Engine Bolt, 10mm X 70mm Long, for Aircooled VW, Each

OVERVIEW

When it comes to the structural integrity of your air-cooled powerplant, there is no room for compromise. This 10mm x 70mm engine-to-transmission mounting bolt is a critical component designed to provide a rock-solid connection between your Volkswagen engine case and the transaxle bellhousing. Over decades of service, original factory hardware often suffers from "fatigue," "stretching," or severe corrosion, especially in regions where road salt and moisture are prevalent. Replacing your aged, rounded, or rusted mounting hardware with this high-strength EMPI bolt ensures that your drivetrain remains properly aligned and securely fastened. Whether you are performing a routine engine pull or completing a ground-up restoration, using fresh, high-quality hardware is the hallmark of a professional build and prevents the nightmare of a sheared bolt during high-torque maneuvers.

Precision-engineered to meet or exceed original equipment specifications, this bolt features a 10mm diameter and a 70mm length, making it the ideal choice for the upper mounting positions on the VW air-cooled engine. The high-tensile steel construction is complemented by a protective finish that resists the harsh environment of the engine bay, where heat cycles and road grime are constant. Don''t risk your expensive engine case or transmission housing by reusing "mystery hardware" from your spare parts bin. This bolt provides the exact thread pitch and shank length required to achieve full thread engagement without bottoming out, ensuring maximum clamping force. It is an essential item for any Beetle, Bus, or Ghia owner who values reliability and peace of mind every time they turn the key.

FITMENT

• Volkswagen Type 1 Beetle: 1950 through 1979 (Standard and Super Beetle)
• Volkswagen Type 2 Bus / Transporter: 1950 through 1971 (Early Bay and Split Window)
• Volkswagen Karmann Ghia: 1956 through 1974
• Volkswagen Type 3 (Fastback, Squareback, Notchback): 1961 through 1973
• Volkswagen Type 181 Thing: 1973 through 1974
• Custom Applications: Ideal for Dune Buggies, Sand Rails, and Trikes utilizing a VW Type 1, 2, or 3 transaxle.

SPECS

• Diameter: 10mm
• Length: 70mm (measured from under the head to the end of the threads)
• Thread Pitch: 1.5mm (Standard VW Metric)
• Material: High-tensile Grade Steel
• Finish: Zinc Plated for superior corrosion resistance
• Head Style: Standard Hex Head for easy socket engagement
• Quantity: Sold Individually (Each)
• Part Number Reference: N104707 / EMPI Brand

PRO TIPS

1. Clean the Threads for Accurate Torque

Before installing your new 70mm engine bolt, always take the time to run a 10mm x 1.5mm thread chaser or tap through the mounting holes in the transaxle bellhousing and the engine case. Over time, dirt, old grease, and oxidized metal can build up in these threads. If the threads are "dirty," your torque wrench will give you a false reading, indicating the bolt is tight when in reality the clamping force is insufficient. A clean thread ensures that the torque you apply goes directly into securing the engine, not overcoming friction from debris.

2. Use High-Quality Anti-Seize Lubricant

Because you are threading a steel bolt into a magnesium or aluminum alloy engine case, "galvanic corrosion" is a very real threat. This chemical reaction can cause the steel bolt to "weld" itself to the case over time, making future engine removals nearly impossible without damaging the threads. Apply a thin, even coat of nickel or silver-based anti-seize to the threads of the bolt before installation. This simple step will save you hours of frustration and potentially hundreds of dollars in machine shop fees the next time you need to pull the motor.

3. Don''t Over-Torque the Hardware

It can be tempting to "crank down" on engine mounting bolts to ensure they don''t move, but exceeding the factory torque specifications (usually around 22 to 25 foot-pounds for these 10mm bolts) can lead to disaster. Over-tightening can stretch the bolt beyond its elastic limit or, worse, pull the threads right out of the soft alloy engine case. Always use a calibrated torque wrench and tighten the engine-to-transmission bolts in a cross-pattern to ensure the engine sits flush against the bellhousing. If you feel the bolt "give" or get softer while tightening, stop immediately, as you may be stripping the case threads.