I’ve had some challenges over the years however none like this. If it wasn’t for going in 69 Mach 1 I’d given up by now. The engine is a stroked 94 351 Windsor with the reverse rotating water pump (shorter). Not good in my app so am wanting to swap out the timing chain cover and pump to old school.

I’ve tried hammering the head, applied a good amount of heat around bolt washer, used 1/2” snap on impact, 110 impact as well as 4ft cheater bar. No go.

Any help be greatly appreciated. Fords 🙈

There's always penetrating oil and heat cycles. Assuming it's rusted in, heat is the only thing that can quickly break the rust bonds. Penetrating oil can work wonders if you have the time.

Worst case you may be able to grind off the head of the bolt, remove cyl head and have better access to apply heat and more bolt to grip if the bolt head rounds off.

Edit: thought it said head bolt. Disregard last paragraph.

is it a head bolt or a water pump bolt?water pump bolts like to corrode themselves in there really good.break the bolt off and deal with whats left.most likely,heat and welding nuts to it ,to get it out.

For years I restored old British sports cars, mainly MGs and Triumphs...and know well the frustration you are going through. I remember well the WEEKS, yes, weeks...I spent replacing the rear end of a TR-6 that had seen far too many salty roads. Heat cycles and PB Blaster along with an impact gun were what worked there...but it can be DAMNED aggravating, for sure.

Thanks guys. I’ve tried a lot of heat but can do
more. (used yellow tank). Just didn’t wanna wreck crank seal in which case I can’t get out. It is the harmonic balancer bolt I’m dealing with. Never dealt with such a stubborn bolt. I’m not giving up though.

Could it be left-hand -thread?

GEt the biggest and heaviest impact socket you can. Learned this back in the honda days. Thought I was being joked around. Nope. Tool companies actually then made these extremely big bulky sockets just for those honda crank pully bolts.Yes, learned i learned something from the fart can guys. Imagine that. Lololol

I once had to use a breaker against the concrete floor and engage starter for a quick second on an explorer (exploder) to get it’s harmonic balancer bolt out. Customer car. I was nervous as hell but it worked. Lolololol

I’m sure you don’t want to hear this but, maybe when balancer got pulled off before, puller was not used correctly and threads on end of crank are messed up. Bolt then got jammed home with impact on reinstall and now you’re screwed. I’m assuming someone other than you had it apart before.

done the same on many duramax’s. Wrench against the frame and bump the starter.

On my D-max, had to use a giant 3/4" breaker bar. Luckily it came loose. Starter trick was my backup plan..