Author Topic: Pistons and rings  (Read 269 times)

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Online AlanJohn

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Pistons and rings
« on: August 09, 2017, 01:11:35 PM »
I'm going to try for the first time to fit my own new Pistons and rings to my Gto is it easy
Any tips l've got spare rings as l have a tendency to be heavy handed and break most things anything that could help will be most appreciated
Thanks very much
Alan

Offline OldSwartout

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Re: Pistons and rings
« Reply #1 on: August 09, 2017, 01:46:08 PM »
Check piston ring end gap, just to be sure it's OK before trying to install them on the pistons. 

It helps tremendously to have a piston seat tool like is shown in use on Page 8 of the 50-175 Service Manual (not shown in the 350 manual).  It keeps the piston square to the bore and keeps it from pushing down into the crankcase as you try to install the cylinder over it.  You can use just about any flat stock for this purpose, you may need a little tape or a third hand to keep it in place.  Oil the rings and the ID of the cylinder at the bottom to help things slide together.  You will need to gently work each ring into the piston groove with your fingers as you try to set the cylinder down over them, being careful not to overlap the end of the ring over the locating pin in the groove.  A little motion of the cylinder, rocking and rotation, as much as is possible on the studs, will help. Whatever you  do, don't get frustrated and start tapping on the cylinder.  That doesn't end well.
« Last Edit: August 09, 2017, 01:47:54 PM by OldSwartout »
Karl Swartout
Mooresville, IN
BS175 Roadracer
BS350 GTR

Online AlanJohn

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Re: Pistons and rings
« Reply #2 on: August 11, 2017, 09:00:52 AM »
Pistons and rings are successfully fitted thanks for your help much appreciated
I've got a fair amount of engine oil in the crankcase will it burn off or is there any way to get it out
Prior to starting any suggestions would be most grateful
Thanks very much
Alan

Offline OldSwartout

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Re: Pistons and rings
« Reply #3 on: August 11, 2017, 07:01:05 PM »
It'll burn off, just don't fire it up in the garage, it'll take a few days for the fog to dissipate.  ;D

It will take a few miles of riding, though.
Karl Swartout
Mooresville, IN
BS175 Roadracer
BS350 GTR

Offline hardy

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Re: Pistons and rings
« Reply #4 on: August 12, 2017, 06:41:18 AM »
Congrats on a successful install!

To shake things up a bit, I like to do the job backwards. I install the piston with rings into the barrel while it's on the bench then lower over studs onto crackcase and install piston pin with barrel half installed. Again 3rd hand helps here. Also place a rag around the Conrod to stop piston clip falling into the abiss below!

Hardy

Online AlanJohn

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Re: Pistons and rings
« Reply #5 on: August 12, 2017, 07:54:33 AM »
That's exactly how I did it
Alan

 


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