When rebuilding or upgrading the engine in a Porsche 914 equipped with the Type 4 flat-four, one of the most critical components is the camshaft. The part number 021.109.101K appears frequently in discussions and parts catalogs, but understanding exactly what it is, which engines it fits, and how it compares to other options can be confusing. This article provides a clear, practical breakdown of the 021.109.101K camshaft for the Porsche 914 Type 4 engine, covering its specifications, applications, installation notes, and alternatives.
Understanding the Part Number 021.109.101K
The VW/Audi group part number system can appear cryptic, but each segment conveys useful information. The prefix "021" identifies the engine family: the VW Type 4 engine (used in the 411, 412, and later in the Porsche 914). "109" is the generic code for camshafts in VW parts numbering, and "101K" is a suffix that distinguishes this specific grind and material from others. The "K" often indicates a particular cam profile or a revised version.
Original Equipment vs. Aftermarket
The 021.109.101K camshaft is an original equipment (OE) part that was used in certain Type 4 engines from the factory. It is not a high-performance race cam; rather, it is a stock replacement for engines that originally came with this grind. This particular camshaft was commonly installed in 1.7L and 1.8L Type 4 engines found in the Porsche 914 from 1970 through 1973, though some later engines also used it.
Applications for the 021.109.101K Camshaft
Porsche 914 Models
The most common application is the Porsche 914 with the 1.7L or 1.8L Type 4 engine. The 1.7L (engine code W, X, or Y) and the 1.8L (engine code EA or EB) both used this camshaft as a stock component. The cam provides a good balance of low-end torque and mid-range power, suitable for everyday driving and stock performance levels.
VW Type 4 Vehicles
Beyond the 914, the 021.109.101K camshaft was also used in VW 411 and 412 models with the 1.7L and 1.8L engines. However, because those vehicles are less common in the United States, most demand comes from 914 owners.
Compatibility Considerations
If you are replacing a camshaft in a 914, check your engine code. The 021.109.101K is a direct replacement for original cams with part numbers 021.109.101 (without K) and 021.109.101A through 021.109.101J. It is also compatible with aftermarket cam followers (lifters) designed for the stock cam profile. Do not use it with high-lift rockers or heavy valve springs not intended for stock cams, as the cam lobes may not have the necessary hardness or profile.
Technical Specifications of the 021.109.101K
Understanding the cam's specs helps you decide if it fits your performance goals.
- Duration: Approximately 252° advertised duration (intake and exhaust). Actual duration at 0.050 inch lift is around 210°.
- Lift: Approximately 0.390 inch (9.9 mm) at the valve (with stock rocker ratio).
- Lobe Separation Angle (LSA): Roughly 112°.
- Valve Timing: Standard for a mild street cam, providing a smooth idle and strong vacuum for brake boosters.
- Material: Chilled cast iron, which is durable for stock valvetrain loads but not intended for high-rpm or stiff valve springs.
These numbers place the 021.109.101K firmly in the "stock replacement" category. It is not a performance upgrade, but it is a reliable choice if you want to keep your 914 running as it left the factory.
Installation Considerations for the 914 Type 4
Replacing a camshaft in a Type 4 engine requires some specific steps due to the engine layout. The 914 engine is mounted midship, making access tight but still manageable with the correct tools.
- Timing Cover: You will need to remove the fan housing, alternator, and fan belt to access the timing cover. The cam sprocket is behind a metal cover on the front of the engine.
- Camshaft Alignment: The camshaft gear has a keyway that must align with the crankshaft timing mark. The Type 4 engine uses a single-row timing chain and a tensioner. When installing a new cam, always replace the timing chain, chain guides, and tensioner pad.
- Breaking In: New camshafts require proper break-in procedure. Use a high-zinc break-in oil or add a zinc additive to the oil. Run the engine at 2000-2500 rpm for 20 minutes, varying speed, to seat the cam lobes against the lifters.
- Valve Adjustment: After break-in, let the engine cool completely, then adjust the valves to the stock clearance (usually 0.006 inch intake and 0.008 inch exhaust for a cold engine).
Common Alternatives to the 021.109.101K
If you are looking for a different performance level, consider these aftermarket cams that fit the Type 4 engine:
Web Camshafts 86a
A mild upgrade, the Web 86a offers slightly more lift and duration but maintains good vacuum and idle quality. It works well with dual Weber or Dellorto carburetors in a 914.
Schneider 1040
Another good street cam for the Type 4, the Schneider 1040 has similar specs to the 021.109.101K but with a bit more lift. It is a popular choice for stock-displacement engines.
Stock Replacement vs. Performance
If your goal is simply to restore a 914 to factory specifications, stick with the 021.109.101K. It is the correct part for many 1.7L and 1.8L engines. If you want more power and have upgraded carburetors and exhaust, choose a cam designed for that application. Note that performance cams will change idle quality and may require different lifters and dual valve springs.
Buying Tips for the 021.109.101K Camshaft
- Verify Origin: Many aftermarket companies sell replacement camshafts under the same part number. Look for a reputable manufacturer known for quality cams, such as Elgin, Sealed Power, or genuine VW (if available).
- Check Cam Bearings: When replacing the cam, replace the cam bearings as well. They are inexpensive and ensure proper oil clearance.
- Lifters: Always replace lifters with a new cam. Use lifters designed for the stock cam profile. Some aftermarket cams require specific lifters, but for the 021.109.101K, standard VW Type 4 lifters work.
- Avoid “NOS” (New Old Stock): Old camshafts may have been sitting on a shelf for decades. The boxes might be correct, but the cam could be damaged or have incorrect hardening. Buy from a current production source when possible.
- Price Expectation: A new stock replacement camshaft for the Type 4 typically costs between $150 and $250. If you find one significantly cheaper, inspect it carefully for rust, pitting, or bent lobes.
Final Recommendation
For Porsche 914 owners restoring a 1.7L or 1.8L Type 4 engine to factory specifications, the 021.109.101K camshaft is the correct choice. It provides predictable performance, a smooth idle, and long service life when installed with proper break-in procedures. If your engine has been modified with aftermarket carburetors, headers, or high-compression pistons, consider a mild performance cam like the Web 86a or Schneider 1040 instead. Always pair a new cam with fresh lifters, timing chain, and bearings, and follow the break-in guidelines to ensure many miles of reliable driving in your 914.