I need to check to see if or how much the bores on a 350 I'm trying to rebuild have elongated. Where is a good place to get one for short money?
CK5
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bore gauge?
- Thread starter Chevy305
- Start date
You could use Telescoping gauges I would think. Their pretty cheap but you also have to have a mic to check the Telescoping gauge. If you want an actual Bore gauge cheap try Enco. Your going to get what you pay for though. Good brand name precision Bore gauges are freaking expensive. Your going to need a two point contact gauge so a Telescoping gauge will check that.
sled_dog
1 ton status
A good machine shop will check out what you have going for limited if any money. I mean if they are gonna end up boring it they need to know what is going on.
Yep, If your having a shop do it they will check everything. You don't need to even bother. But if you just want to check for the sake of it what I mentioned before will work.
Regular vernier calipers will measure well within 0.030" if you just want to see if it has already been overbored.
That's OK for the top of the bore...and then only sorta. Usually there is a nice step at the top of the bore on an older engine. The bore Mic is good for checking multiple places of the entire bore so not only do you get an accurate size, you can see if it's out of round at the top, middle and bottom of the bore.
Rene
Rene
I wouldn't use it to see if it needs a bore, just to check if it has already been overbored. If there is a significant ridge at the top of the bore, that would make it more difficult.
Kjunky5
1/2 ton status
Just take the block to a local machine shop. We check sizes for guys all the time... I can't speak for every shop but if it's just a quick bring it in, mic it and write down the sizes for ya' while you wait at the door we don't even charge.
Also it doesn't hurt to have a guy that mics stuff for a living taking the measurements. I can tell you from experience that just because you have the tools doesn't mean you'll measure it correctly.
When I first started I was about .003"-.005" off from the other guys. Now after a couple years I'm within .001" consistently with the head honcho machinists at the shop.
Also it doesn't hurt to have a guy that mics stuff for a living taking the measurements. I can tell you from experience that just because you have the tools doesn't mean you'll measure it correctly.
When I first started I was about .003"-.005" off from the other guys. Now after a couple years I'm within .001" consistently with the head honcho machinists at the shop.
This could not be more true. When I was 18 and built my first motor, a 396 big block, A mechanic bud let me borrow on ID mic to check the machine shops work. I had never used one before. He showed me how to use it. Went home and checked the block a dozen times and got it under size AND over size! Took to block back to the shop which was a highly recomended motor shop. He ad all Sunnen high end machines, and had been in bussiness for decades. I told him what I had been getting in each bore. He pulls out a Sunnen bore gage, drops in in the bore and they were identical to the tenth, TO THE TENTH! I humbly said thank you and went on my way. That was long before becoming a machinist.
Point taken. I am no machinist of any sort, but I do have some experience with calipers and mics. I have used a bore gauge in my diesel's class and I was able to exact the instructors numbers. Hopefully I can do that again...
