Crank shaft pulley center bolt

[dispatchrobb]

Ok, '89 B2 2.9L Manual.

I was trying to take the center bolt out of the Crank Pulley, and sheared off the head. I currently have the pulleys off so now there is a 3 inch length of bolt sticking out and I cannot for the life of me turn this thing. I have put a pipe wrench on it and it will not turn. I just spin the engine with the pipe wrench and drive it over the wheel blocks. The threads appear to be a normal thread but for some reason would it be reverse threads? And if there is some suggestion to get this bolt out I'm all ears.

It's been rebuilt so I really don't wanna have to replace the crank. Or if someone wants the engine and swap me a 302 I might be mad enough at this one to be interested haha.

Thanks.

 

[brinker88]

Honestly, your best bet is to drill it out

 

[Bachelor-house]

Before drilling it out, I'd use heat. Or weld something onto the bolt to turn it.

 

[RonD]

No, not reverse threads, lefty-loosy, righty-tighty, lol.

Someone may have cross-threaded it last time.

If the threads aren't to buggered up from the pipe wrench you could double nut the 3" threads that are showing.
Heating up the crankshaft expands the metal, then blast the bolt with some compressed air to cool it, that can give you just enough to loosen the bolt.
Or it will break it off at the end of the crank and then you can drill it.

I like to use reverse drill bits, they don't cost that much and by drilling in reverse you can loosen the bolt while you drill, I have had more than a few broken bolts just unscrew using the reverse drill bit, constant vibration in the direction to loosen always helps.
Use lots of oil when drilling metal, heat of drilling expands the bolt making it tighter, oil keeps it cool and keeps the drill bit sharp.

Set the E-brake so truck won't roll when crank is rotated.

 

[Andy D]

I would heat the bolt in case heavy duty duty lock tite was used on the threads. Welding a nut on would heat the bolt . Double nutting would work if you can thread them on, provided you can find nuts to fit. IF an air impact wrench was used , the threads may be boogered . Good luck, please post a follow up.

 

[PanamaExpat]

Make sure when you are heating you use an acetylene set up...Propane just don't get hot enough. Weld a nut onto the end before you start. Try taking it out after you weld on the nut...The heat from doing the welding may just be enough to get er done