im looking for the proper bolt or whatever it is that the 6>3>1 white wires comming outa the wiring harness are connected to. mine was apparently not grounding very well and possibly at all for one part. i have it grounded now to the only quickly accessible bolt on the throttle body.
ill have to start it up from cold to make sure its running better, but it did seem like it made a difference.

and is there an easy way to get to the head temp sensor or do you just need to pull the intake pipes?

happy 4th

morning bump

Funny...I was just looking at my CHT yesterday wondering the same thing!!
Looks to me like the intake has to come off.
I'll be watching your thread...good luck.
Mike

Was tough to get a good picture but the wires are grounded at the bolt at the rear of the motor just below the plenum.
I have an extra multi-prong connector piece if you'd like it.

I don't think you need to pull the intake. Head temp sensor is accessed thru a hole in the tin. I'm not saying it's easy to remove (!) but I think you just remove the grommet and the access is kinda like the access to a spark plug; down in there behind the tin. There are all sorts of threads about modifying a socket to allow the socket to seat on the sensor and the wire won't be damaged.

Id be interested in the multiprong adapte. How much?

Come and get it! I tried to give it to you the last time you were here.

13mm deep socket. Grind a corner off an extension to let the wire pass thru the socket, or, cut a slot in the side of the socket like that of an 02 sensor socket.

Ground connection goes on the rear most bolt on the case halves.

I couldn't get a socket in there because oof the intakes maybe I need an angle adapter to get in there.
Pooorsche did u redo those ground wires yourself? I think one is cut and not getting a connection do you knw?

Yeah, they were just temporarily put together. The '75 connection was different than the earlier style. They originally were connected to that cross piece on the passenger side air intake runners. I forget now exactly how it was. Thinking when I replaced the harness the ground wires had different end fittings.

My bad. The pic below shows a head temp sensor in a 914 2L head and one can easily see that the intake would obstruct access to the sensor.
Click to view attachment
On the other hand, the pic below shows the sensor on a Vanagon head. I guess by 1980 the mechanics strong-armed the designers to make it easier to remove the sensor The sensor is outside the cooling tin and actually used to hold the tin down!
Click to view attachment

I've changed lots of them in the car.
The intake is NOT in the way. As with everything 914, its a tight fit, but it will come out.

Ouch, my bad twice and again

Oops, sorry Jim. wasn't trying to get down on ya. Just wanted him to know it can be done. Easy, really.