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Basic Engine Building DVD - Chapter 28: Honing
And finally we come to the main part of the machine shops job, honing the cylinder walls. It will do two things. First it will bring the cylinder walls to the matching diameter of the new pistons. Second it will leave a cross hatch pattern of light scratches, to keep oil on the walls and prevent metal on metal scraping. A dial bore gauge is used to bring it to the exact spec needed within 1/10,000th of an inch.
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Duration : 0:1:28
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June 22nd, 2009 at 5:27 am
yeah honing is …
yeah honing is needed. Boring is the rough cut of the cylinder and honing is done after boring to hone out the bore smooth it out in other words.
June 22nd, 2009 at 5:27 am
Do a Google search …
Do a Google search for:
UTI or Lincoln Tech
June 22nd, 2009 at 5:27 am
whats a good …
whats a good college in the usa for engine building? i want to get into the engine building feild but not just be another poor mechanic, maby get into stock car or drag racing? just give me some schools that would be of good interest for this, oh, and maby also help me get a job after im out of school. thanks!
June 22nd, 2009 at 5:27 am
This is a short …
This is a short clip taken from a 3 1/2 hour instructional video…
There is an entire chapter about how the block is bored out and this is part of the subsequent chapter that shows how the rough surface left by the boring machine is smoothed by the honing machine.
The machine here does not bore the cylinder, it’s a completely different process done by a machine who’s only job is to make the cylinders a few thousandths of an inch larger to accept new, larger pistons.
June 22nd, 2009 at 5:27 am
Hi,
I have a …
Hi,
I have a question that might seem really silly.
Say for example I have a motor and I want to used a forged piston in, say .020′ oversize, just for example.
I understand that the engine would need to be ‘bored’ to suit the new pistons. Does the honing machine as used in this video do this? I don’t know the difference between a boring machine and a honing machine or are they the same thing?
Thank you.
June 22nd, 2009 at 5:27 am
YAY! I recognise …
YAY! I recognise the name for pistons but never knew about the Kits! Great vids thank for yr reply : )
June 22nd, 2009 at 5:27 am
Mahle is a huge …
Mahle is a huge European based company that acquired Clevite Engine parts and others.
They have kits for just about every car in the world…
June 22nd, 2009 at 5:27 am
Do they just do …
Do they just do kits for American cars? (From Mark in the UK) : )
June 22nd, 2009 at 5:27 am
Boring a 4 cylinder …
Boring a 4 cylinder block would likely be less than $100 but there’s no guaranty that there won’t be other work needed. You also need to consider purchase of new pistons for the new oversized bores as well as a gasket set for the rebuild. There are complete rebuild kits available though that will have everything needed in one box.
Mahle/Clevite and Sealed Power are two major parts distributors you can look up kits with…
June 22nd, 2009 at 5:27 am
There are schools …
There are schools such as Lincoln Tech and UTI around the country but you can also contact small or large service centers or rebuild shops and see what kind of entry level jobs they might have.
June 22nd, 2009 at 5:27 am
You should check …
You should check with them…
June 22nd, 2009 at 5:27 am
what is the “about …
what is the “about cost” to get a engine bored 40. over? from a 2.5l to a 3.2l
June 22nd, 2009 at 5:27 am
I wonder if there …
I wonder if there are any classes at my University specifically for engine building.
June 22nd, 2009 at 5:27 am
so i was wondering, …
so i was wondering, where would someone like me, who has limited experience working with engines gain experience? would an auto shop teach me? or is this something you’d have to go to a technical school for?
June 22nd, 2009 at 5:27 am
the cylinders are …
the cylinders are never polished, they need the cross hatch to seat the rings for compression and stop oil blow-by
June 22nd, 2009 at 5:27 am
Our complete DVD …
Our complete DVD has some footage of the machinist installing a repair “sleeve” into a bore. The cylinder is bored out to an extreme over size and then a steel sleeve is hammered in place. This method can repair a single damaged cylinder wall, bring a rare and out of date engine block back into service and also allow someone to return a block that was bored many times back to it’s original “standard” size bore. These techniques are used for restoration or fuel economy engine builds.
June 22nd, 2009 at 5:27 am
The block and heads …
The block and heads are raw cast material but the block has steel sleeves inserted into the casting at the plant, these sleeves are melded in place and the bore and hone finalizes the sizing according to actual piston sizes.
You’ll notice at :48 to :51 seconds into the video the dial bore gauge is used at the top of the cylinder, then the bottom and back up at the top. This is reaped very often through the honing process to be accurate within a ten-thousandth of an inch…very precise.
June 22nd, 2009 at 5:27 am
i meant, cylinder …
i meant, cylinder block
June 22nd, 2009 at 5:27 am
Excuse the newbiw …
Excuse the newbiw question:
The cylinder head comes as a rough casting and is then machined right? How is the bore and hole made in the first place?
The ‘honing’ process is more of a finishing process to achieve geometric finish and tolerance in the bore, correct?
Why does the operator use the Dial gauge only on the top surface ID and not on the bottom also.
June 22nd, 2009 at 5:27 am
I’ve never known …
I’ve never known anyone that turned down free help…
that’s exactly how I got most of my first jobs years ago.
June 22nd, 2009 at 5:27 am
I wonder if machine …
I wonder if machine shops like this allow interns; basically people who will work for free for the experience.
June 22nd, 2009 at 5:27 am
1 inch =25.4 mm
1 inch =25.4 mm
June 22nd, 2009 at 5:27 am
inch? what that …
inch? what that means? i only know millimeters
June 22nd, 2009 at 5:27 am
You’d be surprised, …
You’d be surprised, a good sized machine shop does a lot of engines every day and can offer a great price for package deals. Often it will include stripping down components, cleaning refurbishing and sometimes embly, for an all inclusive fee that would be cheaper than if you did them separately.
June 22nd, 2009 at 5:27 am
I BET THIS AINT …
I BET THIS AINT CHEAP