Re: ANOTHER #%*!:( BTV failure

Posted by Eric Boyle On 2010/10/4 16:31:35

God, I'm turning into Keith, making multiple posts replying to myself!

Here's a theory: We have the wrong gasket. The return port is sealed up, and the fluid only has one place to go, into the booster. Over time, if no one checks the fluid, the fluid level gets low enough in the reservoir that it doesn't refill the plunger chamber. Therefore, there's air in the plunger chamber causing a compressible area and therefore no brakes. This would explain why you have brakes one minute and no brakes the next.

Now, the question is, how many complete failures have been verified to not have any fluid in the reservoir? It's either this, or fluid leaking past the compensator valve due to either it deforming enough to let fluid past, a chunk of something blocking it open, or fluid leaking past the piston rod and into the booster. There isn't much else that can go wrong.