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Discussion Forum

Old Sleeves and New Pistons

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Jon

08-14-2002 19:59:23




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Does anyone have thoughts on putting new pistons and rings in old sleeves? I reamed out the cylinder ridges on my AC WD-45 and removed the pistons tonight and am wondering if I wouldn't be better off putting in new rings and pistons, rather than just new rings as I had originally planned. I really had bad plug fouling before. I would still like to use the old sleeves. Any thoughts?

Thanks, Jon

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Jon

08-23-2002 06:13:03




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 Re: Old Sleeves and New Pistons in reply to Jon, 08-14-2002 19:59:23  
Thanks for your input guys, I've decided to replace the whole lot, sleeves and pistons, since I'm into it this far. I just didn't feel real good about the shape of the sleeves. I ended up pulling them from above with a homemade sleeve puller made from a round of 3/4 in. plywood attached to a long cast eye bolt (the uncast ones, only bent and formed, kept straightening), and attached it to a hand winch fastened to an overhead beam. I then poured dry ice in the cylinders and started winching, and hoping I wouldn't pull down the old corn crib I was in. It was an adventure that lasted 2 days, mostly because I started with the wrong eyebolts. So now I am anxoiusly awaiting my sleeve assemblies. Thanks again.

Jon

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John Ne.

08-18-2002 20:53:17




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 Re: Old Sleeves and New Pistons in reply to Jon, 08-14-2002 19:59:23  
Use a long feeler gauge to go down beside the ringless piston, to measure wear, or get someone with a set of Inside Micrometers to check it against specs, also measure the piston diameter, guessing at this will only cost money and give unsatisfactory results. Also should check sleeves with a cylinder taper gauge, because sleeves always wear more at the top where the heat and highest friction is. if its eating that much oil, how are the valve guides? John in Ne.

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Salvage Man

08-16-2002 07:07:28




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 Re: Old Sleeves and New Pistons in reply to Jon, 08-14-2002 19:59:23  
By the time you buy the pistons and the rings you will have spent as much as sleeve's and pistons. Also the sleeves are very easy to pull on you WD45.



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RobertTX

08-15-2002 07:24:10




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 Re: Old Sleeves and New Pistons in reply to Jon, 08-14-2002 19:59:23  
A good way to tell how much wear your sleeve has is to get a new ring and push it about halfway down inside the sleeve. Use a piston to push it with so it will be square in the bore. Measure the end gap in the ring with a feeler gauge and compare to the spec in your service manual. Out of spec is usually OK in these old engines, this will tell you how far out of spec you are. You can move the ring up and down the bore to check for taper. This is a good indicator, but not exact because the ring will not fit into any out of round or scored areas, just remember how you are measuring as you evaluate results.

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Do;n Young

08-14-2002 22:38:34




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 Re: Old Sleeves and New Pistons in reply to Jon, 08-14-2002 19:59:23  
I believe the general idea is that if the pistons are so badly worn they need replacement, it is poor economy to not replace the sleeves as they are probably also badly worn. Nothing must be replaced just for the sake of new versus old, it is just a matter of cost versus length of future satisfactory service and future parts and labor costs.



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