Questions tagged [machining]
The machining tag has no usage guidance.
13
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What is crankshaft grinding and why is it done?
I saw a lot of YouTube videos referring to crankshaft grinding, while watching videos about working on crankshafts. I don't understand what crankshaft grinding does.
If we grind a crankshaft, then ...
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What size hole should be drilled for an individual tap?
The other day while doing further work on my son's Subaru, I drilled a hole in a piece of angle iron then started using my 1/4-20 tap to cut some threads in the hole. The idea was to have a threaded ...
- 140k
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Machinist Straight Edge Tolerance
I want to purchase a straight edge which I can use to measure the flatness of heads & blocks and other such nifty things. My question is, what is considered a good tolerance for a straight edge? ...
- 140k
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How are crankshaft crankpin journals ground?
In looking at this question:
What is crankshaft grinding and why is it done?
@Pᴀᴜʟsᴛᴇʀ2 gave an excellent answer that got me thinking. First, lets include the same picture from that answer so we're ...
- 9,286
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Rotor replacement, one or both?
I work at an independent auto repair shop and we seem to have 2 schools of thought, first thought, Mechanic A, one rotor under spec's, the other rotor on the same axle is machinable, replace only the ...
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Which is longer lasting HSS-E or HSS coated wth TiN?
I'm just gonna purchase taps and dies for my most commonly used metric screws. I want them to last for as long as they can (not that they will be used so often, I just want them like that). I also ...
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Just the straight facts; nothing edgy
In this question I asked about tolerances for straight edges. For this I have a followup question about length.
If I want to purchase a straight edge, I only want to purchase one straight edge which ...
- 140k
3
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2
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Removing a welded nut
There's a nut welded on my countershaft and I don't like that.
How do I remove it while minimizing the chance of damage to the countershaft's threads, as damage would necessitate:
a. welding a nut ...
- 185
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4
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Is there a hack to repairing a seized engine?
Last week I drove on the interstate for about 1 mile when my engine died. the oil light never came on but it was low on oil and a couple thousand miles overdue for an oil change. I had it towed to a ...
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1
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Improperly installed valve guides
I am new at doing cylinder head work and accidentally installed 4 pre spiraled valve guides upside down, can I hammer them back out and reinstall them correctly or do I need to use new ones?
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Prepping freshly machined block for building
I'm building an engine from the ground up to swap into my project car. The aluminium block has been re-lined with ductile iron sleeves so the machinist sprayed them with white grease to prevent ...
- 223
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3
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Best way to fix (or hack) a warped exhaust manifold?
The front exhaust manifold on my 2002 Ford Escape is warped. The problem is the catalytic converter is integrated into the exhaust manifold so a new one is like $800 and you can't get them at either ...
- 403
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2
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830
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Why facing the head block?
I have recently came across a problem. One of the rocker fingers (the one that touches the valve stems, and have cam rollers) on my diesel engine head has broken. This resulted in the pistons hitting ...
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