I'm having problems please help. I have a 85 f250 4x4 6.9 idi. I've pulled the engine and taken the engine apart to an extent. Here's where I'm having troubles, I cannot get the harmonic balancer off to save my life. I've tried a harmonic balancer puller and bent all the bolts in the process. (Threads in crank are still good) I've tried a slide hammer and had to stop because I didn't want to break the engine stand and or make the block fall out. Any help/advice would be greatly appreciated! Thanks in advance, Ryan

 

Have you tried any penetrating oil like KROIL, or PB blaster> Hydraulic fluid is OK too.

 

As a last resort, you may sacrifice the pulley assy, but have you tried heat?

 

I will try all of that, block is covered in oil, grease, dirt from years of leaking, and previous owners doing nothing about it. I need to pull crank to bore block, worst case scenario would heat mess with crank or block by warping it?

 

Have used that method in the past. Just heated the pulley portion that is around the crank and not the crankshaft itself. It did take a combination of heat and a good puller to break it loose.