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12-07-2017, 03:02 PM | #1 |
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Location: Marana, AZ.
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Sleeves Needed Here?
You guys already answered my questions about the pitted deck surface. What do you think about these two cylinders?
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12-07-2017, 03:10 PM | #2 |
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Re: Sleeves Needed Here?
Not sure how deep those pits are, but those score marks look deep enough to warrant repair.
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12-07-2017, 03:24 PM | #3 |
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Re: Sleeves Needed Here?
What's the current bore and what bore are you going to? You would have to measure the depth of the grooves and then double that. That would be the required overbore. And then determine if the block would take that overbore. If not, you would have to consider a sleeve.
If the grooves are .030 deep, it would require a min of .060 overbore to clean it up. And .040 deep then a .080 overbore, etc. |
12-07-2017, 03:53 PM | #4 | |
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Re: Sleeves Needed Here?
Quote:
It can also be accomplished with a conventional boring bar setup but not as easy! Thanks, Gary in N.Y. P.S. The statement mentioned above about measuring the "depth" of the gouge is how it's done. You start at that point! It's also going to come down to how much oversize you want to bore it, the gouge depth MAY be moot point??
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12-07-2017, 06:22 PM | #5 |
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Re: Sleeves Needed Here?
Sorry guys, I know you need more info. The best I can get in there and measure, the first pic is the deepest @ .025"-.030". The wider one is roughly .010" at deepest point. It is standard bore.
If I end up using this block I was considering going 3.312" bore. My truck is still running so maybe my current block is OK. I "MAY" have a crack in exhaust port. Slight dry trail down from cracked exhaust manifold. Condensation I hope. I won't know until I tear it down. I was thinking as rusty as the bores are, the pistons were beat out of it. The wider gouge almost looks flame cut though. |
12-07-2017, 06:34 PM | #6 |
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Re: Sleeves Needed Here?
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12-07-2017, 06:52 PM | #7 |
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Re: Sleeves Needed Here?
I haven't paid for this block yet. I have pressure checked it. I fabbed up block off plates and put tank valves on them. Pumped up with bike tire pump. I did it with water in jackets and with air alone. No leaks I could find. I dye checked for cracks. Found one tiny crack starting. Has not been to a machine shop yet.
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12-07-2017, 06:56 PM | #8 |
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Re: Sleeves Needed Here?
I just included a couple images. I checked the entire engine. Nothing found at pan rails, cylinders, ports or anywhere cracks typically form.
I may be able to have a buddy Mag it where he works. Gary, I wish we had a really good machine shop in Tucson. I may have to go out of town for my machine work. |
12-07-2017, 09:05 PM | #9 |
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Re: Sleeves Needed Here?
Sounds like you just need to go .060 or .080. If there's nothing locally, several shops in Albuquerque that would find that a routine job.
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12-07-2017, 09:27 PM | #10 |
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Re: Sleeves Needed Here?
I am not certain how it works but if you bore those worst cylinders to the biggest oversize you can and they do not clean up then you just keep going to the sleeve size, wrong? Do you bore differently for a sleeve than an over sized piston?
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12-07-2017, 10:13 PM | #11 |
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Re: Sleeves Needed Here?
Ross, you haven't steered me wrong yet. If I don't find a good shop in Phoenix, I may be making a 7 hour or so trip when I'm ready for my machine work.
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12-07-2017, 10:54 PM | #12 |
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Re: Sleeves Needed Here?
You might check with these guys, I saw favorable words about their flathead work:
Morrison Auto Machine 5434 W Glendale Ave. Glendale AZ 85301 623-937-4705
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12-07-2017, 11:36 PM | #13 |
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Re: Sleeves Needed Here?
Thanks Ross! I'll have to check them out.
You're going to have to tell me how you built your engine so I can build mine faster. |
12-08-2017, 01:22 AM | #14 | |
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Re: Sleeves Needed Here?
Quote:
Offset with a normal boring bar is easy just stick a piece of shim stock with the size you want the offset between the centering paw and cylinder wall. |
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12-08-2017, 11:24 AM | #15 |
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Re: Sleeves Needed Here?
When machining for sleeve, a lot of shops leave a step at the bottom so the sleeve won't try to move. If the bore job goes through the wall of the cylinder then the step would have to be there in my way of thinking since there is less to hold the sleeve. I'd prefer to sleeve the bore than offset the cylinder center. There have been more than a few 221 blocks bored & sleeved for 3 3/16" pistons. If you use a standard size sleeve, they usually go through the cylinder walls. JB weld has been successfully used to install the sleeves.
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12-09-2017, 03:34 PM | #16 |
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Re: Sleeves Needed Here?
Sure seems that your block needs a lot of work, might b easier to find another .
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12-09-2017, 06:04 PM | #17 |
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Re: Sleeves Needed Here?
It came as a package deal with a fresh Merc .010/.010 crank and rods. I have a running engine I'm planning on rebuilding.
The seller let me take it free until I check it out. Said if it's junk toss it. It's not great but, it's not junk. He did lower the price. |
12-09-2017, 09:08 PM | #18 |
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Re: Sleeves Needed Here?
If you're going to 3.312, those marks aren't going to be an issue. The little crack you showed is totally typical and of no worry at all. Some of us have seen cracks in that specific place so many times, that we claim Ford had a part number for it! LOL
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12-10-2017, 02:16 AM | #19 |
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Re: Sleeves Needed Here?
I appreciate all the feed back and expert advice. I have seen some of the blocks you guys "fix" on this forum. This one didn't seen nearly as bad as some.
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