Entry 20 – Heater, Starter Solenoid, Fan

Heater Casing Assembly

Although it is probably not necessary to remove the heater case assembly from the firewall in order to remove the engine, I decided to go ahead and get it out of the way. I first disconnected the heater wiring. There was one black ground wire with ring terminal screwed to the blower box. A green/ yellow wire from the wiring harness connected via a bullet connector to a green/black wire to the heater, and a green/purple wire from the harness connected to a green/white wire to the heater.

Blower Ground Wire

Blower Ground Wire

Heater Remote Control

Heater Remote Control

Then I began to loosen the heater casing assembly mounting bolt/nuts that secured the heater box to the body. Two nuts on firewall studs and two bolts at the bottom of the box held it in place. The first to remove was the nut on the upper RH side of the box as you look at it from the front of the car. Then I removed a 1 1/2” long, 7/16” hex head bolt from the RH lower side of the box. That was followed by the removal of a nut from a firewall stud on the top LH side of the box. The fourth and final bolt was removed from the lower LH side of the box after the wiring harness was loosened from its mounting clips, and the hard heater water pipes were removed. Removing these later items made it possible to access the fourth box mounting point.

Heater Mess

Heater Mess

Heater Top RH Mount

Heater Top RH Mount

Heater Lower RH Mount

Heater Lower RH Mount

Heater Schematic

Heater Schematic

Next, I removed the Feed Pipe from Inlet Manifold to Heater (22) and the Rear Return Pipe, On Scuttle, At Rear of Cylinder Block (31). I first cut to remove the Hose Connecting the Feed Pipe to Adaptor At rear of Inlet Manifold (23). The I removed the Hose From Rear Return Pipe to the Front Return Pipe (32). I cut the large drain pipe from the firewall just to the left of the LH firewallmounting stud. The pipe was very hard and brittle.  freed the Feed Pipe from Inlet Manifold toHeater (22) from the spring retaining clip on the firewall and removed the pipe from the car. I alsofreed the Rear Return Pipe, On Scuttle, At Rear of Cylinder Block (31) but could not remove it fromthe car until I had lifted the Heater Case Assembly away.

Top Heater Hose Connection

Top Heater Hose Connection

Top Heater Hose Connection

Top Heater Hose Connection

Heater Pipe

Heater Pipe

Heater Pipe

Heater Pipe

I then disconnected the rev counter wiring leads from the Lucas tags on the A.C. generator situated at the rear end of the RH camshaft cover. The brown/black wire was to the front of the car, with the Green/black wire to the rear. The cable lead from the battery to the solenoid was removed.

Starter Solenoid Wiring

Starter Solenoid Wiring

Wiring Harness Firewall Clip

Wiring Harness Firewall Clip

Cooling Fan

I removed the four bolts securing the fan to the water pump pulley and removed the fan and the fan belt. The fan has a balance piece attached to it.

It was a stretch to reach the starter cable from the solenoid to the starter, so I simply detached the cable at the solenoid and left it connected to the starter. In the image below, the cable is on the rear (LH) post.

Fan with balancer

Fan with balancer

Starter Solenoid Wiring

Starter Solenoid Wiring

To finish the day’s work, I disconnected the flexible hose between hydraulic pipes for the clutch. After loosening it slides out of the bracket at the rear of the cylinder block.

 

Leave a Reply