$15 Redneck Slide hammer and Prechamber adapter (Pics)

[pdrayton]

Yep, its another "I'm too cheap to spend $200 on a tool I'll use a few times.." thread. But this one has a cheap solution. I spent $15 on making my slide hammer and thread adapter to pull the precombustion chamber on a 602. It can be done on a 61x just as badly and easily. Whether you would want to or not is another question, probably best left to a psychologist to answer. But I like making stuff so I did (got to justify buying that mig welder to the wife perhaps?)



Basically what I did was make a slide hammer from a 1/2" bolt, some washers and barbell weights. The nut that goes on the bolt is welded to a 1/2" x 20 thread nut which screws onto the top of the spare injector you sacrifice to being the thread adapter. I welded the top of the spare sacrificial injector to the nut because otherwise it strips the nut's thread when you use the slide hammer. Cheap Chinese steel you know. I had the spare injector lying around from a visit to the local junkyard ($11). You could probably use jb weld to weld the stuff together and it would work just fine. All you're really doing is going from the 1/2" bolt to the injector base thread.

Here's a closeup of the bottom piece. From the right it goes - 1/2 inch bolt, 1/2" bolt nut welded to 1/2" x 20 self locking nut welded to top half of injector body screwed into bottom of injector screwed into prechamber.



You screw the welded nut concoction off the 'slide hammer' bolt and screw the injector into the prechamber. Then you screw the bolt back onto the injector and use it just like a slide hammer. I initially used 3lbs of weight, but it wasn't getting anywhere. I put on 6 lbs and the pc came out after a few good whacks.


Tools
Mig Welder (would probably work with JB Weld)


Parts:
1 x Long 1/2 inch bolt - (Lowes part number 61845)
1 x nut for long bolt - (Lowes part number 63304)
4 x Washers - (Lowes part number 68885 )

You also need a 1/2 x 20 thread nut to go on the top of the injector. The only 1/2" nuts with a 20 thread I found were self locking nuts. You'll need one of the those. 1/2" diameter, 20 thread.

6 lbs or so of barbell weights (those things that have been lying in the garage for years...)

1 spare injector top

Assemble and apply to cylinder head. Step back and bask as crowds cheer and neighbors ask for your autograph....and your wife doesn't scream because you spent more money on tools for the car...