Westwood

Westwood for Porsche

The company originally started as Westwood Trading over 19 years ago, and then merged with its sister company, to form Westwood Cylinder Liners Ltd. Duncan Andrews and his late father Paul Andrews have over 40 years experience in the engine remanufacturing industry. Our family have been involved with the rebuilding of engines since the 1930’s. Duncan Andrews Great Grandfather, Billy Andrews started an engine rebuilding company after the First World War. Our customers include leading Porsche engine reconditioners and rebuilders and race engine builders.

Choosing the Right Fit for Your Porsche

Where Westwood 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 people replace these parts include completing scheduled maintenance properly, resolving internal wear, and refreshing related components during an engine rebuild so the engine remains dependable.
• Common symptoms that may lead to replacement are misfit parts, premature wear, poor sealing, and repeat issues after repair when the wrong variant is used or related consumables (seals, fixings, gaskets) are not renewed.
• Before ordering, match your Porsche model and year carefully, and cross-check any part numbers or technical notes supplied.
• Where possible, confirm the underlying fault with tests and inspection so you are replacing the correct components, not just symptoms.

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 chosen when a Porsche engine shows internal wear or damage, or as part of a planned overhaul where gaskets, seals, bearings, chains, and hardware are renewed while the engine is apart to restore reliability and performance.

• Confirm the need for a rebuild with compression and leak-down tests, oil/filter inspection, and bore checks before committing to major parts spend.
• When planning a rebuild, consider replacing chains, guides, seals, and hard-to-access wear items at the same time to avoid repeat labour.

Engine Bearings / Shells — Bearings and shells are renewed to restore correct oil clearances and protect the crankshaft and rods, especially after low oil pressure events, high mileage, or contamination where wear patterns are visible on teardown.

• Low oil pressure, rumbling noises under load, or metallic debris in the oil are strong prompts to inspect and, if necessary, replace bearings.
• Always measure clearances, inspect crank journals, and address root causes such as oil starvation or overheating during bearing work.

Piston Rings — Piston rings are replaced when wear causes low compression, blow-by, and increased oil consumption, often as part of a top-end or full rebuild to re-establish proper sealing between piston and cylinder.

• Use compression and leak-down testing, plus observation of smoke behaviour, to distinguish ring issues from valve guide or seal problems.
• Plan for cylinder inspection and appropriate honing or machining when fitting new rings so they can bed in and seal correctly.

Engine Cylinders / Liners / Pistons — Cylinders, liners, and pistons are changed when scoring, ovality, or damage prevents reliable sealing, or when upgrading displacement and strength for higher-output Porsche builds.

• Scoring found on inspection, persistent low compression, or oil consumption that does not trace to external leaks often indicates the need for cylinder and piston work.
• Always treat pistons, rings, and cylinder surfaces as a matched system, checking clearances, materials, and coatings as a set.

Cylinder Head / Camshaft Carrier — Cylinder heads and camshaft carriers are addressed when there are oil leaks, valve guide wear, top-end noise, or overheating-related distortion, and are a key part of restoring compression and oil control on many Porsche engines.

• Smoking on overrun, oil around cam covers, or rough idle with low compression can all point towards top-end inspection and potential head work.
• During head and cam carrier work, plan for new gaskets and seals and follow any recommended checks on timing components and cooling systems.

Explore Westwood at Design911

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