1999 GM 6.5L V8 – Thermostat Installation (L56, L65, L65-CMT)

1. Install the thermostat bypass connector.

2. Install the thermostat bypass hose and clamps.

3. Install the thermostat housing and gaskets.
Notice : Refer to Fastener Notice in Cautions and Notices.

4. Install the bolts and stud/nut.
Tighten
Tighten the bolts and the stud/nut to 42 N-m (31 Ib ft).

5. Install the engine coolant temperature (ECT) sensor.

6. Install the fuel bleed valve and nut.
Tighten
Tighten the stud/nut and nut to 41 N-m (31 Ib ft).

7. Install the seals onto the thermostats.
• The seals have a split, inner edge, which install over the flange on the thermostats.
• The seals have a bead on the surface that faces the water outlet.

8. Install the thermostats in the thermostat housing.

9. Install the water outlet.

10. Install the bolts/studs.
Tighten
Tighten the bolts/studs to 47 N-m (35 Ib ft).

 

Leave a Reply

Your email address will not be published. Required fields are marked *