crank shaft pulley bolt


Old 01-18-04, 05:10 AM
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Exclamation crank shaft pulley bolt

I have a 98 3/4 ton chevy with the 7.4L 454. That dang bolt in the end of my crank is so tight that I'm afraid I'll snap it. Does it have reverse threads or something?
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Old 01-18-04, 06:00 AM
Join Date: Apr 2002
Location: Pittsburgh,Pa
Posts: 2,417
No reverse threads on the bolt and yes they are tight.You won't break it unless it's cross threaded,so go for it.
Old 01-20-04, 09:53 PM
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I seem to remember having a similar problem on an old Mopar 318 crankshaft bolt. Eventually I used an air impact wrench to loosen it. It worked fine. Of course I had the engine out and on a stand, making for considerably easier access. Other than that I guess it's a long cheater bar and thick padding on the downhill fender. Good luck.
Brian W.
Old 01-22-04, 07:47 AM
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What about slowly heating the bolt w/ a torch?
Old 01-23-04, 06:01 PM
Join Date: Oct 2000
Location: Livonia, Michigan
Posts: 923
NO!... Don't use a torch. There are seals and other rubber components that can get overheated and ruined.

Use either an air impact wrench, or find some creative way to stop the engine from rotating by jamming the flywheel (a technique I've used), or by removing a spark plug and stuffing rope in the cylinder (I haven't used that technique).

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