Extracting a broken CPS

[Jkersh]

Today I went to replace my Crankshaft Position Sensors to troubleshoot some engine problems (M20B27). When I got underneath I noticed one was missing the bolt to hold it in but was still extremely snug.

While trying to remove that particular CPS I noticed it would rotate 360 degrees but would not come out what so ever. In the end the plastic broke off virtually flush. Bits of plastic are exposed around the edges, but it is mainly the metal.

Any tips on extracting the broken sensor?

[bloodshot-e30]

urs is in the bell housing?

[george graves]

Dremel? Drill? Drill a hole and get a big hardware store wood bolt in there? That and some vice grips should do the job.

[Jkersh]

@bloodshot its back by the housing driver side, not in. Sorry bout that.

@George Thanks, thats what I figured wasn't sure if there was any other methods or tricks

[ak-]

Idk what you're talking about exactly, but I stripped my cps before. So I took a dremel to it and made a new horizontal line to suit a flathead.

[lennon]

IIRC, taking off that flywheel cover exposes everything. should make it easier, atleast to clean up.

[Jkersh]

I mad a horizontal cut for a flathead, but no luck. The sensor will turn 360 but still wont even come out 1mm... I ended up getting a set of ViseGrips around the metal part sticking out. I pulled and the magnetic piece came out leaving me with the plastic/oring/aluminum housing still stuck inside.



I was able to get this threaded in pretty good but still no luck. Damn plastic wont move at all.

I suppose I may need to try the flywheel cover idea...

Any other suggestions on getting this puppy out? The other CPS came out fine

[george graves]

heat? Plastic + heat = win?

[Jkersh]

plastic + metal stuck inside..

[george graves]

Hmmm. Ok. Motor swap.

Just kidding. Sorry, I can't see what you're working with. You can always drop the tranny.

[Jkersh]

heres what it looks like up close....

Right is the "good" CPS..
Left is the obvious... I was able to take out the metal magnetic insert in the middle leaving me with the plastic,o-ring, and aluminum housing stuck inside with a void inside... roughly the size of a M10 bolt

[george graves]

If it was me? I'd heat that bitch up and get it out. If you're left with a metal sleeve - I bet it will be aluminium. Very easy to dremel or hacksaw-blade out. Cut a groove in it and then get a chisel under an edge.

At some point you either just need to attack it, or cut your losses and drop the tranny.

[Brandon12V]

Buy an oversized bolt and large spacer(1/2") to thread in the cps. you can stack spacers together if can't find one thick enough. makes sure the bolt(with the spacer) will go into the cps far enough to become flush but won't hit the crank. next, cut a rectangular piece of 1/4" steel(you can get a small sheet at lowes or home depot) three times the diameter of the cps. you will need to drill holes on either side of it to put bolts through. Once you have two holes of equal distance on either side, drill a hole in the center of the steel sheet big enough to put the cps bolt through that I metiond in the first sentence.

Slide the cps bolt through the center hole of the steel FIRST, then the spacer, and thread it into the cps as snug as possible. Next, put two long bolts(4-5") through the side holes & thread a nut on the backside of the steel sheet. now this next part is important.

The side bolts will need to be long enough to hit the housing for leverage. I HIGHLY suggest you place something underneath the bolts(thick towel, rubber, wood, etc.) to cushion the pressure from possibly cracking your housing.

Now, holding the bolts against the housing, thread the nuts on until they meet the back of the steel sheet. Alternate from side to side to distribute pressure evenly on the CPS. the two bolts pressing against the housing will create the leverage you need to back the CPS out. In a worst case scenario, only the plastic inside will come out. in that case, just take a pair of pliers and remove the aluminum left over.

This is basic McGuyver Puller 101. If you have any questions, feel free to pm me. it sound like a more complicated process when typed out, but it quite simplistic in design. I was just trying to be as descriptive as possible. Hope this helps, good luck.

[lennon]

man... take that flywheel cover off. takes 2 seconds. i don't remember exactly if it would make this easier for you, but why not have a look?