Shims Crankshaft bearings LS3 engine model.

Shims to center the crankshaft bearings in the LS3 engine model.

These parts are designed for the working LS3 engine model:
https://makerworld.com/en/models/412003-chevy-camaro-ls3-v8-engine-scale-working-model#profileId-313926

Original engine model created by “Ericthepoolboy” on Thingiverse:
https://www.thingiverse.com/thing:1911808

The 6701ZZ bearings used between the crankshaft and piston rods can slide sideways, which can make the piston rods clamp slightly off-center on the crankshaft.

To solve this I designed simple shims that center the bearings and keep the rods aligned during assembly.

This file also includes printed “6701ZZ & 6702ZZ” bushings that can be used as temporary or alternative bearings.

Plate 1 – Crankshaft Bearing Shims

16 × shims designed to center the 6701ZZ crankshaft bearings when installing the piston rods.

Specifications:

• Thickness: 2.4 mm
• Outer diameter: 17 mm
• Inner diameter: 12 mm

These help keep the bearings aligned so the piston rods clamp straight onto the crankshaft bearings.

They work with:

• real 6701ZZ bearings
• the included printed bushings

Printed here in copper color.

Plate 2 – Crankshaft Bushings (Temporary Bearings)

13 × printed bushings with approximately the same size as 6701ZZ bearings.

These are useful if:

• you want to assemble the engine before your real bearings arrive
• you want to test-fit the crankshaft and rods
• you prefer a simple sliding bearing instead of ball bearings

The inner diameter is slightly larger so the crankshaft can rotate freely.
They act as simple bushings / sliding bearings, not ball bearings.

Printed here in blue.

Plate 3 – Camshaft Bushings

5 × printed bushings sized to replace 6702ZZ camshaft bearings.

These allow you to:

• assemble the camshaft before the real bearings arrive
• test the engine mechanism
• use a cheaper sliding bearing alternative if desired

Printed here in red.

Print Notes

All parts are small and quick to print.

Approximate material usage:

• Shims: ~5.5 g – ~29 min
• Crankshaft bushings: ~8.8 g – ~42 min
• Camshaft bushings: ~4.1 g – ~23 min

No special print settings required.

If you have suggestions for improvements or additional sizes, feel free to leave feedback. 

Happy printing! 💅✨