FREE SHIPPING IN US Repro Valve Adjust Tool set, 2 piecesClick here to purchase or contact the seller of this item on eBay |
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| Current Price: 185.07 USD |
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Made in California from heat treated chromoly, these wrenches have a lifetime warranty against damage.
They are used for setting the M14-P or Housai valve clearances and are a faithful reproduction of the factory tools, except they don’t break.
The large boss on the end of the screwdriver’s handle has a slot for levering open or closed the rocker cover wire loop - and that square hole in the long handle of the socket wrench has nothing to do with adjusting valves, but is for the square vent plug on the cast-in drain passages in the nose reduction case (that take oil to the Governor).
If you examine the forged Russian socket wrench, you’ll see just below the handle joint, they needed to grind away a little material (without which it won’t snap snugly inside the flange of the rocker gallery and directly onto the adjusting locknut). We missed this on earlier production runs - so our apologies to past TYC valve adjust tool customers who needed to introduce that feature with their own grinder.
Even with our best initial efforts, TYC products only get better through continuous improvement and we welcome all product improvement suggestions from customers.
Regular monitoring of valve clearances is time well spent to keep your radial’s power output high.
With practice you’ll surprise yourself how efficiently you can complete this task. ( Ask the Antonov AN-2 owners…no wire loops there, instead there are six nuts on each of the Shvetsov’s rocker covers.)
On the M14, remove the front plugs and start on the number 1 cylinder. ( number 1 cylinder is at 12 o’ clock with cylinder numbers increasing clockwise.) Visually check both magneto switches are in the off position, remove the #1 inlet rocker cover and, with a thumb over the plug hole, turn the prop in the forward direction until you feel pressure building. You’ve found the compression stroke, now find top dead center either visually with a screwdriver down the plug hole (sitting on the top of the piston) or by using the factory tool.
At the compression stroke with the piston @ TDC, both intake and exhaust Valves are closed with the hope of losing minimum combustion gases on the power stroke. But that’s with hot motor and you’re measuring a cold one. The design people have worked out the distance the valve train expands to make the gap zero at operating temperature- that’s the feeler gauge you’re going to need. (.012” or .3mm)
For inlet & exhaust it’s the same value. .2mm clearance is not enough and .45mm is too much. So feeler gauges are an important part of this operation - but not included.
Use the wrench to undo the hex nut 1/2 to 1 turn or until the adjustment screw moves easily.
Insert the .3mm feeler gauge between the roller on the rocker arm and the stem of the valve.
As you turn the blade screwdriver tool to adjust play in the mechanism, the feeler gauge is moved in the gap at the other end of the rocker until the right 'feel' is achieved.
If you can't slide it around with finger and thumb, use the screwdriver to back off the adjustment screw a tiny amount.
Once you like how you have set the tension on the feeler gauge, hold the screwdriver in position and tighten the hex adjustment nut with the wrench. That long lever is there for a reason - torque the nut tight and it won't loosen. All these valve and wrench materials are hardened, you can't hurt them.
Once set, check that the feeler gauge moves with the same freedom/resistance that it did before. Often people apply downward force with the flat blade without realizing, then when the force is removed to check the clearance, it feels tighter than you wanted.
Remove the feeler gauge and close this rocker cover and move to the other valve for this cylinder.
The firing sequence for the M14-P motor is 1-3-5-7-9-2-4-6-8. So to do the least amount of prop turning, repeat the clearance checks on number 3 cylinder next, then 5 and so on.
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Click here to purchase or contact the seller of this item on eBay