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Old 08-11-2011, 04:17 PM   #1
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machine work $

So I took my block, head, oil pan, and valve cover to machine shop. Asked guy to bore 30 over, do valve job, and clean everything in his acid washer. He said a rough estimate of around $1000.00 for this. I was expecting more like $400 or so. Is that crazy high, or was I just thinking it would be super cheap.

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Old 08-11-2011, 04:22 PM   #2
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Machining is not cheap. I've never done engine work but I've been a machinist for a quarter century. If I had to guess he'll spend 10 to 12 hours doing all that. That works out to just under a hundred an hour. Not sure what the rates in your area are but around here (So Cal) that's not bad.

You can prolly shop around and get a better price, but I think you're dreaming if you're expecting $400.00 for all that.

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Old 08-11-2011, 08:32 PM   #3
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I didn't factor in the valve job with my original 400 thought, just thought 1000 was high. With rebuild kit and doing it myself its about 7 of 8 hundred less than buying a new motor with a warranty. Guess I will keep going at this point. Damn jeep....... Thanks.
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Old 08-11-2011, 09:16 PM   #4
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I know the machinist I use charges 10 bucks a cylinder to bore and hone, as long as you bring him a clean block. If you want him to tank the block its another 300, decking the block is 100, want it honed with a torque plate add 50 to 100 bucks depending on if he already has plate or has to make one, head rebuild 10-20 dollars a valve. typically by the time I pick up my parts I'm in to it for anywhere for 650 to 1200 bucks just for machine work. My 390 stroker for my 79 CJ cost me 1500 in machine work but it had some extra massaging done to the block and heads to clear the crank and fit the valve springs one the spring seats.
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Old 08-12-2011, 05:29 AM   #5
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I think that $1000 is a little high, if you are talking about a 4.0. also depends on what kind of vale job you are having done just a 3 angle grind or is he going to go into head and do a port and polish. I build SBC's and my local shops charge $60 to clean a bear head (not hard to tear it down) 3 angle valve job $90-100, V8 bore and hone about $350-400 with cleaning and new cam bearing. IMO i would shop around also would be helpful to know where you are located. He may be the only game in town so he has a hold on what he can charge. Good luck
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Old 08-12-2011, 07:09 AM   #6
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Yeah, there isn't many options unless I wanna drive a while. I already had everything torn down except valves and springs. The guy is supposed to clean everything up first. I may be able to skip the bore and just have cylinders honed. That will save a little.
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Old 08-12-2011, 02:49 PM   #7
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i wouldn't do that if you are not going to bore it out then honing it wont do anything but take off a little to much metal. then you are going to have some piston slap. If you want to do a over haul and use the same pistons if they are good and the cylinders are still round. get a ball hone and a little oil and a new set of rings. I think that would be the best bet. did you already have the new .030 over pistons? or was he going to get them for you. if he was just going to do a .030 over w/o the pistons find a new shop. good luck
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Old 08-12-2011, 04:36 PM   #8
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I know a guy that would do a valve job for 50 bucks, I think for all that work you're looking I'm the 700 dollar range without new pistons, a thousand seems steep, 400 seems low, but shop around a little bit. If he's the only game in town he can (and apparently does) charge a little more. Just don't go cheap do what you want while its apart so you aren't mad at yourself in six months, and have to tear it down all over again. Good luck
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Old 08-12-2011, 06:17 PM   #9
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Was gonna do a master rebuild kit. But leaning more tward stroker kit at this point. Couldn't reuse pistons if I wanted. #6 pretty much welded ring into itself and looks like someone used it as demolition hammer. Prob gonna bore 30 maybe 60. Will be running 4.7 if I go 60 over. has kinda affordable options for this kind of stuff. Plus those guys know a lot about this particular project. I will have machinists do as little as possible since I think he may be a little high. Mainly I just want everything cleaned up.

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