Any advice is welcome!

I'm replacing the timing chain on my 22RE ('91 pickup). I'm pretty sure it's never been done and there's over 200k on the engine. I've been trying to remove the crankshaft pulley bolt for a few days now and haven't been able to get it to budge.

So far, I've tried:
- putting a 24" pipe wrench with a 3 foot pipe on the end of it around an impact socket and trying to turn it
- wedging a breaker bar against the frame with the impact socket on the bolt and bumping the starter about 25 times
- heating the bolt with a Mapp torch for about 10 minutes and letting it cool
- tapping on the bolt with a 5 pound sledge repeatedly
- using a 3/8" impact wrench with 1400 ft/lbs of torque (supposedly)
- re-trying all of the above after heating and tapping the bolt

and finally

- wedging the breaker bar against the frame with the impact socket on the bolt and letting the truck roll down hill in reverse (the truck is facing backwards on the hill), then popping the clutch. All that did was bring the truck to a sudden stop. I'm tempted to let it roll farther to get more speed up and trying it again.




The marks on the pulley are from a dumb idea I had involving a 48" pipe wrench:



I've filed the ridges the pipe wrench made down so the inside surface of the pulley, where the belt sits, is smooth again.

I'm almost ready to put it all back together and take my chances with the timing chain.

 

Wow, really surprised the starter/breaker bar combo didnt work. I’d try put it in 4rth, have somebody stand on the brakes, longer pipe like a jack handle on the breaker bar.

 

Starter breaker combo always worked for me. Curious to see how it comes out!