Usage:
3600 Family Of Engines
- SUPPLEMENT: 08/01/97
Engine News; July 1997; Page 9; "Updated Connecting Rod Bolt Tightening Procedure"
On Page 10, in the "Updated Connecting Rod Bolt Tightening Procedure", Step 1 is NOT correct. The correct Step 1 follows:
1. Lubricate the bolt threads and the seating faces of the cap and nut with 6V-4876 Molykote Paste, do NOT lubricate the bolt shank.
--------------- END SUPPLEMENT ---------------
Determine The Reusability Of The 1W-0098 Connecting Rod Bolts And 6V-9801 Connecting Rod Nuts
The connecting rod bolts and nuts can normally be used again unless there is obvious damage or if the hardware was loose before it was removed. See the following lists for reasons to use again or not use again.
USE AGAIN
-
- Normal operation can polish the serrations on the bolt. If you can not easily feel any grooves caused by the polishing with your finger nail, use the bolt again.
- Polishing or very shallow grooves on the contact surface of the nut are acceptable, IF the contact surface is still smooth and flat.
- Normal operation can polish the serrations on the bolt. If you can not easily feel any grooves caused by the polishing with your finger nail, use the bolt again.
DO NOT USE AGAIN
-
- 1. You can feel any nicks or grooves with your finger nail in the serrated section of the bolt.
- 2. There is corrosive pitting in the shank area of the bolt.
- 3. The bolt shank is heavily damaged.
- 4. The bolt has damaged threads.
- 5. There are indentations on the bolt head from incorrect installation on the 4W-8344 Retainer.
- 6. The bolt or nut has damaged flats.
- 7. There is heavy smearing, galling, and/or fretting on the contact surface of the nut. Using the correct installation procedure and lubricant will keep fretting to a minimum.
- 8. There is rust or any other damage to the bolt or nut.
- 1. You can feel any nicks or grooves with your finger nail in the serrated section of the bolt.
A connecting rod bolt and nut should be replaced after going through the tightening procedure five times.
If there is obvious damage to a retainer, do not reuse the retainer. The bolt seat area of the connecting rod cap should be visually inspected. Do NOT use connecting rod again if there is any evidence of fretting or galling in the bolt seat area. In some cases, the bolt seat area can be machined flat, and the connecting rod can be used again. Refer to the Guideline for Reusable Parts and Salvage Operations, SEBF8063-01, for instructions to repair the bolt seat area and for more information on connecting rod reusability.
Updated Connecting Rod Bolt Tightening Procedure
Identification of connecting rod bolts.
NOTE: The No. 1 and No. 2 connecting rod bolts are on the same side of the connecting rod as the raised bosses and the connecting rod bearing tab slots.
1. Lubricate the bolt threads, shank, and seating faces of the cap and nut with 6V-4876 Lubricant.
2. Tighten nuts No. 1 and No. 2 to a torque of 300 ± 30 N·m (220 ± 22 lb ft).
3. Tighten nuts No. 3 and No. 4 to a torque of 300 ± 30 N·m (220 ± 22 lb ft).
4. Tighten nuts No. 1 and No. 2 again to a torque of 300 ± 30 N·m (220 ± 22 lb ft).
5. Tighten nuts No. 3 and No. 4 again to a torque of 300 ± 30 N·m (220 ± 22 lb ft).
6. Tighten each nut an additional 180 ± 5 degrees.
Make a note of the new connecting rod bolt tightening procedure in all 3600 Family of Engines Specification modules and Disassembly & Assembly modules.