Pressure relief valve tool?

Pcrog027 · Posted: Thu Nov 21, 2013 4:44 am Post subject: Pressure relief valve tool?

I have what appears to be a leaky pressure relief valve. I'm trying to tighten it but don't have a flathead big enough or any tool proper to tighten or back off the plug. What do you guys use for this job?

murdoch44 · Samba Member Joined: January 06, 2004 Posts: 62

I took an inexpensive wood chisel and ground the end flat and the sides in so it would fit the slotted head. Then used an adjustable wrench to tighten/ loosen. At some point I'll weld it to an old socket, which will make things even easier.

bignick · Posted: Thu Nov 21, 2013 8:11 am Post subject:

look for brake adjusting tools. They look like a small funny shaped crowbar. Find one that has a flat end on it about the same size and give it hell. They are usually the right size with a right angle bend for added leverage. Its all I've ever used.
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79SuperVert · Posted: Thu Nov 21, 2013 8:20 am Post subject:

CIP1 and Drivewerks sell this kind of tool, but I've never used one:

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busdaddy · Posted: Thu Nov 21, 2013 8:29 am Post subject:

That's handy for extracting a stuck plunger but the OP is after the giant slot screwdriver required to remove the cap.
I reground a cheapo large cold chisel from Harbor freight, notice the bottom of the slot in the plug is radiused as well so shape the tip of whatever you use to fit.
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SGKent · Posted: Thu Nov 21, 2013 8:33 am Post subject:

make sure you use a new copper crush ring when you put it back on.

Glenn · Posted: Thu Nov 21, 2013 8:39 am Post subject:

You need a "drag link" socket to get it out.

When you do get it out, replace it with this:
http://www.cbperformance.com/ProductDetails.asp?ProductCode=040-115-431

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79SuperVert · Posted: Thu Nov 21, 2013 1:33 pm Post subject:

kreemoweet · Posted: Thu Nov 21, 2013 6:22 pm Post subject:

Why would VW design such a part? Who the hell has a "drag link socket" in their toolbox, anyway? Was that a European thing?
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busdaddy · Posted: Thu Nov 21, 2013 7:19 pm Post subject:

Before modern cars with mass produced ball joints almost everything had ajustable ball and screw joints, later on (in the 50's I think) only the drag link still included that never really wears out because it's adjustable or repairable part.

As for the availability of the tool not only did most corner service stations have a drag link tool back then the dealers all had the full compliment of required VW specialty tools hanging on the shop wall. It's much like push in spouts for metal oil cans today, everyone had a few 30 years ago but try to get your hands on one today in a panic.
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Desertbusman · Posted: Thu Nov 21, 2013 9:46 pm Post subject:

Wildthings · Samba Member Joined: March 13, 2005 Posts: 50351

A sufficiently large flat washer from you local hardware store and some grinding will quickly make a tool that will fit the slot while a pair of vise-grips or other pliers will turn it.

Pcrog027 · Posted: Fri Nov 22, 2013 5:51 pm Post subject:

This is all beautiful knowledge. So there is suppose to be a crush washer under this plug?

Desertbusman · Posted: Fri Nov 22, 2013 6:21 pm Post subject:

highlandmurf · Posted: Sat Nov 23, 2013 6:00 pm Post subject:

I believe Sears screwdrivers are still made square in section along their length, makes it easy to get a wrench on them.

The crush washers seem to be a hard to find item. I just reused my old one and put some Teflon tape on to take care of the drip.
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WilliamA · Posted: Mon Nov 25, 2013 4:24 pm Post subject:

Those of us who have both a drag link socket and a dwell meter in our toolboxes and know how to use them are technically called "old". lol. I use a drag link socket on the end of an impact driver for the job. The impact driver (the hammer type. Not to be confused with the gun type) also works well for the nut that holds the oil filler neck on. Both of these flat-tip nuts go by various names depending upon the amount of time spent getting them loose. The impact driver "almost" always works...
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busdaddy · Posted: Mon Nov 25, 2013 4:59 pm Post subject:

Wildthings · Samba Member Joined: March 13, 2005 Posts: 50351

heimlich · Posted: Sun May 21, 2017 8:16 pm Post subject:

Does anyone have another source for these? CB performance doesn't have any of the plugs. Jbugs has a hex head one but I like the internal Hex head that Glenn posted.

For the drag link tool, will any size drag link one fit?

I found this one on amazon with these dimensions:
3/8-inch Drive Drag Link Socket
11/16-inch Size
1/8-inch Tip width

Wildthings · Samba Member Joined: March 13, 2005 Posts: 50351


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