Mounting Kit for Heat Exchanger. Porsche 911 1983-89  ❭  91104KIT

Mounting Kit for one Heat Exchanger 
2 required per car

Restore the security and reliability of your Porsche exhaust system with this OE Match Heat Exchanger Mounting Kit, designed specifically for the Porsche 911 3.2 Carrera (1984–1989) and the 930 turbo (1984-1989). Manufactured to original equipment specifications, this comprehensive fitting kit contains the essential hardware required to securely install the heat exchangers, ensuring correct alignment, reliable sealing and long-lasting durability.

Fits:

• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1978-1989 3.3L Turbo (930)

 Whether you're replacing tired heat exchangers, installing a new exhaust system or carrying out a concours-quality restoration, fitting new mounting hardware ensures every component is correctly secured while reducing the risk of vibration, exhaust leaks and premature hardware failure.

What Does the Heat Exchanger Mounting Kit Do?

The heat exchanger mounting kit provides the fixings needed to attach the heat exchangers securely to the engine and exhaust system. It plays an important role by:

• Securing the heat exchangers to the engine.
• Maintaining correct exhaust alignment.
• Supporting efficient cabin heating performance.
• Reducing vibration and unwanted movement.
• Helping maintain leak-free exhaust joints.
• Allowing for normal expansion and contraction as exhaust temperatures change.

Correct mounting hardware is essential for maintaining both exhaust efficiency and the performance of the Porsche heating system.

Why Do Heat Exchanger Mounting Kits Fail?

The mounting hardware operates in an extremely demanding environment, exposed to continuous heat, moisture and vibration. Over time, components can fail due to:

• Corrosion caused by road salt and moisture.
• Heat cycles weakening fasteners.
• Rusted or seized nuts and bolts.
• Fatigue caused by engine vibration.
• Damage during previous exhaust repairs.
• Age-related deterioration after decades of service.

As the hardware deteriorates, the heat exchangers can loosen, resulting in exhaust leaks, rattles, poor alignment and additional stress on surrounding components.

When Should the Heat Exchanger Mounting Kit Be Replaced?

The mounting hardware should be inspected whenever the exhaust or heat exchangers are removed. Replacement is recommended if you notice:
Rusted or seized fasteners.

• Broken or stretched hardware.
• Loose heat exchangers.
• Exhaust leaks around mounting flanges.
• Excessive vibration or rattling.
• Damaged washers, locking plates or mounting brackets.

Most Porsche specialists recommend fitting a new mounting kit whenever new heat exchangers are installed, ensuring reliable installation and avoiding the reuse of weakened or corroded fixings.