Main Menu

1987 911 Installing Cylinder Head Temperature Sensor


Vehicle Information: Model: 911 Carrera; Year: 1987; Body Type: Coupe; Engine (type, size, modifications): 3.2 L; Total Mileage: 145,000;

My 1987 911 has been intermittently hard to start. The starter turns fine but sometimes the engine does not catch on the first try. Sometimes when it does catch it seems like I have had to crank the starter longer than I should have to. I have replaced both of the flywheel sensors (the insulation fell off in my hand) and the DME relay, but I still have this problem. My car has a one-wire cylinder head temperature sensor.Based on the other posts I have decided to replace the cylinder head temperature sensor. I have a couple of questions about doing this. 1) The Bentley Service Manual says to lightly coat the threads of the sensor with Molykote HTP. I take it that Molykote HTP is some sort of high-temperature, anti-seize, anti-corrosive compound. Is that correct? I have been unable to find it for sale. Is something like Lubromoly Anti-Seize LM508 as decent substitute? If not, what commonly available compound would you recommend? Or do people skip this step? Or perhaps the sensor will come pre-coated? 2) Regarding the rubber gasket with slots in it for the flywheel sensors (installs between the engine compartment and transmission area): is there some trick to installing it? I had to remove the gasket (which was not easy) when I replaced the flywheel sensors and lying on my back I could not get it back in place at that time. Please share your technique. Thanks.

You must log in to view answers associated with technical questions. Join PCA to participate in our community.
No votes yet