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HARMONIC BALANCER

 

Changing the crank position sensor on a 97 GTP

15/16 Deep socket 1/2 drive
13/16 Deep socket 1/2 drive
1/2 deep socket 3/8 drive
15 mm shallow socket 3/8 drive
3/8 drive rachet
1/2 inch drive impact wrench
flat blade screwdriver
6" 3/8 extension
Harmonic ballancer puller
3 - 1/4" X 3" 28 NF (National Fine) screws for puller
Support the car safely on Jackstands and remove the passenger side tire.I used a 13/16 deepwell socket and the impact.
There are vinyl screws holding the shroud on with philips heads on them. I do not know why they have philips heads on them, I just used a small flatblade and pryed the center screw head out. Then the outer piece that the screw applies pressure to in order to hold the shroud in place just slips right out. I then removed the accessory belts and placed them to the side for inspection. As long as you are into it, you might need to replace your belts.
I tried to use my impact wrench, but it would not budge the ballancer bolt, so I used a trick I have succesfully done it the past. I took my long handle 1/2 drive and put a 15/16 socket on it, then I braced the handle against the frame and bumped the starter slightly. (CAUTION! I have never had a problem doing this, but YOU MIGHT! This could damage several things including your starter). With it loose, I removed it easily with the impact.
Next, use a Harmonic Ballancer Puller, if you don't have one, rent one from AutoZone or some other parts store. The puller requires 3 - 1/4" X 3" boltsto connect, you need to get about 1/4" of it threaded in there before you try pulling it out. I then used the impact and a 5/8 socket to turn the center shaft and pull off the ballancer.
This is a shot of the back side of the ballancer. Those teeth on the rings are what breaks the signal for the CrankShaftPosition Sensor to read properly. Inspect them for damage.
Next, remove the cover over the Crank Shaft Position Sensor. it just pulls off, with a little help from a flat blade screw driver.
This is a shot of the cover for the sensor. Inspect it for damage, because it protects the sensor from bedris getting into the system and damaging it or causing false readings.
Next, remove the 2 bolts that are holding the sensor in place. I used a 1/2" 3/8" drive deep well socket, and added a 6" extension on the bottom one to get more range for ratcheting it out.
The old one is on the right, and the new one is on the left. Next, just bolt the new one in, there is no gap alignment or anything. Then bolt the rest of your stuff back up in reverse order and you are on the road!

 

Total time was about an hour and a half for me plus I changed the oil.