2019 POTD Thread Archive

It looks like the set screw can be accessed be rotating the tool holder past the area of the top plate if I’m seeing correctly

You are correct, A2V. I didn't see that.
 
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Today i got back home pass midnight but i made the effort to make the final pieces so i can get the valves adjusted on the little Niva, i made the main plate for holding the dial indicator some time back, but i need couple of special fasteners to clamp it down to the cam cage. I started with 12mm piece of 4140 steel, which is overkill but is was only peace i had in that size, i used my die holder to thread the outside with M12x1,25 then i drill the inside and threaded bit for M8. Then i cut a flat spot at the end so i can cut a slot to use a screwdriver to screw them down, i made 3 pieces like this, then i started on the nuts, i drill the threaded a piece of 28mm cold rolled with M12x1,25. Then i used my fine knurling tool to make the nuts easy go turn, and parted them off, and finally i face them on my bench grinder this took couple of hours but i'm happy how they turn out.
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Wow, wow my head's spinning now, i just went to test fit the valve lash testing plat on the Little Niva, and tested 2 valves and this even surprised me, factory clarence ia 0,15mm on all valves, i got 0,7mm on one and 1,05 mm on the other, now my thought is how is this engine running, and it showed factory compression on all cylinders and how worn is the cam and lifters to have almost 1 millimeter more clearance, any thoughts ?
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I made a little rack for my high tension hacksaws to sit in the top of a Kennedy 520 yesterday. It's just a piece of wire closet shelf from Home Depot (left over from putting shelves up in the house) bent on my 24" Di-Acro finger brake.

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All of my hacksaw blades reside in one of the drawers below.

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Wow, wow my head's spinning now, i just went to test fit the valve lash testing plat on the Little Niva, and tested 2 valves and this even surprised me, factory clarence ia 0,15mm on all valves, i got 0,7mm on one and 1,05 mm on the other, now my thought is how is this engine running, and it showed factory compression on all cylinders and how worn is the cam and lifters to have almost 1 millimeter more clearance, any thoughts ?
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Are they lifters or tappets? Lifters here are hydraulic and are self adjusting over a limited range. Tappets need to be set at the proper clearance. An engine with 1mm clearance on tappets should still run but it would be noisy.
 
It's an overhead cam. If you have a larger gap than spec, you will still have compression, but you will lose power from decreased lift and decreased duration. Engine will sound loud in the top end, and it is hard on your components. Usually, the valvetrain parts are very hard steel, and not prone to wear. Who knows what the Soviets were doing with their production and design... just look for damage on the cam lobes, lash screws, rockers, and valve stems.
 
Wow, wow my head's spinning now, i just went to test fit the valve lash testing plat on the Little Niva, and tested 2 valves and this even surprised me, factory clarence ia 0,15mm on all valves, i got 0,7mm on one and 1,05 mm on the other, now my thought is how is this engine running, and it showed factory compression on all cylinders and how worn is the cam and lifters to have almost 1 millimeter more clearance, any thoughts ?

Take a close look at the threads on the adjusters and lock nuts to make sure they aren't stripped or galled. Mike
 
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