Autotecnica GM0718797 Engine Coolant Reservoir

Engine Coolant Reservoir for Astro and Safari

Replace a cracked or leaking coolant overflow tank with this Autotecnica engine coolant reservoir, part number GM0718797. It is built from HDPE plastic and includes a snap-fit cap for a direct replacement on select Chevrolet Astro and GMC Safari applications.

• Engine coolant reservoir for cooling system overflow and expansion
• HDPE plastic construction
• Snap-fit cap included
• Non-pressurized design
• Single mounting hole configuration
• Dimensions: 130 length, 420 height, 158 mm width

Detailed Product Information

Autotecnica GM0718797 is an aftermarket coolant reservoir made to replace the original expansion tank on 1985-1994 Chevrolet Astro and 1985-1994 GMC Safari models. This reservoir helps maintain proper coolant level management in the cooling system by providing a dedicated container for expansion and return flow as the engine heats and cools. The part number GM0718797 also cross-references 15594487 for the same application.

Built from plastic (HDPE), this reservoir is a practical OE-style replacement for vehicles that need a new coolant overflow tank due to age, cracking, or discoloration. It is non-pressurized and uses a snap-fit cap design, with the cap included. Autotecnica manufactures replacement parts to ISO/TS 16949 QMS specifications for consistent fit and production control.

Common Problems This Part Can Address

• Coolant loss from a cracked or split reservoir
• Overflow tank leaks at the seam or mounting area
• Broken or missing reservoir cap
• Low coolant level caused by damaged expansion tank housing
• Visible aging, warping, or plastic deterioration in the original reservoir

Installation Notes and Tips

Verify the reservoir shape, mounting hole location, and cap style before installation. This part uses one mounting hole and does not include mounting hardware. Transfer any connected hoses or level-sensing components only if your vehicle setup requires them, since no level sensor is included. For best results, inspect the cooling system for leaks and confirm the cap seats fully after installation.

Quality Assurance

Autotecnica backs this replacement part with a two-year, unlimited mileage warranty. It is a solid choice for DIY repairs and professional service work when replacing a coolant reservoir on Chevrolet Astro or GMC Safari models. Part number GM0718797 is the reference to use when confirming application details.