Finishing up the engine tear down on the 993. It needed to be in an uber on its way to LN Engineering by 3pm. Still needed to get stripped the rest of the way, the rest of the studs out, the case split and everything cleaned up. Was able to execute it while the one of the other techs finished stripping the tub. (Which got done too).
First up head studs - I used to struggle with these before I found the “recipe”, now it’s less than 10 minutes per side. Including pulling the circling and jugs.

The key here is get some heat in every hole working quickly. Then while it’s still hot spray some Wurth HHS into the hole, let them all sit for 3-4 minutes. Then start getting after it.
I set myself up a little production line here. The 3/8 black gun on the left is set to reverse (it is the strongest cordless one I have) and the green one is set to forward. That way I can save a few seconds as well as momentum in movements not having to switch directions on the gun.
I use the green gun to spin down the CJ500 collet till there is enough engagement
Then I use an 1 1/8 wrench to hold the collet, slap the bolt home with my 3/8 air. Use the wrench to break the stud loose a 1/2 turn, back in a 1/4 turn, then back out an 1/8 turn. This helps break the loctite loose and get it moving.
Then I use the 3/8 gun set to reverse, I basically clutch drop it

and slam it on the collect while it is spinning to get the thing moving. Comes right out. Then back to the 3/8 air to undo the collet
Then back to the 3/8 electric to remove the stud from the collet. I know that sounds like a lot, but when you have almost 100 studs to remove it takes an hour and half vs all day.
Then it was on to the fan. These can be an absolute B**** to remove. Service data says to remove the alternator from the housing. Place it on a block of wood and hit it with another block of wood. Can’t make that up lol. It is MAG so it is super fragile (hence the wood I guess? I use an air hammer instead.
use a little map gas on the bearing after you have cleaned the shaft up. Then I take the air hammer with a straight punch and hit the side of the bearing (this part is steel and gets replaced). I only do it at full soft setting of the hammers just using the vibration on the lowest setting to get it moving while I pull on it. Works like a champ every single time.
All that is left is to clean….