How do you Torque a Harley Davidson head bolt?
Harley’s head-bolt torque method harkens back to a time when torque specifications were less scientific. Minton explains that the procedure requires the use of a torque wrench but not for final tightening. First, you should pre-load the bolts to about 16 foot-pounds. Then, with a pencil, make a witness mark on both the cylinder head and head bolt.
How much torque does a cylinder head have?
Mark each head bolt and head with aligning marks. Tighten each bolt 1/4 turn (90 degrees). For each cylinder head, start with head bolt numbered one. In increasing number sequence (1-2-3-4), tighten the head bolt in four stages. 1. Tighten each bolt to 7-9 foot pounds of torque. 2. Tighten each bolt to 12-15 foot pounds of torque.
What’s the correct torque for a Sportster bolt?
First, you should pre-load the bolts to about 16 foot-pounds. Then, with a pencil, make a witness mark on both the cylinder head and head bolt. Then turn the head bolt an extra quarter-turn to achieve the correct torque.
What kind of torque do I need for a hex cap?
Torque for Flanged Hex Head and Tapered Socket Cap Bolts – use torque values specified by your equipment manufacturer. Torque for Dome Head and Countersunk Bolts – use the following torque guide.
Harley’s head-bolt torque method harkens back to a time when torque specifications were less scientific. Minton explains that the procedure requires the use of a torque wrench but not for final tightening. First, you should pre-load the bolts to about 16 foot-pounds. Then, with a pencil, make a witness mark on both the cylinder head and head bolt.
Mark each head bolt and head with aligning marks. Tighten each bolt 1/4 turn (90 degrees). For each cylinder head, start with head bolt numbered one. In increasing number sequence (1-2-3-4), tighten the head bolt in four stages. 1. Tighten each bolt to 7-9 foot pounds of torque. 2. Tighten each bolt to 12-15 foot pounds of torque.
What is the correct torque for a SAE J429 bolt?
SAE J429 governs imperial sizes, while ISO 898 governs metric-size bolts. 1/4 to 3/4in. >3/4 to 1 1/2in. For imperial bolts, grades 5 and 8 are most common. SAE J429 conforming bolts will have radial markings machined on the head of the bolt that indicate bolt grade.
What are the torque values on a Harley Davidson?
Technical information on fastener torque values used in the maintenance, repair or assembly of Harley-Davidson motorcycles. If you are unsure of the proper torque value to use, here is a general chart of fastener torque values. This table is based upon Grade 5 fasteners, generally used Harley-Davidson motorcycles.