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Discussion Starter #1
I am having problems figuring out how to use these, it seems no matter how I put them on (I have 4) I'm not able to get the piston high enough into the barrels to be able to get them off without the other too hitting on the bottom. I'm wondering if I need to cut these things in half to make them work. I hope this helps illustrate my problem:



HELP and THANKS !!!

J "not that" D
 

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You linked to a file on your computer it looks like.

You can't post pics to this forum...you have to link to pics posted else where on the net...like your own web site etc.
JohnnyB
 

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Discussion Starter #3
Yeah I figured that when I saw the way the tag but it came up on mine so I thought I was good to go. I'm going to nhis this pm for some track time so I hope to get it fixed tonight.. thanks very much for checking.

-JD

J "not that" D
 

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Are your cylinders chamford on the bottom. With my ducati I just squeeze the rings and the bottom of the barrell takes care of the rest.


Champ
 

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Every engine I've ever done (never a motorcycle engine), I've been able to slide the piston into the cyclinder from the top. I don't know if there's anyway to do that here, but it's quite easy to do.
 

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Ghetto Dude,
Piston ring compressors are designed to enable you to install the piston/rod assembly from the top of the cylinder. It is therefore neccesary to have the bottom end of the engine disassembled to facilitate installing the connecting rod(s) to the crankshaft once the top end is assembled. Hope this helps...

FR
 

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quote:
Are your cylinders chamford on the bottom. With my ducati I just squeeze the rings and the bottom of the barrell takes care of the rest.
yeah, but you've only one piston/cylinder to fiddle with. Chucklehead...
 

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Discussion Starter #11
I was told by the person who told me to buy the piston ring compressors that it was basically as simple as putting them on, sliding the barrels down from the top then slipping the compessors off. So that is what I have struggeled to do. In retrospect looking at what I'm dealing with I don't know how it would be physically possible BUT at this point it would seem just as easy to squeeze the damn things with my hands and slip the barrells down but honestly I don't know enough to know. Should I just take them to someone ? I hate not knowing how to do it myself and I hate even more I haven't been able to figure it out.



J "not that" D
 

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after seeing the photo, it explains all . . . but it's friday night, and not the time to go into an explanation. It's supposed to rain all day tomorrow, so then it'll be.
s
 

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The only problem with sliding the cylinders over the pistons is that it takes more hands and fingers than most people have to hold the rings in place while sliding the cylinders over, assuming the cylinders are cast as one unit. Sooooo, is the bottom end of the engine apart? Is the cylinder in fact a one piece casting? Do you have enough friends to come over and hold the rings in place on each piston while you hold the cylinder over them like the anvil of doom, just waiting for the right moment to whack an errant finger off...
Did you envision this scenario when you boldly yanked the afore-mentioned cylinder off?
To paraphrase others on this forum, I just used the words whack, yanked and off while I was mumbling about engines...and more hands and fingers too.

FR
 

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That ring compressor is for installing the pistons from the top in an automotive type engine. My compressor is about 1" wide...just enough to cover the rings...after the piston is in, the ring compressor band can be removed from the handle that is used to squeeze it, and the band has a gap in it so you can slide it past the connecting rod...still....it would take four of my compressors and about four guys to do that engine.

I've also done this with multi cylinder engines...I put the cylinder block on the bench upside down...put the pistons in one at a time until just the wrist pin hole is showing beneath the cylinder wall...then take the whole thing and place it carefully over the studs...slide it down....with all the rods in the right place then you side the wrist pins through the pistons...however this method makes installing the wrist pin clips a real bitch...and I don't even know if it would work on a four cylinder cause you wouldn't have room to get the pins in.

Damn....you gotta invite some friends over...drop the cylinder block on the pistons..and just squeeze the rings one at a time until you get the block down.
Like 250 Champ said...if the wall chamfer on the bottom is correct they should slide on relatively easy...I usually polish the ring ramps at the bottom of the cylinder with scotchbrite before doing this.
JohnnyB
 

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Discussion Starter #16
So Johnny do you think I could take my tin snips to the compressors I have and cut them into a 1" strip and make it work? That was my next shot since I have no friends.



J "not that" D
 

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Actually....if it was me...I'd probably take a shot at doing it by hand. It's not as hard as you might think. Drop the block down, get the top of all the pistons in their holes. Get a small rubber mallet and tap on the block while looking for rings that are hanging up. Usually the top ring goes in pretty easy. The second ring is a little bit tougher...the bottom ring depends on if it's a three piece or not...the three piece rings go in pretty easy.
As you compress each ring the block will try to slide down a bit father..sometimes it has to be encouraged with the rubber mallet. Do the center two cylinders first so you can get to them easier. Then the outside two.
Now that I think about it you could use my method of putting the pistons in the cylinders first too....because you could do the center two cylinders first while so you still hand room to the pins and clips in.
JohnnyB
 
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