Heat exchanger removing and installing

— Raise car and support in a safe manner.

Make sure the car is stable and well supported at all times. Use a professional automotive lift or jack stands designed for the purpose. A floor jack is not adequate support.

Dry Cell Hho Diagram

^ Lubricate exhaust header to cylinder head fasteners (arrows).

Muffler and muffler support

Cylinder Head Heater Well

1. Flange to catalytic converter

2. Muffler support

3. Muffler

4. Muffler support straps

5. Muffler strap alien bolts

Muffler and muffler support

Porsche 911 Heat Exchanger Removal

— Lower heat exchanger down and out.

— Installation is reverse of removal. • Use new gaskets and hardware.

Detach heater hoses (arrows) from heat exchanger.

• Loosen clamps and slide rubber boot back on heater blower cross-over tube.

• Loosen clamp and slide off heater hose that runs between body and heat exchanger.

— Left side: Remove three M8 fasteners connecting heat exchanger to catalytic converter.

— Right side: Remove three M8 fasteners connecting heat exchanger to crossover pipe.

^ Remove exhaust header to cylinder head mounting nuts (arrows).

• Three fasteners are locking nuts.

• Three are alien-head nuts.

Support heat exchanger while removing the fasteners.

— Lower heat exchanger down and out.

— Installation is reverse of removal. • Use new gaskets and hardware.

Tightening Torques

• Exhaust runner to cylinder head 25 Nm (18 ft-lb)

Catalytic converter assembly

Catalytic converter assembly

Oxygen Sensor Flange

1.

Oxygen sensor

6.

Catalytic converter heat

2.

Oxygen sensor heat shield

shield

3.

Heat exchanger flange and

7.

Heat shield support

gasket

bracket

4.

Catalytic converter

8.

Heat shield mounting

5.

CO test port

hardware

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