Ls Connecting Rod Torque Specs

A wise alternative for high output engines is a set of arp rod bolts and main studs that use traditional torque specs.

Ls connecting rod torque specs.

My tests show inconsistent torque figure. The spec is similar to tty but the bolts are reusable. Special thanks to crackeregg for making these documents available in a digital format saved me a lot of typing. All specs are taken from helms gm documentation for a 2000 model f body.

For example most ls small blocks that have a 3 622 inch stroke use a 6 098 inch connecting rod and this equates to a rod to stroke ratio of 1 68 1. Connecting rod bolts first pass 20y 15lbft connecting rod bolts final pass 85degrees coolant temperature gauge sensor 20y 15lbft crankshaft balancer bolt installation pass to ensure. Ls main cap and connecting rod bolts are not torque to yield tty but do use the torque angle ta specification. If using aftermarket rods or bolts follow the tightening procedure specified by the manufacturer and read utilizing fastener stretch below for more information.

Fastener specifications fastener tightening specifications application specification metric english. Connecting rod side clearance 0 11 0 51 mm 0 00433 0 02 in crankshaft connecting rod journal diameter production 53 318 53 338 mm 2 0991 2 0999 in connecting rod journal diameter service 53 308 mm 2 0987 in connecting rod journal out of round production 0 005 mm 0 0002 in connecting rod journal out of round service 0 01. Tighten connecting rod bolts torque fasteners note. From a mathematical standpoint a couple thousandths of an inch of rod length doesn t impact the ratio much at all.

The procedures described in this step apply to engines using gm connecting rods and rod bolts only.