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Old 08-26-2001, 04:20 PM   #1 (permalink)
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Default Tools for valve adjustment

I have a 74 260 and will I need any special tools to adjust the valves?

Should I do anything else besides install a new valve cover gasket while I have the cover off/

Thanks, Steve
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Old 08-26-2001, 06:33 PM   #2 (permalink)
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Default Re: Tools for valve adjustment

My Haynes manual lists a "special adapter Datsun tool # ST10640001" for "correct torquing of the rocker pivot locknut" I'm not sure how crucial exact torque specs are on this locknut, but I have never used this tool. As I recall, you will need a 14mm and 17mm wrench, and a feeler gauge.. that's about it.. As for anything else, you can clean up and inspect your cam, and check out your timing chain tension while you have the cover off..

Later!
~Scott
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Old 08-26-2001, 10:02 PM   #3 (permalink)
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Default Re: Tools for valve adjustment

adjusy the valres the normal way according tothe Haynes book. Then remove the dist cap aftermarking alll the firing points. Then adjust the valves using the actual firing point. Use a 3/8" wide feeler gauge on the small end (lash cap side) and use 1.5 times the valve lash that is called for on the lobe side. Adjustment is the same but much more accurett.1 to 4 more horseoower.

w
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Old 08-26-2001, 10:10 PM   #4 (permalink)
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Default Re: Tools for valve adjustment

Motorsport Auto has this tool for $44.95. Look on page 36 in the latest Motorsport Catalog. Scott Bruning, at Ztherapy.com made one by using a socket and an open- end wrench ( I believe the open-end is 17mm). He used a torch to cut, make the proper bends and weld. He talks about and shows it in his first SU Carbs. video. I also made one in a short welding class that I took about 3 years ago, but have not used it yet, but I will fairly soon. If you have access to a welding torch, you can make one by looking at the picture on page 36. I am not sure if it is covered in the second/most recent version. Good Luck, Ernest
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Old 08-28-2001, 02:38 AM   #5 (permalink)
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Default 17 mm bent wrench tool...

extremely helpful. Believe MSA sells Snap-on tool for this... if you can find local Snap-on man... Not impossible w/ normal 17mm open end, but a lot sketchier due to poor access angle.

Recommend remote starter button and two feeler sets one open to .012 & .013 for exh & other open to .010 & .011 for intake... Go/no-go thing with tight lock-nut. Very accurate. (Be sure to deburr leading edge of feeler w/ #600 emery to avoid scratching cam lobe. Bump engine over w/ button & adjust when lobe is pointing close to straight up. Then no need to watch for timing mark. Best to set valves hot, but hard to do until you get used to it. Start first time w/ engine warm. Once you get 'em close & get used to procedure, whole thing is 30-45 minute job. Takes a bit of getting used to how much tightening lock-nut changes the gap.

Interesting comment about gapping at top of valve stem. Never heard o that before.

------ Al
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