Holley's cast aluminum timing chain cover is a durable upgrade from the plastic OEM cover found on 1996-up Vortec small-block Chevy engines, offering improved durability and functionality along with a molded-in timing indicator.
Specifications:
- Application: Small Block Chevy / Chevrolet VORTEC V8
- Category: Engine
- Crank Sensor Provision: Yes
- Finish: Natural
- Gaskets Included: Yes
- Material: Aluminum
- Product Type: Timing Chain Cover
- Sub Category: Valve Train Components
- Thickness: Standard OEM
- Part Number: 21-152
Replaces GM part numbers 10244600, 12523972, 12523973, 12558343, 12562818, and 93800970. Fits both Small Block Chevy (SBC) and Vortec-series SBC applications — note that mounting holes at the 10 and 2 o'clock positions are not used on Vortec-series engines, and supplied dowel pins are for Vortec-series fitments only (early SBC blocks already have dowel pins installed). Includes an over-molded FKM oil seal, gasket, corrosion-resistant E-coated hardware, and dowel pins; designed for use with 8" Vortec balancers and compatible with both stock and aftermarket water pumps.
FAQ
What engines does this timing cover fit?
Small Block Chevy and 1996-up Vortec-series small-block Chevy engines.
Does it include a crank sensor provision?
Yes, this version includes a crank sensor provision for EFI applications.
What GM part numbers does it replace?
GM part numbers 10244600, 12523972, 12523973, 12558343, 12562818, and 93800970.
Is a gasket included?
Yes, a high-quality gasket and corrosion-resistant E-coated mounting hardware are included.
Do the mounting holes differ between SBC and Vortec applications?
Yes, the 10 o'clock and 2 o'clock mounting holes are not used on Vortec-series fitments, and the supplied dowel pins are for Vortec-series engines only.
