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Automotive type help
Posted: Sun Oct 08, 2006 8:43 pm
by BD
Maybe someone who works on cars a lot or knows someone who does can help?
I took apart the master cylinder on an old motor cycle I am working on which sat for quite a while and managed to develop some rust inside the reservoir. There’s not really any pitting just some small areas where I can see rust.
Do I
A: Try to scrape it out
B: Spend $120+s/h to replace it
C: Ignore it because Brake fluid will have no further negative effects on it
Is there some chemical that won't hurt the brake parts but will kill the rust?
Posted: Sun Oct 08, 2006 9:09 pm
by warf
Brake part cleaner?
Glass bead blast, then brake part cleaner?
Posted: Mon Oct 09, 2006 1:16 am
by BD
Will glass bead blasting work if it's inside where the rust is? This is it, 6" left to right
Posted: Mon Oct 09, 2006 1:36 am
by (V)OPAR[CotC]
brake cleaner and get all that you can out then add brake fluid, bleed the brakes very will
Posted: Mon Oct 09, 2006 5:49 am
by warf
Bead blast mey change the inside of the cylinder, so it may not be a good idea.
I think if it's not pitted, Vopars seems like a good try,
Have you looked for a used on at a junkyard?
Posted: Mon Oct 09, 2006 9:11 pm
by BD
Brake cleaner... oddly enough I never thought of using that on anything other than the service rifle... heh. Thanks!
Posted: Mon Oct 09, 2006 9:24 pm
by Rico
If the rust isn't in the area where the piston moves, no problem.
Some brake cleaner and piston seals don't get along.
Lukestr would know much more about this. Maybe Dave can help you to get ahold of him???
Posted: Tue Oct 10, 2006 12:23 am
by KrAzYdAvE
Naval Jelly eats rust (not the crap in your belly button after a long run either!)... though I don't remember where you can find that stuff anymore.
other than that, a small wire brush (not steel!) will do, then clean it with brake cleaner to get all the remnants out.
And as Rico said, as long as it's not in a place where the piston rubs, you should be fine.
Oh yeah, and keep the brake cleaner away from the rubber... it'll fux0r it
Posted: Tue Oct 10, 2006 9:16 pm
by BD
Replacement wheel cylinders are installed.
Master cylinder is completely apart and soaked in fluid. Tomorrow I'l douse it in Jelly (I have some) overnight.
Do I need to give it a bath between Jelly and Brake Cleaner? like some Orange fizzie balls and alberto VO5 or just spray on the cleaner?
Posted: Tue Oct 10, 2006 9:48 pm
by KrAzYdAvE
leave the jelly on for only 10-15 maybe 20 minutes then rinse it off with water. I wouldn't do it overnight or it'll be like scraping dried cake frosting from your jeans the next morning. Then use the brake cleaner to get anything that's left and dip it in the brake fluid again to keep the rust off.