Restoring a Porsche 912 is a rewarding project, but finding the right parts can be challenging. Unlike the more popular 911, the 912 shares many components with the early 911 but has unique parts specific to its four-cylinder engine and chassis. This guide covers the key categories of restoration parts, what to look for, and where to source them, helping you make informed decisions for your build.
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The 911 and 912 Porsche, A Restorer's Guide to Authenticity II (Authenticity Series)
Understanding the Porsche 912
Introduced in 1965, the Porsche 912 was essentially a 911 with a 1.6-liter flat-four engine derived from the 356. It offered lighter weight and better fuel economy, making it a practical sports car. Production ran through 1969, with a brief 1976 revival for the US market. When restoring a 912, you’ll find that many body and interior parts interchange with early 911s (1965-1969), but the engine, transmission, and some trim pieces are unique.
Engine and Drivetrain Parts
Engine Components
The 912’s 616/36 engine is a four-cylinder pushrod design. Key parts to source include:
- Cylinders and pistons: Often need replacement due to wear. Use OEM or aftermarket like Mahle or JE Pistons.
- Heads: Can crack between valves; look for NOS or rebuilt units.
- Valves and guides: Exhaust valves are prone to failure; upgrade to sodium-filled for durability.
- Carburetors: Solex 40 PII-4 are original but finicky. Many restorers switch to Weber 40 IDFs for better reliability.
- Oil cooler and lines: The original oil cooler may leak; replace with an early 911-style unit.
Transmission and Clutch
The 912 uses a 901 or 902 four-speed manual (or optional Sportomatic). Parts like synchros, bearings, and shift forks are available from specialists. The clutch assembly is similar to 911 but with a different disc; ensure you order the correct 912-specific set.
Body and Sheet Metal
Rust Repair Panels
Rust is the biggest enemy. Common trouble spots include:
- Floor pans and longitudinals: Complete replacement panels are available from suppliers like Stoddard and Restoration Design.
- Fenders: Front fenders are similar to 911 but have different headlight buckets. Rear fenders are unique to 912/911 up to 1969.
- Rocker panels and door bottoms: Pre-formed rocker panels bolt or weld in.
- Battery tray and inner fenders: Often rusted out; patch panels exist.
Glass and Seals
Windshields are the same as early 911, but some seals differ. Use original-style rubber seals from Precision or URO to ensure proper fit. Window regulators and tracks are still available new.
Interior and Trim
Seats and Upholstery
Original 912 seats are the same as 911 but with vinyl or leatherette covers (optional leather was rare). Complete upholstery kits from Autos International or GAHH are available in original patterns. Door panels, carpet sets, and headliners are also reproduced.
Dashboard and Gauges
The dashboard is nearly identical to 911, but the instrument cluster has a four-cylinder tachometer (redline at 6000 rpm). Gauges can be restored by specialists like Palo Alto Speedometer. Replacement switches, knobs, and glovebox parts are easy to find.
Suspension and Brakes
Shocks and Springs
The 912 uses torsion bar suspension front and rear. Stock torsion bars can be replaced with thicker ones for improved handling. Shock absorbers from Koni or Bilstein are direct fit. Use genuine rubber bushings through a factory or aftermarket source like Elephant Racing.
Brake System
Early 912s have drum brakes at the rear (later models have discs). Complete brake kits include calipers, rotors, and pads. Master cylinders and wheel cylinders are available new. Upgrade to 911-style brakes for better stopping power.
Electrical and Lighting
The 912 has a 6-volt electrical system (1965-1967) or 12-volt from 1968 onward. If converting to 12 volts, you’ll need a new alternator, voltage regulator, and all bulbs. Replacement wiring harnesses are made by manufacturers like YnZ’s, matching the original fabric-covered wires. Headlights, tail lights, and reflectors are reproduced to exact specs.
Where to Find Quality Parts
Specialized Porsche Suppliers
Stoddard NLA, Pelican Parts, and Restoration Design are reliable sources for genuine OEM and high-quality reproduction parts. They offer technical support and often have parts not found elsewhere.
OEM and NOS Parts
Original Porsche parts are increasingly rare. Check eBay and classifieds for NOS (new old stock) items, but verify authenticity. Many pre-1969 parts have been discontinued.
Aftermarket vs Reproduction
Aftermarket parts can save money, but quality varies. For visible items like badges and trim, only buy German-made reproductions. For mechanical parts, choose reputable brands like Mahle, Bosch, or Sachs.
Final Recommendations
Start with a thorough inspection of your 912. Identify what’s beyond repair and prioritize safety items like brakes, suspension, and steering. Use a parts catalog from a trusted supplier to cross-reference part numbers. Join a Porsche 912 registry or forum for advice on sourcing rare components. Expect to spend more on engine and body parts than interior trim. Buy the best quality you can afford, especially for sheet metal, as poor-fit panels compromise the restoration.
Remember, patience is key. Some parts may require months of searching. But with the right components, your 912 will be a joy to drive and a sound investment.