I took apart the top end of my 305 LB9 to replace the heads, and am looking for help of the various sensors and thier locations. I took all the sensors out to have the peices cleaned and some of them powder coated. Since I'm in NY, this was before Winter, and I'm finally getting it back together. I took pics before hand, but none show the sensors.

What are the 2 sensors on the front of the intake manifold above the water pump? Does it matter which hole is used for each sensor. There is also a 3rd smaller threaded hole above these 2, does anything go in it?

What about other sensors that go in the heads and block? I have the Chilton's manual, but it doesn't help much with sensor location and identification. I've looked through hundreds of posts on sensors and didn't see what I need.

Thanks,
Dan

 

The Cold Start Control and CTS are in the front coolant crossover of the intake. The CTS is on the left (driver's side) and CSC is on the right. The top center port on the front coolant crossover is the hose connection for the supply to the throttle body coolant passage.

The right cylinder head MAY have had a cooling fan switch, if the vehicle has two electric fans. The left cylinder head has a temperature sending unit for the instrument panel temperature gauge.

The right side of the block has a detonation sensor in the lower cooling jacket drain hole.

The left exhaust pipe has the oxygen sensor.

The MAF sensor is in the intake ductwork.

The MAT/IAT sensor is in underside of the intake plenum.

The oil pressure sensor is on the rear intake flange.

The TPS is on the left side of the throttle body,

The IAC stepper motor is on the underside of the throttle body.

The EGR temperature sensor is on the base of the EGR valve, under the intake plenum.

 

Perfect - Thanks Vader!