Ls Connecting Rod Torque Specs

Tighten connecting rod bolts torque fasteners note.

Ls connecting rod torque specs.

Special thanks to crackeregg for making these documents available in a digital format saved me a lot of typing. Connecting bearing cap to connecting rod retaining bolt l98 ls3 l76 l77 first pass 20y 15lbft second pass 85degrees coolant air bleed pipe and hole cover to cylinder head retaining bolt 12y 106lbin coolant temperature sensor 20y 15lbft crankshaft balancer to crankshaft retaining bolt first pass 150y 110lbft. If using aftermarket rods or bolts follow the tightening procedure specified by the manufacturer and read utilizing fastener stretch below for more information. Ls main cap and connecting rod bolts are not torque to yield tty but do use the torque angle ta specification.

All specs are taken from helms gm documentation for a 2000 model f body. The spec is similar to tty but the bolts are reusable. My tests show inconsistent torque figure. If you lost the connecting rod instruction sheet below are the proper torque specs for our rod bolts.

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. After weeks of research concerning the accuracy of the final clamp force when using a tta method with used bolts. A wise alternative for high output engines is a set of arp rod bolts and main studs that use traditional torque specs.

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.