Cylinder Head Temp Sensor Replacement Lessons Learned

[ausgezeichnet]

I just go done replacing my old single wire cylinder head temp sensor with the new two wire sensor on my 84 Carrera. My main source of information came from the Pelican tech article http://www.pelicanparts.com/techarticles/911_cyl_head_temp_sensor/911_cyl_head_temp_sensor.htm and the the thread posted by Clark Griswald titled "Head Temerature Sensor Replacement" Head Temperature Sensor Replacement

Hear are some things I had to discover on my own.

1. Grommet removal! After an hour of pulling and a few bloody knuckles, I finally got it out by taking an exacto knife and slicing as deep as I could into the grommet making a square around each of the three wires in the grommet. I then pushed, yes, pushed the grommet though to the other side and slid it up on the wires as far as I could. I then went in from the engine side, reached to the back of the engine and slid the grommet up to were I could more precisely cut it away from the wires. This slice and push method took not more than 5 minutes! Since the replacement sensor came with a new grommet there was no reason to save the old one.

2. Replacement Part Number is 93060691500. Pelican Part number H-606-915-00. The picture on Pelicans site is incorrect but the part itself is correct. The correct picture of the part is in Clark Griswald's post.

3. The old single wire has a 13mm thread. The new 2-wire head has a 14 millimeter

4. The process of cutting a grove lengthwise in a 14 mm deep socket went much faster when I mounted a metal cutting blade on my miter saw.

5. I had to remove the large black hard plastic tube that is part of the air conditioning to get to the connector bracket on the left side of the engine compartment and the "C" clamp noted below.

6. About 8 inches on the sensor side of the wire is a soft metal "C" clam that keeps all three wires bundled. The "C" is closed by a 10mm bolt. I had to flatten the "C" to make room to get a socket on the bolt.

7. You need to apply a little pressure to force the male connector thought the bracket so it sticks out far enough on the other side to connect the female connector.

8. Applying a silicone lubricant on both of the new grommets make the grommets slip in very easily.

[wente]

I just did mine a few weeks ago. Was able to use a standard screwdriver in the engine compartment to just push the old grommet out... couldn't actually see the grommet, but could feel it behind the intake when following the wires. was very easy... then silicone to get the new one in....
Ell