GM 3990918 Engine Mount Instruction Sheet – 1967-69 Chevelle Camaro Chevy II
Engine mounting installation instruction sheet with a model/year/engine table and assembly figures.
This document is a General Motors Engine Mounting Instruction Sheet for part number 3990918, an engine mounting unit usable on either the left or right hand side. The sheet states the unit replaces the engine mounting assembly on specific Chevrolet models: full-size Chevrolet 1967-1968 without power steering (327 engine) and 1967-1969 (350-396-427 engines), Chevelle 1968-1969 (327-350-396), Chevy II 1969 (350-396), and Camaro 1969 (302-350-396). An important installation note advises that when installing the mount as a right-hand replacement, the installer must check battery cable and automatic transmission cooler line routing to provide a minimum of 1 inch of clearance to the legs of the mounting assembly, to prevent chafing during engine operation. The lower portion of the scan shows partial installation diagrams with callouts for the MOUNTING ASM, a FWD (forward) direction arrow, ENG MOUNT LEG, CYL CASE, and a 1" clearance dimension (cut off at the bottom of the image). A reader can learn which classic Chevrolet models, years, and engine displacements this mount fits, and the clearance precaution required during installation.
This document covers 1967-1969, which may differ from this 2015 Chevrolet new.
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Frequently asked questions
- What vehicles does the 3990918 engine mounting unit fit?
- Per the sheet: Chevrolet 1967-1968 without power steering (327) and 1967-1969 (350-396-427), Chevelle 1968-1969 (327-350-396), Chevy II 1969 (350-396), and Camaro 1969 (302-350-396).
- Can the 3990918 mount be used on either side of the engine?
- Yes, the sheet describes it as a 'Mounting Unit Engine—Left or Right Hand.'
- What precaution is required when installing this mount on the right-hand side?
- Check battery cable and automatic transmission cooler line routing to provide a minimum of 1 inch clearance to the legs of the mounting assembly to prevent chafing during engine operation.
- Which engines does this mount fit on a 1969 Camaro?
- 302, 350, and 396 engines, according to the applicability table.
- Does the sheet include installation diagrams?
- Yes, the visible portion shows diagrams with callouts for MOUNTING ASM, FWD direction, ENG MOUNT LEG, CYL CASE, and a 1" clearance dimension.
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