Engines and Components Engines, Blocks and Components

ATK ENGINES

CHEV 4.3/262 00-01 ENGINE

$2,127.23

SKU: A040 DMW3

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Professional / shop required

Description

The ATK Engines DMW3 is a remanufactured marine long block replacement for GM 4.3L (262ci) V6 engines. This unit is designed as a direct replacement for standard rotation marine powerplants.

This long block includes the block, crankshaft, connecting rods, pistons, camshaft, lifters, cylinder heads, and valvetrain. It does not include external marinization components, which must be transferred from the existing engine.

Customers must verify their vessel's specific GM 4.3L generation, including whether the engine requires a balance shaft or non-balance shaft configuration, as well as checking if the application requires standard or counter-rotation.

ATK engines are remanufactured to high standards, providing a reliable power solution for marine applications. Proper installation requires swapping necessary ancillaries and ensuring all cooling and exhaust systems are correctly adapted to the new long block.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandATK ENGINES
Part NumberA040 DMW3

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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