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General Category >> Rubber Side Down! >> Removing Cylinder Base Gasket.
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Message started by Moarpower on 11/11/22 at 19:33:57

Title: Removing Cylinder Base Gasket.
Post by Moarpower on 11/11/22 at 19:33:57

Hey guys.
Getting the cylinder bored on Monday and the base gasket is really stuck on there and not coming off easy or in one piece. Any tips on getting it off? Just time and patience I guess but it's really baked on there.

Title: Re: Removing Cylinder Base Gasket.
Post by zevenenergie on 11/12/22 at 02:57:39

High Dave,

I sometimes see engine builders put their blocks in a kiln to burn off all the oil and gaskets.

I once did it with a rosebut acetylene burner with the highest possible excess of oxygen. The block stays reasonably cool and the oxygen burns everything that wants to burn. It's a bit risky maybe on a savage cylinder.

If you don't have all that then maybe acetone can help. That solves just about everything.

Title: Re: Removing Cylinder Base Gasket.
Post by Gary_in_NJ on 11/12/22 at 03:38:43

A razor blade and time is all that is needed.

Title: Re: Removing Cylinder Base Gasket.
Post by Moarpower on 11/12/22 at 03:58:25

Yeah I have been working at it. But what's left is hard as a rock. I might just see if the shoe can do it when it's in to be bored

Title: Re: Removing Cylinder Base Gasket.
Post by justin_o_guy2 on 11/12/22 at 08:23:16

I was going to suggest leaving it alone and ask them to get it. I'm pretty sure they have what they need.

Title: Re: Removing Cylinder Base Gasket.
Post by TheSneeze on 11/13/22 at 11:31:34

Harbor Freight sells some hard plastic chisels in a set of various sizes. They worked like a charm for me, and you can't harm the sealing surface like with a razor blade.

Title: Re: Removing Cylinder Base Gasket.
Post by justin_o_guy2 on 11/13/22 at 15:28:29

I've seen these used on YouTube. They look to be doin a great job. I've seen them in use and watched in amazement that they aren't wearing away in minutes.

Then I saw the price.. They better Not go away like an eraser.

https://www.ebay.com/itm/3M-07524-Roloc-Gasket-Remover/403394889765?var=0&mkcid=1&mkrid=711-53200-19255-0&campid=5338590836&toolid=10044&customid=bee8de211c0213341bd0bd5060aa480e&pageci=e4b91d2e-f2cc-4798-896a-1ee5c6e9e72b&epid=1811802430&redirect=mo

Title: Re: Removing Cylinder Base Gasket.
Post by verslagen1 on 11/13/22 at 16:50:22

Well, it's a box of 10 and you can get them cheaper elsewhere.

Title: Re: Removing Cylinder Base Gasket.
Post by justin_o_guy2 on 11/13/22 at 18:50:23

Yeah, saw it was ten.. Still not super cheap but I've seen Condon ,the generator guy, run them and other YouTube folks. I should have one, but not ten.

Title: Re: Removing Cylinder Base Gasket.
Post by Moarpower on 11/13/22 at 19:35:59

They look cool but I'm having a hard time removing this materiel with a steel chisel! It's like it's turned to stone. Clearly the original gasket. It literally like a rock. I even used a soft wire wheel on a drill and it barely scratched the surface. I have manage to remove some but what's left is just amazing.

Title: Re: Removing Cylinder Base Gasket.
Post by Gary_in_NJ on 11/14/22 at 05:48:00

Be careful not to remove any aluminum otherwise you will have a permanent leak upon reassembly. I use a utility blade held at a ~30 degree angle - wiggling it back and forth as I advance it forward. The blade MUST be new and sharp. You may go through many blades for the small amount you need to remove.

Title: Re: Removing Cylinder Base Gasket.
Post by justin_o_guy2 on 11/14/22 at 09:21:59

Sounds like plenty of reason to let them get it

Title: Re: Removing Cylinder Base Gasket.
Post by DragBikeMike on 11/14/22 at 11:40:30

I agree with Justin. Let the machine shop clean up your base gasket.

My experience with the newer asbestos-free gaskets has been a mixed bag. Sometimes they just sort of flake off in chunks. Pretty easy to remove. Other times the things seem to be welded on and are hard as concrete. Taking a wire wheel of any kind to your aluminum gasket surface is not gonna do the cylinder any good at all.

There are commercial gasket removal products that you spray on to soften the gasket. I don't like em. They eat up paint and powder coating (and I suspect your fingers too).

I use my lower torque plate with some 220 grit wet & dry abrasive. Lot's of water keeps the gasket material from loading up the abrasive paper. It does a nice job but you must be careful to only remove the gasket material and not the aluminum. The torque plate is machined perfectly flat. You can't use any old scrap material, it has to be perfectly flat. Like don't try this with a chunk of wood.

Title: Re: Removing Cylinder Base Gasket.
Post by DragBikeMike on 11/14/22 at 11:41:49

It's easy to use and removes the old gasket in short order. Just gotta be careful not to remove aluminum.

Title: Re: Removing Cylinder Base Gasket.
Post by DragBikeMike on 11/14/22 at 11:43:54

The finished product is good. But as I said, you gotta be careful.

Title: Re: Removing Cylinder Base Gasket.
Post by Moarpower on 11/14/22 at 16:38:14

Thanks Mike.

Yes I want using the wire wheel for any length of time. Just to see how hard the material was.
I will definitely be leaving in there and paying the shop and saving myself the frustration.

Just waiting for the piston then taking it in.