Inboard Bolt Holes
- Ensure the fixture plate is installed during the machining and installation processes of the insert.
- The use of a cutting type fluid, WD 40® or equivalent is recommended when performing the drilling, counterboring and tapping procedures. Refer to Adhesives, Fluids, Lubricants, and Sealers
for recommended cutting fluid.
When installed to the proper depth, the flange of the insert will be seated against the counterbore of the drilled/tapped hole.
- Position the fixture plate (3) with the bushing (1) installed over the crankshaft main cap bolt hole to be repaired.
- Loosely install the fixture plate bolts (2) into the remaining crankshaft main cap bolt holes.
- Position the alignment pin (1) through the bushing and into the crankshaft main cap bolt hole.
- With the alignment pin in the desired crankshaft main cap bolt hole, tighten the fixture retaining bolts (2).
- Remove the alignment pin (1) from the crankshaft main cap bolt hole.
- During the drilling process, it is necessary to repeatedly remove the drill and clean chips from the hole and the flutes of the drill.
- Drill the crankshaft main bolt hole until the mark (1) on the drill aligns with the top of the drill bushing (2).
- Drill out the threads of the damaged hole.
- Using compressed air, clean out any chips.
- Do not remove the fixture plate, ensure the fixture plate is installed during the machining and installation processes of the insert.
- During the tapping process, it is necessary to repeatedly remove the tap and clean chips from the hole and the flutes of the tap.
- Ensure the tap has created full threads at least to the depth equal to the insert length.
- Using a suitable tapping wrench, tap the threads of the drilled hole by hand only.
- In order to tap the new threads for the insert to the proper depth, rotate the tap into the crankshaft main cap bolt hole until the mark (3) on the tap aligns with the top of the drill bushing (2).
- Using compressed air, clean out any chips.
- Spray cleaner into the tapped hole. Refer to Adhesives, Fluids, Lubricants, and Sealers for recommended cleaner.
- Using compressed air, clean out any chips.
- Do not remove the fixture plate, ensure the fixture plate is installed during the installation process of the insert.
- Do not allow oil or other foreign material to contact the outside diameter (OD) of the insert.
- Lubricate the threads of the driver installation tool (2) with the EN 42385-110 (1).
- Install the insert (2) onto the driver installation tool (1).
- Apply threadlock sealant, EN 42385-109, LOCTITE 277®, or equivalent (1) to the insert OD threads (2). Refer to Adhesives, Fluids, Lubricants, and Sealers for recommended sealant.
- Install the insert and installation driver into the tapped hole by hand only.
- Start the insert into the threaded hole.
- Install the insert until the flange of the insert contacts the counterbored surface.
- Continue to rotate the driver installation tool through the insert.
- Rotate the driver installation tool until the mark (3) on the driver installation tool aligns with the top of the drill bushing (2).
- Inspect the insert for proper installation into the tapped hole.
- Remove the fixture plate bolts (2).
- Remove the fixture plate (3) and bushing (1).
Refer to Safety Glasses Warning .
All chips must be removed from the drilled hole prior to tapping.
All chips must be removed from the tapped hole prior to insert installation.
All chips must be removed from the tapped hole prior to insert installation.
If the insert will not thread down until the flange contacts the counterbored surface remove the insert immediately with a screw extracting tool and inspect the tapped hole for any remaining chips and/or improper tapping.
The driver installation tool will tighten up before screwing completely through the insert. This is acceptable. The threads at the bottom of the insert are being formed and the insert is mechanically locking the insert into the base material threads.