Cometic

Cometic for Porsche

Cometic Gasket Inc. is a leading worldwide supplier of gaskets and engine sealing solutions for the Automotive Performance, Powersports, Original Equipment and Remanufactured Engine Industries. No matter what you ride, Cometic Gasket can seal your Porsche engine so you can focus on the finish line. All Cometic products are made in the United States with materials manufactured on American soil.

A Quick Look at Cometic

Cometic Gasket Inc. information on this page is based on details supplied by the manufacturer or distributor, plus any OE references provided with the parts.

Choosing the Right Fit for Your Porsche

Where Cometic is listed for Porsche, use the supplied model coverage and OE references to confirm suitability. Check details that commonly affect fitment such as model year, side/position, and connector type where relevant.

• Typical reasons to choose these parts include improving sealing under heat and load, reducing repeat leaks, and using known-quality materials during a Porsche engine rebuild or performance upgrade.
• Common issues that lead to gasket replacement include oil or coolant leaks, repeated gasket failure, contamination from poor surface preparation, and overheating-related sealing breakdown.
• Watch for symptoms such as fluid leaks, burning oil smells, or cross-contamination of oil and coolant, and investigate warped surfaces, incorrect torque procedure, or dirty mating faces before blaming the gasket itself.
• Before committing to major work, use basic checks where appropriate such as compression and leak-down testing, bore inspection, and careful examination of oil and filters for debris.
• Good preparation and correct torque sequence/settings are critical; clean mating faces and verify flatness to help the gasket perform as intended.
• For performance builds, always confirm the specific Cometic application against your Porsche engine spec, especially where machining or altered compression ratios may be involved.

Browse by Category

If you already know the area you are working on, start with the category and then filter by Porsche model. Where real-world symptoms and typical reasons to replace are provided, use them to keep the wording grounded.

Engine Rebuild Parts — Engine rebuild parts are typically renewed during a planned Porsche engine rebuild or when symptoms point to internal wear, such as loss of compression, excessive oil use, persistent leaks, abnormal noises, or contamination found during inspection. Many owners and specialists choose to replace bearings, chains, guides, seals, fasteners, and gaskets together while the engine is apart to reduce the risk of repeat strip-downs and to improve reliability once rebuilt.

• Before deciding on a full rebuild, carry out structured checks such as compression and leak-down tests, borescope inspection, and oil/filter examination, and confirm that issues are not caused by ancillary components.
• When the engine is out, consider a "while you are there" approach to hard-to-access wear items to avoid additional labour later.

Gaskets & Sets — Gaskets and gasket sets are replaced whenever joints are opened during servicing and when leaks develop from age, heat cycles, or previous incorrect installation. On Porsche engines, owners often opt for complete sets during rebuilds so that all common leak points are addressed together, helping to prevent repeat strip-downs and keeping oil and coolant contained for cleaner, more reliable running.

• Use fresh gaskets rather than reusing old ones, and consider complete sets for rebuilds to avoid missing small but critical seals and O-rings.
• Alongside new gaskets, it is often sensible to renew sealing washers, key O-rings, and any brittle breather or vacuum hoses disturbed during the job.

Explore Cometic at Design911

View the current Cometic range for Porsche at Design911, then filter by model and category to narrow down to the right parts.