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Your engine has to be miked, measured with a micrometer. It takes the rite tools,tooling,and knowledge to rebuild an engine. There are a ton of videos on this on youtube. I work at a machine shop, and we will not touch an automotive engine. It takes to many tools that can only be used for one job. 5000 of an inch is a huge difference and there is no way to see that with your necked eyes.
Fixed that for you.Your engine SHOULD be miked, measured with a micrometer.
Fixed that for you.
I build my engines with plastigauge. The motor in my truck has a faint gouge in one of the bores. The latest engine I put together didn't quite clean up with a .030" overbore; there's a tiny bit at the top of the cylinder - above where the rings go - that didn't clean up. I built a 500 Cadillac with a grooved bore, and I used an angle grinder to cut down the valve stems for a big cam. A perfectionist would say this is all garbage, but they get down the road with plenty of alacrity. I've seen "perfectly assembled" motors blow up and I've seen garbage last thousands of miles. Not to say that either is bad, you just have to decide how much time or money you're willing to invest.
The secret is knowing where you can cheat. If you want a perfectly built engine, mic everything. If you just want something that runs good, plastigauge will ensure your tolerances are "good enough". Use loctite on the fasteners that need it. If you're going big on the camshaft, check your valvetrain clearances and geometry. Know where your block plugs go. Finally, if you fire it up and it's making bad noises, shut it down and investigate. I put a .025" hole in the galley plug behind my timing chain to solve a tapping noise.
Liked for using the word "alacrity." Love me some good diction.Fixed that for you.
I build my engines with plastigauge. The motor in my truck has a faint gouge in one of the bores. The latest engine I put together didn't quite clean up with a .030" overbore; there's a tiny bit at the top of the cylinder - above where the rings go - that didn't clean up. I built a 500 Cadillac with a grooved bore, and I used an angle grinder to cut down the valve stems for a big cam. A perfectionist would say this is all garbage, but they get down the road with plenty of alacrity. I've seen "perfectly assembled" motors blow up and I've seen garbage last thousands of miles. Not to say that either is bad, you just have to decide how much time or money you're willing to invest.
The secret is knowing where you can cheat. If you want a perfectly built engine, mic everything. If you just want something that runs good, plastigauge will ensure your tolerances are "good enough". Use loctite on the fasteners that need it. If you're going big on the camshaft, check your valvetrain clearances and geometry. Know where your block plugs go. Finally, if you fire it up and it's making bad noises, shut it down and investigate. I put a .025" hole in the galley plug behind my timing chain to solve a tapping noise.