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Hand Rod
Most people in the high-performance automotive, motorcycle, and marine industry consider CARRILLO connecting rods to be the best available today. The CARRILLO connecting rod is a precision, high-strength, quality connecting rod, and when properly installed and maintained, will perform faultlessly in today's racing and high-performance internal combustion engines.

To assist you in the application of our product we would like to offer some suggestions and specifications that should prove helpful.

BOLTS
All bolts should be lubricated under the heads as well as on the threads. We recommend the bolt lube supplied with the rods, or as an alternative, a molybdenum base paste mixed with engine oil.

The preferred method to torque the bolt is by using the stretch figure listed in the table below. In order to check bolt stretch, simply fixture one rod, leaving the cap portion free from clamping load. Measure both bolt lengths loose, then progressively tighten the bolt until the measured increase in length correlates with the figures below. Use your indicated torque reading to tighten all the connecting rods in final assembly.

TYPE OF BOLT
THREAD SIZE		 STRETCH
RECOMMENED		 TORQUE
NOT TO EXCEED
1/4 SPS-CARR .004 to .006 275 Inch Pounds
5/16 SPS-WMC5 .004 to .006 38 Foot Pounds
5/16 SPS-CARR .005 to .007 45 Foot Pounds
3/8 SPS-WMC6 .005 to .007 45 Foot Pounds
3/8 SPS-CARR .005 to .007 65 Foot Pounds
7/16 SPS-CARR .005 to .008 100 Foot Pounds
7/16 SPS-WMC7 .005 to .007 75 Foot Pounds
7/16 SPS-WMC7-1 .005 to .007 75 Foot Pounds
DO NOT MAGNAFLUX CARRILLO CONNECTING RODS WITH BOLTS INSTALLED.

CLEARANCES
Bearing clearances are dictated primarily by the bearing, not by the housing bore of the connecting rods. The connecting rod bore determines crush. Bearing clearances vary as to the application, diameter of the journal and bearing design. An approximate factor would be .001" per 1.000" diameter of crankshaft pin measured at the crown of the bearing surface. Wrist pin to bushing clearance is variable per diameter as well.

The following is a reference scale:

WRIST PIN DIAMETER CLEARANCE MAXIMUM CLEARANCE
.500 TO 0.750" .0010" .0016"
.751 TO 1.094" .0012" .0020"
PRIOR TO DISASSEMBLY OF THE CONNECTING RODS, NUMBER THE CONNECTING ROD AND MATCHING CAP. DO NOT USE METAL STAMP!



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