The Central Hub for DSM Community and Information

For 1990-1999 Mitsubishi Eclipse, Eagle Talon, Plymouth Laser, and Galant VR-4 Owners. This is where the DSM platform history is documented and archived. Log in to help us in our mission, and to remove most ads from the browsing experience.

96 RS 420A - broke crank sensor off inside block - any suggestions?

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

euroticcustoms

Probationary Member
27
0
Nov 1, 2004
Clarksburg, West Virginia
hey guys, just bought a 96 RS that wouldn't run. It wasn't firing when I got it...the cam sensor was unplugged. I plugged it back in and turned it over...it took off and then died immediately (kinda like it may have been out of time).

The guy I bought it from had just had the head redone, a new head gasket, and timing belt installed, so I figured they may have got it a notch out. Well, I checked the time today...it's in. The cam sensor is new and I've tried 3 coils (2 of which I know are in working condition). New plugs/wires. Well I figured I'd try the crank sensor since I had one in a locked up '99 engine I had lying around. The known good one came out alright...no problems...had to pry a little to get the O-ring to pop out, but nothin' to it. I crawled under the '96 and take out the bolt, try turning the crank sensor back and forth, but it was stuck. I hit it with the handle of a screwdriver and it loosened up - twisted it back and forth a couple times and tried pulling it out...wouldn't come.

I put a flat screwdriver under the edge of the sensor and pried out. It looked like it popped out a little bit, but when I reached up to pull it out of the block only the piece that the wiring harness plugs into came out. There was a little bit of the sensor sticking out the block, so I tried to grab it with a pair of vice grips, but pieces just kept breaking off. I then started cutting into the plastic with the screwdriver and a hammer trying to make a notch to pry against. It just kept breaking into little pieces. I tried everything I could think of at the time using the screwdriver, to no avail.

This whole time I was using my pocket knife with a built-in flashlight for light I decided to flip the blade open and try prying on the sensor with it. I kept flaking off pieces and whittling away...got to the O-ring -- I think that was the reason it stuck in the first place...had a helluva time getting that O-ring cut out with the knife. Well, now I'm about 1/2" to 3/4" into the block (in the center of the sensor...the edges are cut down to where the O-ring groove is cut into the block)...the sensor turns pretty well, but I can't figure how to get it backed out.

I don't have much room with the axle in the way...was thinking of using an easy-out or some sort of self-tapping bolt...just don't have any room to get into it with a drill. I'm sure this is a common problem, but I couldn't find much using the search...just a couple threads about the 4G63.

I worked on a '97 Dodge Stratus with the 4G64 not too long ago..replaced the Cam and Crank sensors, but didn't have any problems...seemed to be exactly the same (and exactly the same position) as the 420A. Anyway, I'm stumped...don't want to remove the axle or pull the engine. Can I drop the oil pan and get to it? Timing cover? Can't remember.

Any suggestions or help would be appreciated.
 
Sounds like a job for the angle attachment.

Thanks for the reply and funny you should mention this. I was walking through the tool isle at the local Wally World last night and ran across the Black & Decker RCT100. The ratchet comes out of the handle and can be used in a drill...it even came with drill bits. Seemed like it would work...I'm going to give it a try as soon as the snow breaks. Thanks again for the reply.
 
drop the pan and turn the crank till you can pop it out not hard just time consumeing.

Hey Newboost, thanks for the reply. I just dropped the pan on the seized engine and checked it out...think that's the route I'm gonna go. Guess I'll have to drop the exhaust and maybe the crossmember to get to all the pan bolts...and one bracket, but I guess that'll be alright.

And for the record: the Black & Decker tool I mentioned in the above post is JUNK. It locked up within the first 30 seconds of use. Going back to wal mart this evening. I'll keep the thread updated..
 
And for the record: the Black & Decker tool I mentioned in the above post is JUNK. It locked up within the first 30 seconds of use. Going back to wal mart this evening. I'll keep the thread updated..

haha... i guess ill take mine back then... good thing i didnt open it. haha!!
 
Well, I opted to give drilling it 1 more try. Used the flexible attachment for my Dremel and a 3/16" drill bit...honed a few times in the middle of the sensor until there was a large enough hole for a 3/8" easy out. Threaded the easy out about halfway in and used a pair of small vise grips to pull it out...it got most of the sensor...had to use a 6" flat-head to rake out the rest. Some of the sensor dropped into the pan, but it should come out with a filter and oil change.

I put the new sensor in, cranked her over and she fired right up. Purrs like a kitten. Took it for a test drive, and it's apparent the car only has 48K miles. Awesome...now I can move on.

Thanks for all the replies fellaz
 
Add Value - Be Respectful - No Trolling - No Misinformation - Participate Often!
Support Vendors who Support the DSM Community

Build Thread Updates

Latest Classifieds

Back
Top