I got a quote the other day for $350. It's been over 10 years since I had one done, can't remember if that's reasonable.
What does the peanut gallery think?
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Cost to bore and hone an inline six
Re: Cost to bore and hone an inline six
Sounds high to me. IIRC when I had a 89 bore M30 bored out to 92MM, it was around $200. That was back around '98 though, but I am in Sonoma County Calif which is one of the most expensive cost of living areas in the country, and I believe you're in NM which is low. My machinist charged a considerable premium, although I don't recall exactly how much, for such a large overbore. He called it a triple overbore due to being an eighth of an inch. I wouldn't call your quote an "on crack" quote, or stupid expensive, but it sounds high. Not way high, just high.turbodan wrote: Mar 22, 2025 11:52 PM I got a quote the other day for $350. It's been over 10 years since I had one done, can't remember if that's reasonable.
What does the peanut gallery think?
But... IMO the most expensive machine shop is the cheapest one. Money be damned, paying more upfront is cheaper than trying to fix or redo things later. Let alone the cursing, screaming and swearing that goes along with it.
And lets face it, all they really want to do is V8s.
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Re: Cost to bore and hone an inline six
I'd be more worried about the quality of the work than how much it will cost. The question revolves around how much time will the job take? Shop rates these days is probably going to be in the range of $125/hour; $350 will get you less than three hours, and that doesn't include any required materials or supplies. Of course you can always get a second quote from another shop.
I'm no machinist but I think machining on a straight six will require less setup time than a V8. They'll only have to position the block in their machine one time, rather than having to do four cylinders, then reposition it to do the other four.
I'm no machinist but I think machining on a straight six will require less setup time than a V8. They'll only have to position the block in their machine one time, rather than having to do four cylinders, then reposition it to do the other four.
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Re: Cost to bore and hone an inline six
i had an M10 bored 1mm over in August of 2024. i think i remember it being $100/hole just to bore + hone it. probably another $150 to set it up on the machine and have it resurfaced. client paid the shop directly or i'd have the receipt to reference.
automotive machine shop rates out here are around $200/hour, so that checks out.
automotive machine shop rates out here are around $200/hour, so that checks out.
Re: Cost to bore and hone an inline six
Sounds fair to me.
I live in Hungary, and 0.25mm over bore + honing + decking (if you are there...) would set me back roughy 150-200$ in most shops.
The average pay and the cost of everything is roughly 1/3rd of the US, so I don't think that's too bad.
I live in Hungary, and 0.25mm over bore + honing + decking (if you are there...) would set me back roughy 150-200$ in most shops.
The average pay and the cost of everything is roughly 1/3rd of the US, so I don't think that's too bad.
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Re: Cost to bore and hone an inline six
In my area (CT), that's cheap. Good machinists are getting harder and harder to find. I'd expect to pay $100/hole here.