Cometic
Cometic Mercury / Chevy Big Block 4.5in Bore .030 inch MLS Headgasket
Cometic Mercury / Chevy Big Block 4.5in Bore .030 inch MLS Headgasket
Part number: CGSC5638-030
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- Free fitment check before you order
Listed for: Chevrolet Big BlockFitment notes & questions
Mercury / Chevy Big Block 4.5in Bore .030 inch MLS Headgasket by Cometic for Chevrolet and Mercury. The head gasket seals the cylinder head to the block, keeping combustion pressure in the cylinders and coolant and oil in their own passages.
Quick facts
- Brand: Cometic
- Part type: Head gasket
- Listed for: Chevrolet and Mercury
Tip: Most head gaskets call for new head bolts and a flat, clean deck surface. Check the head and block before you reassemble.
About this head gasket for the Chevrolet Big Block
Head gasket jobs take the top of the engine apart, which is why most people replace the related gaskets and bolts at the same time.
Fitment notes
- Listed for: Chevrolet Big Block.
- Specs, lead time and warranty come from Cometic and can change. The details above this guide are the latest we have.
Not sure it fits? Send us your year, make, model, engine and trim and we'll check before you order.
Ask about fitmentParts that usually go with it
- Head bolts. Many engines use torque-to-yield head bolts that should not be reused.
- Coolant. Refill with the coolant type your engine calls for.
- Valve cover and intake gaskets. They come off during the job, so it is the time to replace them.
More for your car: Mercury Parts · Chevrolet Parts · All Head Gaskets · Engine
Questions about Chevrolet Big Block head gasket
Will this fit my Chevrolet Big Block?
What are signs of a bad head gasket?
Should I resurface the cylinder head?
Where do specs and warranty details come from?
Questions & answers
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