Cam Position Sensor Removal

[KJL]

I need to replace the cam position sensor seal on my 92 ZR1. Looks challenging to get to......any tips or tricks to gaining access before I just start removing stuff? I just had my master brake cylinder out and kick myself for not replacing it then. It would have allowed for a little more access.

[Jagdpanzer]

Remove the 6mm cap screw that retains the cam sensor to the the cylinder head. Twist the sensor back and forth a few times while prying the retaining tab out with a screwdriver. Be prepared to catch a few ounces of oil when the seal pops clear.


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[KJL]

I removed a few things including the inner fender skirt sections and the ASR bracket and pulled the hoses off of what is called the electric diverter valve. It was all quite easy and gives me plenty of room to get my fat hands on the sensor. Waiting on the new seal to arrive any day now. Given all the hoses, brackets, wire harness and components, there was no way for me to get my hand on it.

[Jetjock]

Originally Posted by Jagdpanzer

Remove the 6mm cap screw that retains the cam sensor to the the cylinder head. Twist the sensor back and forth a few times while prying the retaining tab out with a screwdriver. Be prepared to catch a few ounces of oil when the seal pops clear.


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A few ounces of oil? I had half of quart of oil come out. It looked like the Exxon Valdez in my garage!

[G8nightman]

Make sure the leak is not the sensor itself I ordered a seal too then found a hair line crack in sensor itself


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[KJL]

Originally Posted by G8nightman

Make sure the leak is not the sensor itself I ordered a seal too then found a hair line crack in sensor itself


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Good point, I will give the sensor a close inspection.

[KJL]

Update: Sensor is cracked. Starts on top and travels down the side. I think it stops just short of the seal. There is mold seam there as well which makes it harder to verify where the crack stops and the seam starts. I need to get a closer look with a jewelers loupe.

As luck would have it I ordered a new one from Phil but if I can, I would like to try and repair the crack if possible. The sensor still works. Any thoughts? Super glue? Epoxy? RTV? How much clearance between the sensor and the cam?


Only a little oil cam out when I removed it.

[32valvZ]

Originally Posted by KJL

Update: Sensor is cracked. Starts on top and travels down the side. I think it stops just short of the seal. There is mold seam there as well which makes it harder to verify where the crack stops and the seam starts. I need to get a closer look with a jewelers loupe.

As luck would have it I ordered a new one from Phil but if I can, I would like to try and repair the crack if possible. The sensor still works. Any thoughts? Super glue? Epoxy? RTV? How much clearance between the sensor and the cam?


Only a little oil cam out when I removed it.

Honestly, I wouldnt use anything to try to fix that crack... you wouldnt want RTV or any kind of epoxy floating around in the oil galleys and I doubt super glue would hold. Its now an official paper weight.

[KJL]

Originally Posted by 32valvZ

Honestly, I wouldnt use anything to try to fix that crack... you wouldnt want RTV or any kind of epoxy floating around in the oil galleys and I doubt super glue would hold. Its now an official paper weight.

Yes but..... it?s not like I can just run to NAPA and replace it. It still works. The leak was minor. The oil pan gasket leaks much more. It seems a little super glue in the crack with a skim of high temp silicone would be worth a try. Epoxy may be an overkill and more risky. My guess the sensor itself is bedded in epoxy internally and should be fine even with a crack in the outer shell. The crack is barely visible.

[Erik]

Originally Posted by KJL

Update: Sensor is cracked. Starts on top and travels down the side. I think it stops just short of the seal. There is mold seam there as well which makes it harder to verify where the crack stops and the seam starts. I need to get a closer look with a jewelers loupe.

As luck would have it I ordered a new one from Phil but if I can, I would like to try and repair the crack if possible. The sensor still works. Any thoughts? Super glue? Epoxy? RTV? How much clearance between the sensor and the cam?


Only a little oil cam out when I removed it.

Phil has cam position sensors?