05 JGC 5.7 CPS bolt LOST! - Jeep Garage - Jeep Forum

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Old 10-03-2014, 08:16 PM
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05 JGC 5.7 CPS bolt LOST!

I have lost the bolt that holds the CRANK shaft position sensor. Please for the love of god help me locate one locally.

2005 Jeep Grand Cherokee Limited 5.7
NUMBER 3


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Old 10-03-2014, 08:35 PM
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11 mm hex head
1/4-20
3/4 inch thread body

The stock one has a washer that is loose but doesn't come off, but you can use a normal washer, just stick a little circle of thin cardboard like from a cereal box on the end of the sensor so it lines up right and doesn't hit the crank when you tighten the screw back up


Most hardware stores will have something you can use, or a Fastenal store
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Old 10-03-2014, 08:37 PM
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Re: 05 JGC 5.7 CPS bolt LOST!

I don't get the cardboard part. I don't just put the new one in, put the bolt in and torque to 21ft lbs?
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Old 10-03-2014, 09:09 PM
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Normally you would just torque n go because the stock bolt is spaced properly to begin with, if that makes sense. But a normal bolt from the hardware isn't, so you have to make sure it is spaced properly so the end of the sensor doesn't get hit when you start the engine.
You had to do the cardboard thing with the cps on older Jeeps, too. You used to be able to buy pre cut cardboard circles, even, as ridiculous as that sounds!
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Old 10-03-2014, 09:57 PM
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Re: 05 JGC 5.7 CPS bolt LOST!

SO 1 washer wouldn't do it correctly?
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Old 10-03-2014, 11:11 PM
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Think of the cardboard as a disposable spacer that makes the correct gap between the sensor and the flywheel. Upon startup, the cardboard will get knocked away but leave your sensor untouched, to avoid this-

http://farm8.staticflickr.com/7017/6...9cae5404cb.jpg
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Old 10-04-2014, 05:54 AM
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Re: 05 JGC 5.7 CPS bolt LOST!

Quote:
Originally Posted by sanjuro77 View Post
Think of the cardboard as a disposable spacer that makes the correct gap between the sensor and the flywheel. Upon startup, the cardboard will get knocked away but leave your sensor untouched, to avoid this-

http://farm8.staticflickr.com/7017/6...9cae5404cb.jpg
Eventhough this story is true for the 4.0 on the XJ/ZJ/WJ, this shim is not used on 3.7/4.7 nor 5.7.
The 4.0 has an adjustable crank sensor, where the depth is adjusted with this shim on the sensor nose. There is no adjustment for the crank sensor on the 3.7/4.7/5.7 engines. They must be put in flush with the engine block and the mounting bolt tightened to 21 ft lbs.
By the way, did you loose the bolt when changing the sensor? Look around well, because you never know where a loose bolt will end up (and could cause damage)
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Old 10-04-2014, 06:50 AM
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Quote:
Originally Posted by Frango100 View Post

Eventhough this story is true for the 4.0 on the XJ/ZJ/WJ, this shim is not used on 3.7/4.7 nor 5.7.
The 4.0 has an adjustable crank sensor, where the depth is adjusted with this shim on the sensor nose. There is no adjustment for the crank sensor on the 3.7/4.7/5.7 engines. They must be put in flush with the engine block and the mounting bolt tightened to 21 ft lbs.
By the way, did you loose the bolt when changing the sensor? Look around well, because you never know where a loose bolt will end up (and could cause damage)
This is normally true because the factory bolt lines it up, in the absence of the factory bolt, i.e. using a slightly different hardware store bolt, the cardboard will ensure proper placement, and certainly won't hurt anything.
This is also why I previously mentioned it was a technique used in older Jeeps.
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Old 10-04-2014, 11:12 AM
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Re: 05 JGC 5.7 CPS bolt LOST!

No idea what you mean with" lines it up"? The sensor just fits in a hole and sits flush on the engine. The bolt will hold it in place. Paper shim will do absolutely nothing good here, standard bolt or not. The sensor can simply not touch the target wheel, because it fits flush on the engine.
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Old 10-04-2014, 04:26 PM
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Re: 05 JGC 5.7 CPS bolt LOST!

Yeah our focus should have been where the hell do you find this bolt.

11 MM HEX Head
1/4 - 20
3/4 thread

No where to be found local.
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Old 10-04-2014, 05:42 PM
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Re: 05 JGC 5.7 CPS bolt LOST!

Is that even the correct size?
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Old 10-04-2014, 06:03 PM
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Re: 05 JGC 5.7 CPS bolt LOST!

No idea what size bolt it should be. Donư you have any bolts at home to try? If you have found the right size thread, it should not be that difficult to find a bolt that will do the job.
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