Brake Master Cylinder Cap Gasket

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Old 03-03-2017, 09:26 AM
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Brake Master Cylinder Cap Gasket

Hey AcuraZine,

Can someone tell me where I can purchase a brake fluid master cylinder cap gasket for my 2004 acura TL?
Brake Master Cylinder Cap Gasket-cap-gasket.jpg

A little background story, I've been pouring power steering fluid into my wife's brake fluid reservoir on her 2007 Acura TSX. (I know I am an idiot!). Her master cylinder cap gasket was inflamed so I couldn't put the cap back on. luckily the cap on my car fit so I gave her mine and off she went. Calling auto stores in the area they tell me I can only purchase the entire Master Cylinder. That doesn't sound right... but while searching online I couldn't find a cap gasket for my car. Hoping someone can help me.

Also, will it be ok if I just drained her brake fluid or do I need to replace anything? There hasn't been any signs yet that her brakes are messing up.
Old 03-03-2017, 09:38 AM
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Check a junkyard.
Old 03-04-2017, 09:09 AM
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A quick google of "power steering fluid in brake" seems to indicate you may have a very long haul ahead of you for your mistake. My first thoughts were "if it did that to the cap gasket what's going on with every other seal in the entire system. You can guess the rest. There's no way any of us here can know the extent of the damage. IMO I think you may be screwed. If you need new "everything" (calipers, ABS unit, master...) it could exceed economic sense to repair depending on the value of a 2007 TSX (or is it a TL... you said both in your OP) and if you can do the work or need to pay someone. I really hope I'm wrong on this.

Here's just one article.
AGCO Automotive Repair Service - Baton Rouge, LA - Detailed Auto Topics - What Happens When Power Steering Fluid Is Put In The Brakes
Old 03-07-2017, 07:51 AM
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I didn't want to be the bearer of the bad news but thanks Adobe for taking that bullet
Old 03-07-2017, 08:21 AM
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Check dealer, gasket may be part of the cap. 46662-S5A-003
You're going to have a long road ahead getting the brake system back to normal working condition
as the PS fluid has a detrimental affect on the rubber parts.

Last edited by Turbonut; 03-07-2017 at 08:24 AM.
Old 03-07-2017, 08:26 AM
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Originally Posted by Turbonut
Check dealer, gasket may be part of the cap. 46662-S5A-003
You're going to have a long road ahead getting the brake system back to normal working condition
as the PS fluid has a detrimental affect on the rubber parts.
I think he's seen 1st hand the effect it has on rubber
Old 03-07-2017, 10:01 AM
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If you indeed screwed up your brake system and need to replace some stuff let me know. I have a master cylinder and booster off of my 2005 TL I parted out. I can send it out whenever!




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