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  #1  
Old 08-20-2007, 02:54 AM
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Pictorial - Make valve adjustment wrenches

So I got a new to me 1980 300SD and I've been doing maintenance that has probably not been done in a while - and its time for valve adjustment.

You will need a set of special wrenches that allow you to tighten and un-tighten the valve clearance adjustment nuts. You have two choices in obtaining these wrenches. You can buy them ($$) or buy regular wrenches and modify them yourself ($). Follow along as I show you an easy and quick way to modify a set of plain wrenches.



- Start off with two 14mm wrenches, these happen to be long handle wrenches from Harbor Freight. I got two sets of metric wrenches for $10 each, so now I have a set of metric wrenches and valve adjustment wrenches.



- Find a place where you can get some good leverage on the head of the wrench, this just happens to be the tow hitch on the back of the Jeep.



- I used a pipe to get a little extra leverage and to concentrate the bend near the head (very important).



- Apply heat at the point where your trying to bend and it will eventually be pretty easy to bend, just go slow. Inexpensive wrenches seem like they would bend easier than Craftsman, plus if you mess up, your not out a lot of money.



- Depending on the thickness of the wrenches, you may need to grind down the face a little. I only had to grind the bottom face of the bottom wrench.



- Now do this twice and you will have your set of valve adjustment wrenches.



- As a bonus, you get to see what happens if you don't use heat! Lesson? USE HEAT!

Good luck, and leave a message if you find these pictorials helpful.

Happy Wrenching!
Mick
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  #2  
Old 08-20-2007, 04:32 AM
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I was going to try to find some valve adjustment wrenches tomorrow and ran across this thread. If I don't have a torch, couldn't I just put a match to a nozzle of WD-40 and spray for awhile? JK, I'm going to try your method on the regular 14 mm wrenches I bought thinking that they'd work unbent. Do you think a camp stove would provide enough heat?
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  #3  
Old 08-20-2007, 07:30 AM
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Thanks for the great post. I have been meaning to do this same job.Now all I need is a couple wrenches. Thanks for the great pictures. Tom 82 300D
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  #4  
Old 08-20-2007, 08:30 AM
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Thumbs up

I've tried multiple pairs of home brew units, none work as well as the Hazet.
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  #5  
Old 08-20-2007, 09:46 AM
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Nicely done!
Thanks
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  #6  
Old 08-20-2007, 10:44 AM
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Cool.
Good thread. Ill have to remember this
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  #7  
Old 08-20-2007, 12:00 PM
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Miklas, I don't think a camp stove would put out enough concentrated heat. It sounds like you already have propane, all you need is the torch nozzle that attaches to your camp stove propane source. This will make it much easier to bend. You can pick up the torch nozzle from a hardware store in the plumbing section for around $10.

Mick
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  #8  
Old 08-20-2007, 12:14 PM
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OH great, now I have to buy a Jeep just to bend the wrenches. Also
it`s 40 miles to Harbor Freight in Salinas.

I guess I lucked out a couple yrs ago, I got a set off E-Bay along with
4 other Hazet wrenches for $50. hate to think what that would cost new.

would Mapp gas work better than Propane? I think it has more BTU.

Charlie
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  #9  
Old 08-20-2007, 06:03 PM
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MAPP is hotter; worked better for me.

Got two cheapo wrenches at Sears; was $4 each, but they were having a 50% off sale, so that made them $2 each. Used a bench vise, the MAPP torch and a pipe cheater bar.

Slightly better is to bend each wrench twice into a flat "Z", like the Hazlet photos. For ease of use, try to bend the second one about 6mm back at each break. This will allow the finished pair to "nest" one into the other with the open ends perfectly aligned...(OK, so I was lucky it just came out that way!)

On my 85's I did not need to do any grinding to match the lower lock nut thickness.
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  #10  
Old 08-20-2007, 08:39 PM
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I made some, pictures are posted here somewhere. vThe big thing is as FRANKNBENZ said , make them so they nest and one can pass over the other that way you can turn them a lot easier.
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  #11  
Old 08-20-2007, 09:19 PM
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Great stuff here! Thanks!
I love this forum!
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  #12  
Old 08-21-2007, 09:34 AM
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I got thin wrenches at Northern for about $4.00 each.
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  #13  
Old 08-21-2007, 11:18 AM
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Would it be better to make the bend of the top wrench as close to the head as possible?
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  #14  
Old 08-21-2007, 01:40 PM
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I put some dimentions in this post. It might help some one. Just remember they don't have to be fancy as long as they work.
Home made Valve adjustment wrench info
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  #15  
Old 08-21-2007, 02:08 PM
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nice iMac Box...
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|1983 300D| OM617 239k Miles|Red|"Passion"|
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