Porsche Standard #8 Main Nose Bearing (1978–2005) 964-101-138-01-OEM | OEM Engine Bearing

Rebuild your Porsche engine with confidence using the Porsche Standard #8 Main Nose Bearing (964-101-138-01). This OEM-quality bearing provides precise crankshaft alignment, ensuring smooth rotation, reduced friction, and reliable oil distribution. Designed for Porsche 911, 930, 964, and 993 models from 1978 to 2005, this standard-size bearing is an essential part of any professional engine rebuild or restoration.

Key Features

• OEM Porsche Bearing – Manufactured to precise factory tolerances for reliable engine performance

• Fits Porsche 911, 930, 964, and 993 Models (1978–2005) – Designed for both naturally aspirated and turbocharged engines

• Standard Size Fitment – Perfect for stock rebuilds requiring no oversized machining

• Durable Alloy Construction – Combines steel backing with aluminum overlay for strength and heat resistance

• Improves Crankshaft Stability – Ensures smooth rotation and consistent oil pressure

• Prevents Engine Wear – Reduces friction and vibration for extended engine life

• Ideal for Rebuilds and Restorations – Recommended for complete engine overhauls or bearing replacement service

Frequently Asked Questions (FAQ)

1. What does the #8 main nose bearing do in a Porsche engine?
It supports the front of the crankshaft, maintaining alignment and stability while allowing smooth rotation and proper lubrication throughout the engine.

2. Which Porsche models use this bearing?
This bearing fits Porsche 911, 930, 964, and 993 engines built between 1978 and 2005.

3. Is this a standard size bearing?
Yes, this is a standard-size #8 nose bearing, suitable for crankshafts that have not been machined undersize.

4. What materials are used in this bearing?
It is made from a precision-machined steel backing with an aluminum alloy surface for durability, heat resistance, and oil retention.

5. When should I replace the main nose bearing?
Replace the bearing during any engine rebuild, crankshaft service, or if there are signs of wear such as low oil pressure, vibration, or metallic debris in the oil.