Sandblasting M20 flywheel?

[spiDmang]

Hey guys,

So i've been trying to research if you can sandblast an M20 single mass flywheel? I've been reading mixed reviews on this, and wanted to discuss the possible con's (if there are any) to doing this?

The car i will be getting the flywheel from has been sitting outside for quite sometime, and im sure it could use a good blast.

Please let me know your thoughts! This is the most reasonable/cost effective route for me.

Thanks a ton,

-Brad

[SkiFree]

If you resurface the friction surface afterwards you will be fine.

[AndrewBird]

^^^What he said.

Sandblasting the friction surface will ruin it, but won't do anything harmful to the rest of the flywheel. May want to avoid blasting the ring gear teeth as well. Might make them a bit rough.

[TobyB]

why would you want to do this? Profit???

If you did, you'll want to paint it, because the increased surface area from blasting will rust a lot faster.

I disagree with Andrew- you could blast the friction surface. It's just cast iron.

Your first few launches will be... abrupt.
Then it'll wear smooth.

I would NOT blast the mounting surface- it might cause mounting problems, as in, it'll loosen.

But personally I wouldn't bother to blast any of it....

t

[M-technik-3]

What about soda blasting, most media blasting shops can do this as well and it's far less abrasive.

[spiDmang]

why would you want to do this? Profit???
If you did, you'll want to paint it, because the increased surface area from blasting will rust a lot faster.
I disagree with Andrew- you could blast the friction surface. It's just cast iron.
Your first few launches will be... abrupt.
Then it'll wear smooth.
I would NOT blast the mounting surface- it might cause mounting problems, as in, it'll loosen.
But personally I wouldn't bother to blast any of it....

t

Profit? Off a flywheel? nawwww lol

I have a flywheel in my possession that has been outside for quite sometime. I wasn't sure if the flywheel had to be cleaned prior to installation

If you resurface the friction surface afterwards you will be fine.

^^^What he said.

Sandblasting the friction surface will ruin it, but won't do anything harmful to the rest of the flywheel. May want to avoid blasting the ring gear teeth as well. Might make them a bit rough.

The plan is definitely to have it resurfaced. I also have to get it shaved down since this is for an S52 swap

What about soda blasting, most media blasting shops can do this as well and it's far less abrasive.

very cool. I'll look into it!

Thanks everyone for the responses

[AwakenNoMore]

Don't blast it. Just shave weight off the back and resurface the front. Clean the ring gear teeth with a wire brush if needed. Done and Done.

[TobyB]

Mmm, yeah, and you can paint it too, if you want to reduce rust. I would not paint the friction surface.

But the mounting surface should be clean and shiny, too, both where it mates
to the flywheel and where the bolt shoulders contact it. Otherwise, the rust
will compact and move over time, and may loosen.

Or it may rust more, swell,
and break the bolts. (This is very unlikely, of course)

t