Description

Overview

Aeroflow Starter Shim Kit GM Small & Big Block helps you correctly set pinion-to-ring gear engagement on GM in-line bolt starter motors. The kit provides stepped steel shims and matching fasteners so you can dial in the offset, reduce grind or kickback, and achieve smooth cranking performance on trailer tow vehicles and service rigs that use GM-based powertrains.

Features

• Shim and bolt kit for GM in-line bolt starter motors
• Multiple shim thicknesses to fine-tune starter alignment
• Quality steel plates with matching fasteners
• Suited to small block and big block Chev applications

Specifications and Materials

The kit includes several slotted steel shims sized for GM-style starters and replacement bolts with washers to secure the assembly after adjustment. Shims are corrosion-resistant coated steel suitable for under-bonnet temperatures when installed away from exhaust contact. For part identification and contents, refer to the manufacturer product page

Compatibility and Fitment

Intended for GM small block and big block Chev engines using in-line bolt starters. Fit shims between the starter and mounting surface to correct gear mesh. Start with the smallest stack, check clearance with a feeler gauge, and increase as required. Re-torque fasteners and recheck after the first few starts.

Compliance and Safety

Disconnect the battery before any starter work. Keep cable runs clear of moving components and heat sources. After installation, verify the pinion engages cleanly without binding and that there is no contact with the ring gear when the engine is running.

Trailer Applications

Useful for service trailers and support vehicles running GM-based engines where repeated start cycles demand reliable engagement. Correct shimming helps minimise wear on the ring gear and starter pinion, lowering maintenance costs over time.

Why Choose ICS Trailers

We source proven parts and present clear fitment guidance so your electrical system stays dependable. For more charging, cabling and mounting hardware, browse Electrical parts at ICS Trailers