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GM Engine Pre-Lube Adapter – 3/8" NPT | Motive Products #1138

Protect a fresh GM build from “dry start” damage with the Motive Products GM Pre-Lube Adapter (3/8" NPT). Thread this precision fitting into the factory oil-pressure sender port, snap on your Motive PowerFill™ or Power Bleeder hose, and pressurize the oil galleries before that first key-turn. A few pumps delivers clean oil to bearings, lifters, and cams—no cranking required.

Key Features & Benefits

Feature Benefit
3/8" NPT male thread Direct fit for most small-block, big-block, and LS-series GM engines that use a 3/8" NPT pressure-sender port.
Quick-connect brass coupler Attaches in seconds to any Motive PowerFill/Power Bleeder tank; swiveling design prevents hose twist.
Anodized aluminum body Lightweight, corrosion-resistant, and safe for all engine oils.
One-person operation Pressurize to 20–30 psi and watch fresh oil flow—no helper, no mess, no dry friction.
Reusable shop tool Ideal for engine builders, machine shops, fleet garages, and DIY enthusiasts rebuilding classic Chevy or modern LS powerplants.

Whether you’re firing up a crate 350, a rebuilt 454, or a high-revving LS3, this GM pre-lube adapter gives your new bearings the oil cushion they need for a safe, worry-free first start.

Fits 3/8" NPT sender ports—verify thread size on non-GM or aftermarket blocks before ordering.

WARNING: Reproductive Harm - www.P65Warnings.ca.gov