Porsche 944 Timing Gear Part Number: Complete Guide

If you own a Porsche 944, you know the timing belt and gear are critical for engine health. The timing gear—often called the crankshaft sprocket or camshaft gear—drives the timing belt, which synchronizes the camshaft and crankshaft. Using the wrong part number can lead to misalignment, belt slip, or engine damage. This guide covers everything you need to know about the Porsche 944 timing gear part number, including how to find it, OEM vs. aftermarket choices, and practical tips for replacement.

Understanding the Timing Gear in the Porsche 944

The Porsche 944 uses a timing belt system, not a chain. The timing gear is typically a toothed sprocket mounted on the crankshaft (lower gear) and camshaft (upper gear). The most common timing gear replacement involves the crankshaft sprocket, which can wear out or become damaged over time, especially if the timing belt breaks. The factory part number is essential for ensuring correct tooth count, diameter, and keyway alignment.

There are two main timing gears in the 944: the crankshaft gear and the camshaft gear. The crankshaft gear is splined and fits onto the crank nose; the camshaft gear is bolted to the camshaft. Both must match the belt pitch and tooth profile. The 944 engine (2.5L inline-four) uses an 8-valve head with a specific gear design.

Where to Find the Timing Gear Part Number

Locating the correct part number for your Porsche 944 requires narrowing down the year, engine type, and whether the car has ABS or other options. The timing gear part number is usually stamped on the gear itself. If the original gear is still installed, you can read the number with a mirror and flashlight. On the crankshaft gear, look on the flat face near the center; on the camshaft gear, it may be on the back side or outer rim.

If the gear is already removed or damaged, use your car’s VIN to cross-reference with OEM parts catalogs. Porsche parts diagrams are available online from dealer websites or enthusiast forums. Note that early (1982-1985) and late (1985.5-1989) models have different timing belt systems—the late model uses a different tensioner and slightly different gear design.

OEM Porsche 944 Timing Gear Part Numbers

Original equipment manufacturer (OEM) part numbers for the 944 timing gear vary by year and position. Here are the most common:

• Crankshaft Gear (sprocket): For 1982-1988 944 (non-turbo), the OEM number is 944 102 111 02 (supersedes earlier versions). For the 944 Turbo (951), it's 951 102 111 00. For the 944S (16-valve), it's 944 102 111 03.
• Camshaft Gear: Non-turbo 8-valve: 944 102 211 00. Turbo 8-valve: 951 102 211 00. 16-valve (944S): 944 102 211 01.

Always check for superseded numbers. Porsche often updates parts with minor revisions. The latest supersession is usually the best choice, as it may incorporate improvements.

Aftermarket Alternatives for the Timing Gear

Several reputable brands manufacture timing gears for the Porsche 944. Aftermarket options can be less expensive than OEM but must meet the same specifications. Look for gears made from hardened steel or sintered iron. Avoid unknown brands; stick to names like Gates, Continental, Febi Bilstein, Lucas, or ECSTuning. These companies often produce gears that exactly match OEM dimensions.

Aftermarket gears usually have their own part numbers. For example, Gates offers a crankshaft gear with part number T420-000A for the 944. Cross-reference these with your vehicle year to ensure fitment. Some aftermarket gears are sold as kits that include the belt and tensioner—this can be a cost-effective way to do a full timing service.

Caution: Some cheap aftermarket gears have been reported to have incorrect keyway or spline fit. Stick to well-known suppliers and read user reports on enthusiast forums before purchasing.

Common Problems with the Timing Gear

The timing gear itself is a robust component, but problems arise from:

• Worn keyway: The crankshaft gear is locked onto the crank with a Woodruff key. If the keyway becomes enlarged or the key shears, the gear can slip, destroying timing.
• Belt debris: A broken timing belt can damage the gear teeth, requiring replacement.
• Corrosion: On cars stored in humid environments, the gear can rust, causing belt wear.
• Misalignment: Using the wrong part number or installing without proper tools can lead to offset.

Regularly inspect the gear when replacing the timing belt (every 30,000 miles or 4 years). Replace the gear if you see any wear, pitting, or loose fit on the crank.

Installation Considerations for the Timing Gear

When installing a new timing gear, use proper tools:

• Crankshaft holding tool (cannot rely on the gear bolts alone).
• Torque wrench: Follow factory specifications (crankshaft bolt: 80 ft-lb plus 90° turn; camshaft bolt: 30 ft-lb).
• Alignment tool: A camshaft locking tool makes timing alignment easier.

Always replace the Woodruff key if it shows any wear. Clean the crankshaft nose and gear bore thoroughly. Apply a small amount of engine oil to the seal surface. When tightening the crankshaft bolt, ensure the gear is fully seated.

After installation, rotate the engine by hand two full revolutions to check for binding. Recheck timing marks before starting.

Final Recommendation

For most 944 owners, the safest choice is to use an OEM Porsche timing gear (part number as listed above) purchased from a dealer or a reputable online parts retailer, ensuring you get the latest supersession. If you prefer aftermarket, go with Gates or Continental—they have a solid reputation. Avoid unknown eBay or Amazon sellers unless you can verify the part. Replace the gear while doing the timing belt and tensioner, even if the old gear looks fine. This preventive step avoids future failure. Always confirm the part number with your car’s year and VIN.

Getting the correct Porsche 944 timing gear part number is straightforward if you know where to look. Whether you go OEM or aftermarket, quality and accurate fitment are non-negotiable for reliable engine operation.