INSTALLATION INSTRUCTIONS FOR ALUMINIUM CONNECTING RODS

1. Correct Clearances
   1. Use plastigage or micrometers to obtain a minimum of .0025″ bearing clearance.
   2. Side clearance for each pair of rods should be .020″ -.060″ for rods sharing a journal.
   3. Side clearance for single rod per rod journal should be between .012″-.035″
   4. Minimum clearance for wrist pins should be .0007″
2. Lubricants and Torquing
   1. Clean, and check rods well for debris. Apply 50W oil to threads, and under head of bolt, then stretch per table A below. Do not use anti seize, or moly lube. Measure the rod bolt loose, then progressively tighten to the appropriate stretch recommended, not to exceed the torque figures below.

(Table A)

1. TYPE OF BOLT	RECOMMENDED STRETCH	TORQUE DO NOT EXCEED
   1/4” BLACK OXIDE	No stretch figures	150 INCH POUNDS
   5/16” ARP 2000	.0057-.0061”	33 FOOT POUNDS
   5/16” CUSTOM AGE	.0062-.0066”	42 FOOT POUNDS
   3/8” ARP2000	.0055-.006”	65 FOOT POUNDS
   3/8” L19	.0065-.007”	75 FOOT POUNDS
   7/16” 8740	.005-.0055”	75 FOOT POUNDS
   7/16” ARP2000	.0055-.006”	80 FOOT POUNDS
   7/16” L19	.0062-.0068”	90 FOOT POUNDS
   7/16” Custom Age 12mm L19 Hybrid	.0062-.0068” .0072-.0077″	90 FOOT POUNDS 125 FOOT PUNDS

 

1. Rotating Clearances
   1. A minimum of .060-.080″ should be kept between all obstacles such as cam, pan rails, etc. (only cut on rods as a last resort—this is highly not recommended)
2. Maintenance
   1. Never re-torque rods when they are hot. Do not replace rod bolts in a used rod.
   2. Heavy chamfer side of rod always goes towards cheek side of the crankshaft.
   3. Chamfered I.D. of washers must go toward head of rod bolts.
   4. Check serrations for burrs. If necessary, repair with small jewelers file.

INSTALLATION INSTRUCTIONS FOR STEEL CONNECTING RODS

1. Correct Clearances
   1. Approximate bearing clearance is .001″ per inch of rod journal diameter unless otherwise specified by original equipment manufacturer.
2. Lubricants and Torquing
   1. For all rod bolts, both under head and threads should be lubricated with included ARP moly assembly lube (steel rods only)
   2. The preferred torquing method is to measure rod bolt stretch, as shown in Table B below. Measure the rod bolt length loose, then progressively tighten to the appropriate stretch recommended, not to exceed the torque figures below.

(Table B)

TYPE OF BOLT	RECOMMENDED STRETCH	TORQUE DO NOT EXCEED
1/4″ CUSTOM AGE	.004-.006″	275 INCH POUNDS
5/16″ ARP 2000	.0057-.0061″	28 FOOT POUNDS
5/16″ CUSTOM AGE	.0062-.0066″	32 FOOT POUNDS
3/8″ ARP 2000	.0055-.006″	47 FOOT POUNDS
3/8″ L19	.0065-.0070″	65 FOOT POUNDS
3/8″ CUSTOM AGE	.006-.0064″	55 FOOT POUNDS
7/16″ ARP 2000	.0055-.006″	75 FOOT POUNDS
7/16″ CUSTOM AGE	.006-.0065″	88 FOOT POUNDS
1/2″ L19	.0083-.0087″	130 FOOT POUNDS

1. Additional notes
   1. Pin fit may be required. < 0.750″ diameter require .0010″-.0016″ clearance ; 0.751-1.100″ require .0012″-.0020″ clearance. Larger pins require more clearance.
   2. Rotating assembly should be blueprinted to ensure there are no interference issues.
   3. Use engraving or etching tool for numbering matching rods and caps, not stamps.
   4. If any rod bolts permanently stretch after installation or engine has been over-revved, rod bolts should be replaced.