Last week, I played mechanic and had to replace an oil pan gasket on our
99 Ford Taurus with 160k+ miles. This required the removal of the exhaust pipes from the manifold flanges. Anyone who's attempted this knows how rusty and brittle those manifold stud bolts and nuts can get. I've heard nightmare stories about them snapping, or cracking the manifold casting, etc.Of course, on mine, the nuts were rusted half off and practically welded to the studs. After spraying with penetrating oil and letting sit, these things were just not moving, because they were rounded over and undersized from the rust.
So I picked up a set of these Irwin Bolt Extractors:
The 12mm stud bolts were long and actually too thick to fit through the hole in the bolt extractor, so I thought I had wasted my money. Then I decided to try something. The heads on these studs are actually rectangular.
I had another 12mm head starter motor bolt that was rounded off and the proper sized Irwin extractor took it off like it was a wingnut.
Next, I had a couple 6mm machine screws (that hold the oil pan) with sheared off heads. You've all seen these on the TV infomercials...
I was skeptical, but the Grabit worked perfectly and took them both out without doing any damage to anything other than what it removed.
So two thumbs up for both of these products. WELL worth the money.