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I’ve got an 88 accord that’s losing brake fluid. I have checked the usual suspects, calipers, lines, wheel cylinders in the rear. I have traced the lines and see no evidence of leaks. The master cylinder is weeping on the side of the booster but not at the amount that I have added. I wonder if it is leaking into the booster itself. is this possible and if so do I need to replace both components? Thanks for you help in advance, Robert
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I have heard of them leaking into booster and destroying them. You might try to replace Master cylinder 1st and see. It stinks to find out you have to take it back off but wouldn’t want to throw a booster at it for no reason.
Yeah I think that’s what the plan is gonna be. New master cylinder and inspect the booster. remove any fluid from it and give it a whirl. Thanks for the help. I’ll post what I find.
Did the master cylinder replacement and all seems well. Now to adjust the E brake and back to business as usual. Thanks for the help
Master cylinder can leak from where they connect to the booster and ruin all the seals and diaphragms at the booster. Its most certainly leaking from there and if thats the case i would remove the booster also and inspect it and maybe remove any fluid thats in it before it does any more damage
sounds like you replaced the master, in which case you would have been able to inspect the inside of the booster for fluid.
We had a shaft seal fail in our Odyssey’s master cylinder, and the booster would suck all the fluid out. I couldn’t figure out where it possibly could be going, until I removed the master, then the mystery was solved! Replaced both, and was good to go. (as an added bonus, Honda eventually did a recall on the mater cylinder, and through that I was able to get reimbursed for the replacement master cylinder and booster.
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