So i got a 2003 CRV, bought it about 6 months ago, initialy was suspicious of the brakes coz they jsut didnt feel perfect.
Mentioned it to honda service staff 3 months after buying it, when I had transmission fluid changed and they ended up giving me a list of hundred of thigns that needed fixing, not one of them had anything to do with any of the issues ive had with, overheating, VTEC failures, or even this life threatening brake issue. so look i jsut dont trust anyone here.

SO me and the family drove over the hills, steep hills,bout a 20 km drive, and on the way down I got some heart stopping moments where the pedal went a,lmsot to the floor and, with my experiience driving bush bashing cars, i knew t pump it hard and fast. i managed to get it to stop, pulle dover, let it col down adn drove incredibly slowly in 1st gear all the way t our destination. Our destinaton is the midle f nowhere, where people idea of a good mechanic is one that actually shows up. THey dont have any idea about anything beyond the basic single port master cylidner to all 4 brake calipers, so im on my own, and i have this forum and a few other sources, but it seems its a taboo subject. So please refrain from teling me to GO TO HONDA. its impossible.

Anywya the clown of a mechanic and his posy showed up after my request for a blake fluid flush, and started banging things. I made the mistake of pointing at the master cyulinder and suggesting it may be the culprit, so all their attention turnedd to that. They started destroying everythng to get the master cylinder off and threw brake fluid all over the engine bay, and got it off, tok one look at its complicated nature (compared to the simple things they are used to seeing) and said BUY NEW ONE OF THESE SIR THEN WE COME BACK INSTALL IT.
I agreed, but then realised, this is the philippines and there is no parts available. So after they left i took apart the master (without circlip pliers lol) and it looks brand new. it is the honda original, and all teh ruber looks pristine.
Saying that, the reservoir was filthy, i suspect to decades old brake fluid, which had turned green in the reseroir.
I i jsut cleaned it all out, reassembled, removed all 4 wheels, and started gravity flushing the entire thing, which turned into a circuis of locals helping with the 2 man bleeding process. (with a rusty old car jack that took 5 years off my life). for some reason, even with the ABS module, this seemed to work ok and i started to see clean fluid come out of all 4 corners.
Took it for a littel test drive, and brakes seem jsut ok, same as when i first bought it, bit spongy and not perfect, but functioning. S today ill test it on the highway on my own, its a sunday and no ones out,

MY question,
WHo here is an expert on the issue, and can tel me how on earth a dual piston master cylinder fails totaly only when hot.

I beleive FWD vehicles master cylinders have one port for FR/RL and the second port for FL/RR, as opposed to the old conventional front to rear proportioning dual master cylinder setup.
Is it possibel that the fluid was so old and terrible that it boiled on both fronts? i had jsut done some intense braking before the issue occured, and the car was incredibly hot, it actually overheated when we arrived at destinaton.
Is this really a thing? or is it a marketting ploy to sell brake fluid? that question might sound stupid, but I dont have the time or money to be subject to such trickery and I havent ever seen first hand any evidence. nto much discussion abotu it on the net, coz ppl jsut pay someone to fix their issues.

 

Your family comes first, take is to a different dealer.

 

yeh, that would be nice, but this is the only dealer, adn i cant take t there, because the car is out of reach unfortuantely.

Anyhow, an update, i was so angry i started dissasmbling the thing myself after a test drive prooved it wasnt substantialy better after the flulsh and replace, and after 20 minutes using vacuum pressure to suck mroe dirty fluid out of thefront right I got to the front left and noticed the front left wheel nuts were increidbly hot. I ble dthat with teh vacuum setup too but couldnt manage to get anything to come out wihtout pumping the pedal.
The front left caliper was completely mecahnical seized and i couldnt seperate it at all. had to pry it off with a lot of force.

Took caliper apart and its completeyl gunked up inside, probabyl the flex hose.

So old fluid, seized calipers, collapsing flex hosees, the things just another disaster waiting to happen.

 

If your caliper was stuck then the pads would heat up the rotor and the whole thing would get extremely hot
Heat is the enemy of brakes. It can make the brakes fail.
So, you would need to overhaul the calipers (retrofit) or replace them.
Make sure the bleeder valves are on top side of caliper. Air goes to the top.
Air needs to be bleed out of brake system.
Yes, the flex hose has been known to be able to act like a check valve
Preventing fluid to flow both ways. If you can then replace them also
Other wise clean them out and make sure they won't leak.
I wish you luck. Hopefully you can get the parts you need and fix it right

 

yeh and the sludge i found in the caliper chamber has me worried about that flex hose!
How do you replace them? im at home in the city now and dont have the car here to look at, and want to prepare. Is it a special tool crimp job?

 

Sorry, do not have enough experience in this to advise.
Was hoping that you would update us.