the threads causing distortion. Tightening will always be understood to include the correct installation of lock washers, locknuts, lockwire, or cotter pins to secure the tightened nut. Consider the alternative, cracked engine blocks, warped cylinder heads, distorted leaking oil pans, broken bolts and studs and a whole lot of other problems. Recommended torque specifications are listed throughout the Jeep service manuals and military Jeep publications.
FASTENER QUALITY
So you just spent a couple a thousand dollars rebuilding that old four-banger, why not finish it off by replacing all of the attaching hardware? Doesn't that hardware store downtown have shelves of every bolt, stud, nut and washer that anyone could ever need? Better think twice about that plan. A long time ago even before the first Willys Jeep rolled off the assembly line, a group of guys known as the Society of Automotive Engineers (SAE) established standards to ensure the quality on everything in the transportation industries to include bolts, studs, nuts, washers, oil and a lot more. You will soon find out that the "no grade" or "low grade" bolts you just bought twist in half like a wet noodle as soon as you apply a little elbow grease to them, and of course they broke off flush with the engine block. This could have been easily prevented if you had spent a little more dough and bought some quality SAE grade 8 bolts and used a proper torque wrench to install them. As they say "Live and Learn". |
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