Serious question, has anyone else had success with a heat gun on a stubborn injector?

I was working on a 6.0 Powerstroke in a shop in Boise last week, and the number 8 injector was absolutely seized. I tried the usual puller and penetrant for an hour with no luck. On a hunch, I borrowed a buddy's Milwaukee heat gun and applied steady, focused heat to the injector body for about three minutes. It came free with a normal puller on the next try, no damage to the bore. What other tricks have you all used for this specific problem?

3 comments

3 Comments

the_nina2mo ago

That three-minute heat cycle is a solid data point. I've seen guys torch the whole valley and still have issues. Did you check the injector bore for any warping after it cooled down?

tyler6142mo agoOG Member

Yeah I did check the bore with a straight edge. It looked fine, but I'm not totally convinced. What's the best way to measure for slight warping you can't see?

cameron76318h ago

Oh man @tyler614, you gotta get a feeler gauge set and a precision straight edge, the machinist kind not the hardware store junk! Lay it across the bore in three different spots and check for any gap. If you see light through a 0.002" feeler, that head is cooked. I've caught warping that way on a 6.0 that looked dead flat to the eye. Don't trust just looking at it, that little gap will mess up your fire ring seal every time.