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So, I've been having trouble starting my 02 - Diesel Excursion 4WD (7.3 PSD with 4R100 tranny). I get the squealing/grinding sound of a starter/flexplate with missing teeth. I replaced the starter last month due to the same issue and could see the flex plate had some worn teeth. This is a common issue on this vehicle.

I plan to replace the Flexplate this weekend, but I have to drive it at least 6 times before that. Right now it won't start. If I just put a socket on the front of the cooling fan and turn the engine over manually, will that turn the flexplate as well? I would assume so... but I'm kinda dumb on some engine internals and automatics especially.

I'm also reading thru the flexplate replacement guide for this vehicle and it mentions I should use a "flex plate worm gear" to turn the flexplate to reach all of the bolts when disconnecting it from the crank adapter. Same question - couldn't I just turn the engine crank from the front of the cooling fan with a big wrench/ratchet instead of buying some specialized tool? Seems odd that people would mention this specific tool if that was the case...

maplemale
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2 Answers2

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I never use the tool, there's never enough room to get it in there. I use a screw driver/pry bar to turn the flywheel/flexplate by the teeth. You should be able to do that once you get the cover and or starter off. And yes you can turn the flywheel/flexplate by turning the crank bolt. That will work fine to move the flywheel/flexplate to get it started, but it's easier to turn it at the flywheel/flexplate with screwdriver/pry bar when you are removing the bolts.

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Summit Racing offers a (Performance Tool Flywheel Turners W80510) for under $20. For it to work you have to have a removable cover that allows access to the bottom of the flywheel. I have a similar tool and it works well although it can get tough to turn once the cylinder pressure builds up.

mikes
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