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Location of Crank Position Sensor

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Old 07-30-2005, 09:07 PM
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Default Location of Crank Position Sensor

I want to replace the crank position sensor on my 88 bonneville, but I can't find it. I have the front driver'* side wheel removed, but don't see it anywhere. Is it behind a cover? Anyone have any pictures they can post?

Thanks
Old 07-30-2005, 10:58 PM
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It'* behind the Harmonic Balancer on the passenger side. Not sure about Series 1 engines, but normally you must pull the balancer to change the semsor.

Cheers,
Old 07-31-2005, 07:46 PM
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Originally Posted by jr's3800
Originally Posted by Foghorn
It'* behind the Harmonic Balancer on the passenger side. Not sure about Series 1 engines, but normally you must pull the balancer to change the semsor.

Cheers,
Yes on the 88 Vin C 3800 the Balancer will have to be removed...
Thanks for the info so far, the page I was looking at that told me it was on the driver'* side was obviously wrong..

So now I've got a pull tool for the harmonic balancer, and a 28mm socket for the bolt on the harmonic balancer. How do I keep the crank from spinning when I am trying to unbolt it? I'm so close to having this done, but my chilton'* manual is entirely useless.
Old 07-31-2005, 10:11 PM
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Remove the cover under the torque converter/flexplate and clamp a vise-grip on the flex plate to stop the engine from turning. I have also heard of people threading a bunch of small rope in through the spark plug hole on a cylinder to stop the piston but I have never tried this. The damper should not require a puller, it is a slip fit on the crank, although it may require a good tug.
Old 07-31-2005, 11:50 PM
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You'll definantly want a puller for the balancer.....They don't just fall off with a tap of the wrist.

Also, the rope trick works...Just make sure you use twine, or rope that isn't freying or cheap and ratty that could leave a bunch of dust in the cylinder.
Old 08-01-2005, 12:05 AM
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I don't know if I like the idea of the rope trick. It would create uneven pressure on the head, valves or piston. And if you do it on a stroke with an open valve, however slightly, light bend a valve.
Old 08-01-2005, 12:08 AM
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Originally Posted by jwikoff99
I don't know if I like the idea of the rope trick. It would create uneven pressure on the head, valves or piston. And if you do it on a stroke with an open valve, however slightly, light bend a valve.
I don't think that there'* that much torque in there. Other wise if the rope trick scares you, you can get a tool that'* metal and screws into the spark plug hoe and it'* fairly long, so that way it hits the piston.

I personally don't like the vice grips on the flexplate idea....they're pretty flimsy, and if you f it up....you have to pull the motor to replace it.
Old 08-01-2005, 02:58 AM
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no no no, you guys are doing it all wrong! you gotta get one guy under the car, in the flywheel with a tire iron <has to be a strong guy too> and another one up top with a 24 inch breaker bar. that is the way to go, for both times we did it
Old 08-01-2005, 03:07 AM
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Originally Posted by rjolly87
no no no, you guys are doing it all wrong! you gotta get one guy under the car, in the flywheel with a tire iron <has to be a strong guy too> and another one up top with a 24 inch breaker bar. that is the way to go, for both times we did it
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