The Stovebolt Site Forums The Shop Area General Truck Talk what tool to open the wiper vac pump??

Getting ready to put in a different wiper pump, and I'd like to open the new one up and make sure it's lubed and in good shape, but I've never seen a wrench that would fit the oval tits on those screws. I can probably use a small vice grip, but what's the "real" tool, and where do you get them, or at least a socket bit to use with my stuff? And, what are they called?

If you're talking about clutch head screws, you can get those at NAPA.

Showme, How about HarborFreight check this out,Its cheap less then $10.00 for those clutch head screws and other screws you might need help on.

http://www.harborfreight.com/100-pc-security-bit-set-with-case-68457.html

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Steve

They aren't clutch heads. The heads are oval extrusions. I have no idea why they made a special (expensive) screw on these. I use pliers. I have yet to encounter one that wouldn't come right out. They don't seem to be marred by the pliers either.
Carl

They are not clutch head screws. I have never seen a tool for them.

...pic...

Maybe some mini needle nose?
I've never takeen one apart
A few members here have, hopefully they will chime in soon.

Yeah, I've got a set of clutch head sockets, but they're made for the concave "figure 8" bolt and screw heads. I've never seen one, unless it can be taken out by the fork looking bits that Steve D linked me to. I can use a pair of pliers, and sooner or later I'm going to switch to electric, but my truck came with the pump in it and 2 more in the spare parts boxes that came with it. Just figured I'd get one if there was actually such a tool. But if everyone else just uses vice grips or pliers, I will too. Still kinda like to know what the hell their called, though! (nothing worse than going into a tool store and trying to explain what you want only to sound like a babbling idiot. "Well, it's got this little oval doohickey, and it sticks up and..."

That's called a "Double D" screw head, and the only place I've seen something similar is the metering rod limit screw on an electronic control Quadrajet carburetor. A good friend machinist can make a T-handled tool for them with a piece of round stock and a correct-sized 4-flute end mill in a Brideport mill. The machine shop next door to my shop at the high school where I taught made me several Quadrajet adjusters that way. If you can get one screw out and mail it to me, I'll make you a tool.
Jerry

I was a bit perplexed when I when to rebuild the wiper motor.
I took a short piece of tubing and flattened the sides a bit on one end and put a little "T" handle on the other end.
Worked great.
I've seen a lot of proprietary fasteners on antiques, but that was new to me.

Hard to imagine what the guys in the engineering and design departments were thinking when they came up with that idea. Thanks for the info, guys! I don't think I'll be taking too many of these apart, but thanks for the offer, Jerry, and the actual name of these things. I suddenly feel a little less ignorant than before!

I did the same as Jim Sears; flattened a piece of tubing till it fit snug over the weird head only I epoxied the other end into a 3 inch piece of broom handle to make it a screwdriver clone. Been using for 40 years and do have to re-flatten a tad when the fit gets sloppy.

Or....take an old bolt and drill it out, flatten it with a
hammer till it fits. That way you can use a nut driver
as a handle:
http://www.pbase.com/dennygraham/image/141586823
dg