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Author Topic: how do i remove cylinder sleeves  (Read 14493 times)

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snoop

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how do i remove cylinder sleeves
« on: April 16, 2007, 03:05:22 PM »
I think I need to replace 2 of my cylinder sleeves,  how do i remove them? What are those seals for around them also?
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Offline Gordon

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Re: how do i remove cylinder sleeves
« Reply #1 on: April 16, 2007, 03:10:49 PM »
Just curious...  Why do they need replacing, and why only two of them?
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snoop

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Re: how do i remove cylinder sleeves
« Reply #2 on: April 16, 2007, 03:17:47 PM »
the engine was sitting outside for years without 2 sparkplugs.  there is some pitting but I dont know how deep. btw I didnt leave the engine like that.
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Offline Sam Green Racing

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Re: how do i remove cylinder sleeves
« Reply #3 on: April 16, 2007, 03:23:52 PM »
Snoop, on top of the piston it should tell you what size they are.
If the are STD or .25 you would perhaps only need a rebore.

Best thing to do is, get them to a machine shop that does boreing and get them to measure them.

They will then tell you what needs to be done.

What bike is it for ?

Sam. ;)
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Offline number13

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Re: how do i remove cylinder sleeves
« Reply #4 on: April 16, 2007, 03:37:36 PM »
...and to answer your question, the sleeves
should be pressed out at a shop. Whoever
replaces the sleeves for you will handle the removal
as part of the job. You can remove them yourself, but it ain't easy.
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Offline FunJimmy

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Re: how do i remove cylinder sleeves
« Reply #5 on: April 16, 2007, 03:53:45 PM »

I was told by a good friend and motorcycle mechanic that just pressing out cylinder sleeves can and will often pull aluminum with them.
This will make the new sleeves fit looser when reinstalled.
He suggests heating the cylinder block to 350 degrees F in the oven, turn it over, and the sleeves will just drop out.

My guess is the heat avenue and a little persuasion from your press would be the bees knees!

Jimmy

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Offline bwaller

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Re: how do i remove cylinder sleeves
« Reply #6 on: April 16, 2007, 04:09:52 PM »
If you've got a gas BBQ, preheat to 350, support the cylinder block upside down on something that will allow the sleeves to pop out. They will after about 15 minutes. On the re-install have the replacements in the freezer a while before,and use some caution that the sleeve doesn't "drop in" too abruptly and crack the top flange. It's wise to have the gasket surface milled slightly afterwards.

Someone here suggested the BBQ deal and I had a set to change lately, it worked slick and avoids galling the aluminum barrel pressing them out and back in.  
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snoop

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Re: how do i remove cylinder sleeves
« Reply #7 on: April 16, 2007, 04:25:58 PM »
i was thinking about a rebore, that involves new pistons and rings or just rings?  That seem a bit of money to do that.
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Offline FunJimmy

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Re: how do i remove cylinder sleeves
« Reply #8 on: April 16, 2007, 04:34:21 PM »
Cylinders cost next to nothing on Ebay.
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Offline Sam Green Racing

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Re: how do i remove cylinder sleeves
« Reply #9 on: April 16, 2007, 04:42:46 PM »
Yes but will they match the pistons that were siezed into his original block ?

Sam.
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snoop

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Re: how do i remove cylinder sleeves
« Reply #10 on: April 16, 2007, 06:01:26 PM »
pistons are standard. I wasnt sure new pistons were needed.
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Offline hymodyne

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Re: how do i remove cylinder sleeves
« Reply #11 on: April 17, 2007, 06:29:54 PM »
do a check of wear against specs in the manual and increase piston size and ring selection accordingly.

I used two small bricks to prop up a set of juggs in the grill.old sleeves slid right out. I had the machine shop press the new ones in, bore and hone new sleeves.

hym
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Online bryanj

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Re: how do i remove cylinder sleeves
« Reply #12 on: April 18, 2007, 07:14:59 AM »
If you change a sleeve it will need reboring anyway! rebore means new pistons and rings
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Offline silver fox

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Re: how do i remove cylinder sleeves
« Reply #13 on: April 18, 2007, 10:29:00 AM »
Hi there Snoop
I had to change one on my 400, soaked it in penetrating oil, then heated round it with blowtorch, and a couple of sharp taps with a plastic mallet, and bingo out she came! Couldn't believe how easy it came out! And the new one went in just as easily, just make sure you get the flats on the top lip lined up prior to re installing.

Good Luck
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Offline Kamal

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Re: how do i remove cylinder sleeves
« Reply #14 on: April 18, 2007, 10:49:41 AM »
I would hesitate to refresh two bores and leave the other two old.  For one, I'm sure you'd get some imbalance and vobration as two of your cylinders would be running strong, and two would be...not as strong.  As well, all the work you'' have to do to get a mediocre rebuild just begs for you to freshen up the two other bores.

If you are on a budget, try to find a cylinder with matching pistons on ebay, that came out of a running motor, or at least that were known to be ok. Just inspect, and toss them in...that motor will run for a long time to come.

Otherwise, you are talking a few hundred bucks to get a used cylinder, a set of pistons, and the machine work.

My 76 K6 is on about 70,000 original miles, and I still manage to beat the hell out of that thing.  Quite a motor they built.

Kamal
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Offline dpen

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Re: how do i remove cylinder sleeves
« Reply #15 on: April 19, 2007, 04:27:41 AM »
If you don't want to leave your liners in the freezer for days to shrink them here's a trick we use in the truck trade

Metal bucket, half fill with dry ice & fill with metho

put liner in bucket for five minutes and it'll slide into the block like a dick into a shirtsleeve

WEAR THICK RUBBER GLOVES OTHERWISE THE TIPS OF YOUR FINGERS WILL BREAK OFF (NOT KIDDING!!)
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