front engine cover that seals the timing chain/belt area.
• The large circular hole is for the front crankshaft seal, which prevents oil leaks where the crank exits the block.
• The embossed Chevrolet “bowtie” and lettering suggest it’s an OEM (original equipment manufacturer) chrome cover, likely from the 1960s–70s era when chrome dress-up parts were popular.
Where It Fits
• Typically used on Chevy big block 454
• It bolts to the front of the engine block, covering the camshaft gear and timing chain.
• Chrome versions like this were often used for show cars, hot rods, or aftermarket dress-up kits, though some factory engines also had them.