Capricorn

Capricorn for Porsche

For over 20 years Capricorn Automotive Ltd has been at the leading edge of forged and billet machined piston design and manufacture. Utilising the very latest in material developments, advancements in design and the latest in machining technology we help our Porsche customers, the leaders in motorsport and automotive to stay ahead of their competition.

Choosing the Right Fit for Your Porsche

Where Capricorn 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 upgrading from standard components during an engine rebuild, improving durability for hard use, or replacing items that have reached the end of their service life.
• Common triggers for replacing engine-related parts include low compression, oil consumption, abnormal noises, oil pressure instability, overheating history, and metallic debris found during inspection.
• Before committing to major work, it is sensible to carry out checks such as compression and leak-down tests, borescope inspection where possible, and a careful review of oil condition and service history.
• When planning performance upgrades or tuning, ensure the base engine is healthy and that supporting systems (cooling, lubrication and fuelling) are in good order before increasing loads.

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 changed during a planned rebuild or when symptoms point to internal wear or damage. On Porsche engines this often follows findings such as loss of compression, excessive oil consumption, persistent leaks, abnormal noises or contamination discovered during inspection, and owners will usually refresh chains, guides, seals, bearings and gaskets while the engine is apart.

• Before deciding on a full rebuild, carry out compression and leak-down tests, inspect the bores where possible, and check for debris in the oil or filter.
• Plan the scope of parts in one go so that hard-to-access wear items can be replaced together, reducing the chance of repeat strip-downs.

Engine Cylinders / Liners / Pistons — Cylinders, liners and pistons are replaced when wear, scoring, ovality or damage prevents proper sealing and reliable performance. In Porsche applications this is usually addressed during a rebuild prompted by low compression, excessive oil use, piston slap noises, evidence of scoring or after overheating or detonation events, and some owners choose upgraded components to improve durability or support higher outputs.

• Check compression and leak-down results, inspect bores and pistons during teardown, and look for signs of scoring, detonation damage and excessive blow-by before selecting replacement parts.
• Match pistons, rings and cylinders as a set so clearances and materials are compatible for the intended use.

Cylinder Liner — Cylinder liners are used where the bore surface needs to be restored or upgraded, for example to repair scored or worn cylinders, correct ovality or provide a stable wear surface in demanding applications, and are typically specified once measurements show that the existing bores no longer meet tolerance.

• Have the block assessed by a specialist to confirm whether it is suitable for liners and what machining will be required.
• Ensure the liner specification is matched to the piston and ring package, with attention to clearances and intended operating conditions.

Engine Tuning — Engine tuning parts are chosen to refine drivability, throttle response and power delivery or to support hardware changes such as intake, exhaust or forced induction upgrades on suitable Porsche engines, and are normally applied once the base engine and supporting systems have been confirmed healthy.

• Before tuning, check for fault codes, verify there are no boost or vacuum leaks, and confirm that fuelling, ignition and cooling systems are working correctly.
• Use data logging where possible to monitor temperatures, knock activity and fuelling after changes, adjusting the setup if required.

Capricorn Engine parts — Capricorn engine parts form a branded group of components used in Porsche engine rebuilds and upgrades where owners want consistent specifications and known compatibility, typically selected to improve reliability, strength or precision compared with generic options during performance builds or intensive use.

• Choose components as part of a matched package where they interact (for example pistons with cylinders and rods) to help ensure correct clearances and behaviour.
• Base the final parts list on accurate measurements and a clear understanding of the engine’s intended use, aiming to address root causes of previous wear or failures.

Explore Capricorn at Design911

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