The Porsche 912 first hit the market in 1965 as a way for Porsche to connect the gap between the 356, which was still in production at the time, and the 911. The 912 was intended to be a less expensive and significantly less powerful version of the 911. 

As a successor to the iconic Porsche 356, the 912 combined the elegant design and superior handling of the 911 with a 1.6-liter flat-four engine from the 356 SC. This reduced the power output from 95 to 90 horsepower at 5,800 rpm, but the result was a more stable 912 with more low-end torque and a 4-speed manual transmission to complement the setup.

By Lothar Spurzem – Own work, CC BY-SA 2.0 de, https://commons.wikimedia.org/w/index.php?curid=49881282

Even though production only lasted a few years, from 1965 to 1969, the 912 still holds a special place in the hearts of many car enthusiasts, who tout its unique blend of performance and vintage appeal. 

Ensuring this classic vehicle’s longevity and optimal performance means replacing some key service parts that have worn out with time or have seen superior innovations replace them. Here, we dive into the ten most commonly replaced service parts for the Porsche 912.

Engine Bottom End Gasket Set

Engine Bottom End Gasket Set. Porsche 356/ 912 – 61610190101

The engine bottom end gasket set is essential to maintaining a leak-proof engine. The set includes all the necessary gaskets and seals for the lower part of the engine to ensure it doesn’t leak, as that often affects performance.

So, if you notice any oil leaks or overheating, it may be a sign that you are due for a maintenance check. For the parts, you can find offerings such as the Porsche 356/ 912 – 61610190101 set from Elring.

Engine Gasket Set

Engine gasket set. Porsche 911 2.0L 1965-68 – 90110090201

The engine gasket set covers the entire engine, ensuring all joints and connections are sealed properly. Just like the engine bottom end gasket set, this is done to prevent leaks and maintain engine efficiency.

Given the age of the 912, these gaskets tend to wear and tear, making them one of the most commonly replaced parts. To get a complete set, check out products such as the Porsche 911 2.0L 1965-68 – 90110090201 set from Elring. It is made for engines with a WEBER carburetor TYP 911, which is perfect for the 912.

Exhaust Valve Kit

Engine cylinder head exhaust valve kit. Porsche 356 / 912 1.6ltr – 61610540650

The inlet valves control the intake of the air-fuel mixture into the engine cylinders. When they get worn out or damaged, drivers may start to notice a drop off in engine performance and reduced fuel efficiency.

At Design911, you can find the the OE MATCH Classic engine cylinder head exhaust valve kit, reference number 61610540650, which comes with a 2 year warranty for peace of mind.

Inlet Valve Kit

Engine cylinder head inlet valve kit. Porsche 356 / 912 1.6ltr – 61610540200

Like the exhaust valve kit, the inlet valve ensures the engine gets the right air mixture for combustion. 

Some of the inlet valve problems mentioned in forums include clearance issues, sticking due to carbon buildup (which can cause misfires and rough idling), wear and tear, and improper installation. Should you need a replacement, OEMATCH provides these under the reference number 6161050200.

High-Performance Valve Spring Seat and Retainer Kit

High performance valve spring, seat and retainer kit 9mm. Porsche 911 / 964 – HP109HSSKIT

The valve spring seat and retainer kit ensure the valves operate efficiently and smoothly. Drivers often want to upgrade to a high-performance kit, which can improve performance, especially under high-stress conditions.

The upgraded versions can easily handle higher spring pressures and RPMs, reducing the risk of valve float and ensuring reliable operation. Variants like the HP109HSSKIT from AASCO motor come in handy for this application. 

Pistons with Biral Cylinders

Retro Performance

One of the more popular upgrades for the Porsche 912 is pistons with Biral cylinders. They combine the strength of cast iron with lightweight aluminum. They have a cast iron sleeve surrounded by aluminum fins. 

It offers advantages such as improved heat dissipation and weight reduction. Combining JE forged pistons and Biral cylinders can significantly improve compression ratios and enhance power output.

Retro Performance offers several variants, including the 86mm big bore kits, to improve your durability and efficiency.

Connecting Con Rods

Connecting con rods SET OF 4. Porsche 912/ 356 (Carr Bolt) – 61610301203CARR

The connecting rods are critical components that connect the pistons to the crankshaft. Given their function, they wear out over time and become damaged, which could lead to engine knock or catastrophic failure.

High-performance rods, like those from Retro Performance or Pauter and CP-Carillo, use stronger materials that offer greater durability and more resistance to stress.

They may also feature improved designs, such as the X-beam or H-beam construction, to balance strength and weight reduction.

Big End Con Rod Bearing Set

Big End Con Rod Bearing Set STD Size. Porsche 912 356 – 61610314202

The big end con rod bearings are essential for the smooth operation of the connecting rods and crankshaft. The bearings wear out over time due to the friction and heat, and if left unchecked, this damage could lead to engine knock or loss of power.

Owners of the model can find readily available end con rod bearing sets made by reputable companies such as Kolbenschmidt.

The modern versions are performance-oriented, offering enhanced durability and performance compared to the originals.

Main Bearing Set

Main Bearing set. Porsche 356C / 912 – 616100138

Anywhere there are bearings in a car, attention is required to ensure they perform as intended. The main bearings in a Porsche 912 support the crankshaft and allow it to rotate smoothly within the engine block. 

When they are damaged or worn out, drivers may experience issues such as reduced oil pressure, severe engine damage, or engine knock. 

Dilaver Head Studs

Dilavar Head Studs Set of 24. Porsche 911- 964-993 1965-98 – DILAVARKIT02

Head studs are used to secure the cylinder head to the engine block. Dilavar head studs are designed to expand at the same rate as the engine, to prevent head gasket failures and keep the seal right.

The studs are made from a special alloy to achieve their neat trick. They are also coated to prevent corrosion, which was a common problem in earlier versions, leading to material fatigue and breakage.

Conclusion

The Porsche 912, with its blend of classic design and performance, remains a beloved model among car enthusiasts. Maintaining this iconic vehicle involves regularly replacing key service parts to ensure reliability and longevity. 

By focusing on the most commonly replaced components, owners can keep their 912s running smoothly and enjoy a unique driving experience that only this Porsche can provide. 

For those looking for high-quality replacement parts and expert advice, Design911 offers a comprehensive selection tailored to meet the needs of classic Porsche owners.

By dave_7 from Lethbridge, Canada – 1966 Porsche 912, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=34586743