For 1990-2009 cars

1. Install the NEW thermostat housing O-ring.
2. Install the thermostat housing.

Caution: Refer to Fastener Caution in the Preface section.

3. Install the thermostat housing bolts.

Tighten
Tighten the thermostat housing bolt to 10 N·m (89 lb in).

4. Install the NEW thermostat housing assembly O-ring and gasket.
5. Install the thermostat housing assembly.
6. Install the thermostat housing assembly bolts.

Tighten
Tighten the thermostat housing assembly bolt to 10 N·m (89 lb in).

7. Install the NEW heater inlet/outlet pipe assembly O-ring and gasket.
8. Install the heater inlet/outlet pipe assembly.
9. Install the heater inlet/outlet pipe assembly bolts.

Tighten
Tighten the heater inlet/outlet pipe assembly bolt to 10 N·m (89 lb in).