unstuck cl-77

Larry G · Post by **Larry G** » Wed Mar 14, 2012 7:27 pm

Here is my question, I hope someone out there can give me some advice.
I bought a 1967 305 scrambler, it was locked up, I took it apart (1st time for me taking a engine apart) both pistons had rust in them and were rusted to the sleeve in the cylinder, I did get them apart with some wd-40, my question is: can i just sand the rust off the piston and in the sleeve and replace the rusted rings? the cylinders look great the only rust i found was on the piston and in the sleeves? can you buy new sleeves? is that what you do when you get oversized pistons does it come with new sleeves? this is kinda confusing and I am just trying to learn, can I buy the OEM pistons rings and sleeves and just keep it at factory specs? this is my first build and I am just trying to learn. Thanks

davomoto · Post by **davomoto** » Wed Mar 14, 2012 7:38 pm

Don't sand the pistons, or the sleeves! Take both to a machine shop, and they can measure the pistons and the bore, and tell you if it will clean up with a hone, or if you need to bore it oversize. Get a manual, learn about motors, you're getting in deep, and it sounds like you have little to no experience.

Davo

Larry G · Post by **Larry G** » Wed Mar 14, 2012 8:14 pm

Thanks Davo for advice, I am getting in deep! but I will learn I hope from some of the pro's on here like yourself (thanks) do i need to take the head with me or just the pistons and sleeves? to the machine shop. when they bore it oversize (if I am understanding this right) they bore the sleeve and the head stays the same size...is that right? you just reinstall the new bored out sleeve into the orig head?
Thanks, again.

linmictil2 · Post by **linmictil2** » Thu Mar 15, 2012 8:07 am

Morning; Turn the head up so you can see the vavle faces. Make sure both are closed.
Fill with kerosene and let sit for awhile. If the valves are good they won't leak through.
If they leak you may want to ask Loud Mouse if he will do them for you. He did mine and did a good job at a decent price. No use doing rings, pistons and bore without doing a valve job.
Keep reading the site as it will answer most questions as you proceed.
Good Luck mike

teazer · Post by **teazer** » Thu Mar 15, 2012 9:57 am

Almost. The shop will measure your parts and if possible will try to hone the existing liner in the block. Head stays at home for this trip.

If that doesn't work because either the rust is too bad or the bores are worn, you buy a pair of oversize pistons and rings and take them back to the shop. They will bore your loners to match the new pistons. They do not remove the liners, they are bored on a special boring bar designed for the job.

If a liner is removed and a new one is pressed back in, it is never completely round and will still need to be bored and honed after it's fitted. That's why it can't be done that way round. If your sleeves are loose, they need to be replaced or get a new cylinder block.

Larry G · Post by **Larry G** » Thu Mar 15, 2012 10:51 am

Thanks guys, I am learning so much from this syite and all of you, thanks for the great advice! Do you about how much a machine shop charges for this service?

mike in idaho · Post by **mike in idaho** » Sun Mar 18, 2012 2:16 pm

Don't press the sleeves out of the block, heat the block a torch(support the block at the edges, upside down)and the sleeves will slide right out. If you don't have a torch heat it in an oven at 400°(best done when the wife isn't home). Re-heat it later to re-install the sleeves.

Honda305.com Forum

unstuck cl-77

unstuck cl-77

CL77