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This is my experience with replacing the crank sensor on my 05 GPT Cruiser GT Turbo.
This is copied from an expert How to do Forum . Although it is basically correct there is some missing information and some steps out of order from my experience.
Expert below in red & my comments in blue:
The CKP sensor is mounted to the engine block near the starter.
Use the following steps to R&I the sensor: The Crankshaft Position Sensor is in the front of the engine block just under the starter motor
(1) Disconnect the negative battery cable.
(2) Raise vehicle and support. (I put on ramps and was fine laying on my back)
(3) On 2.4L SRT-4 remove the lower inner cooler hose from the metal tube.
Note: I did not remove the rubber hose as it appears to have a factory joint at the metal tube to rubber elbow connection. I just took the clamp loose that attaches to the inter-cooler and twisted out of the way. The metal tube is a pain to move but it does move. For me it was easier to twist after I took out the two bolts that hold the metal tube and power steering lines completely out. Just take it slow and use steady pressure. I would avoid yanking it to move to avoid possible damage to the rubber connection that is up higher on the back side of the engine. I also took the other two power steering lines loose and moved out of the way.
(4) Remove the Structural Collar.
Note: For me I could not get wrenches or rackets inside without hitting the fan shroud. The only alternative I came up with was to loosen the fan and try and move it up out of the way. The only way I could get it high enough was to take off the top radiator connection and the plastic insert that goes into the radiator. This required draining the coolant. I wish there was a drain to minimize the mess but I drained via the bottom hose connection. This also opened up a little more room when I pulled the bottom hose out of the way. After all this I was able to reach the bolts. (I only took out item #12 which included bolts #'s 2,3,6,7,8 from image below) It is no easy but I got in. Luckily for me (and hopefully you) the bolts will be loose once you break them loose. That made it easy to get them out by hand. Also easy to get them hand tight when going back.
(5) Unlock and disconnect the electrical connector to the crankshaft position sensor.
Note: I flipped #5 & #6 because it was easier to get to the connector once the sensor is out.
(6) Remove the crankshaft position sensor bolt.
(7) Remove the sensor.
(8) Go back in reverse order and install. It was very tricky for me to get the little bolt started since you pretty much have to do it blind. And don't forget to put coolant back in if you have to drain it.
I hope this little write up helps. If I did just these steps I think it would have been maybe 1.5-2 hours tops. I added a few steps that were not required so I am not 100% sure of time.
Hint: If you have smaller hands or smaller but long handle rackets you might be able to avoid moving the fan shroud. My 3/8" racket handle was to short but would fit. My 1/2" racket was long enough but hit the shroud. I did all this with wrenches & 1/4", 3/8" & 1/2" rackets and swivel joints helped me on a few bolts. Of course all was metric sizes.