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In my infinite wisdom I decided it would be a good idea to replace CPS while the engine was out, but it turns out the plastic housing was more brittle than i thought. Is the part you can just see behind the flywheel the sensor itself or does it sit inside a cylindrical housing which is part of the bell housing? It still wont budge with some gentle levering so thought I'd better check before I approach it more " enthusiastically" after letting it soak overnight in Acetone/ATF
Happened to me but engine was in the car. I'd do as Sean suggested, also looks like there is some blue loctite around the hole. I used liberal amounts of penetrating oil an a needle nose lock plyers over a week and one night it broke free.
get a set of vice grips pull the center pin out of the sensor (this is a magnet).
then get a big screwdriver and mallet and hit the sensor on the inside of the bell housing.
This should break it loose
The reason the sensor gets stuck its either from corrosion or from the block getting too hot this melts the sensor into place.
Yes loctite was fitted to the screw . Of course the hex bolt was rounded before I even started so had to use an extractor which meant cutting the plastic around the screw to get the extractor on (also tried slotting the screw without success).
Day 2 and still no success tried Mrmerlins suggestion of extracting the magnet however the magnet itself is very brittle and shatters when I try to grip it. Will keep trying to oil/lever it over the next week or so while I continue the stripping down process and if no luck my plan "c" is to remove the flywheel and hammer it out.
This should be a service item (at least remove and refit) every time the engine is out. If the sensor had failed with the engine in the car it would have been an even worse nightmare!
well I finally managed to pull the magnet by levering from below until I had about 5mm showing then attaching vice grips and pulling. The housing still refused to move so I cut it, split it and drifted it out through the bottom, It took a lot of force as it was completely fused to the engine and I ended up damaging the housing surround. Luckily it doesnt look structural so I should be able to reattach the broken piece with JB Weld. Thanks to everyone for your suggestions and support.
clean that up,
fit the new sensor then use some JB weld to adhere the broken pieces ,let it cure .
NOTE coat the sensor with grease prior to installing
NOTE use blue tape to hold the pieces in place til the epoxy sets up
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extracting broken crank position sensor
