Engines and Components› Engines, Blocks and Components
ATK ENGINES
CHEV 4.3/262 00-01 ENGINE
SKU: A040 DMW3
Professional / shop required
Description
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
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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
| Brand | ATK ENGINES |
| Part Number | A040 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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