Need some help with Brake issues
I installed it on the car, blead the brakes drove it for a bit and every time I hit the brakes the oil light would come on and go off, see video below
Unless as otherws have said you some how messed the wireing up to get the oilsender confused with the brake warning light. The oil waring light is telling you your ENGINE oil is low, or your bearing clearances are so loose tgat the engine can not keep 8 to 10 psi oil pressure at idle, or the oil pressure sender is bad.
I have had that happen on my 120,000 mile rebuild on my 273. Oil light would come on everytime i came to a stop. I changed it for a new one, and now it only comes on if I let the oil get too low, like 1.5 to 2 qt low and i get off an interstate off ramp and come to a stop. Lots of oil up top and a little slosh and it sucks air and drops oil presdure to 0 for a second.
I have since started checking my oil weekly, and using 10w-40 to help keep oil pressure higher.
As for the small (rear brakes) resivour draining and the large filling, my bet is the new power booster needs to have the pushrod length adjusted OR ( and you power brake whimps :rolleyes: out there help me out here) if you used a master set up for manual it will have a pushrod keeper in the piston, and it MIGHT be interfeering with the power booster push rod, keeping the mc piston in the wrong place. (I am assuming that the power master does not use one, but im just speculating)
The master uses fluid pressure from the large resovour to move the small resivour piston and if the pistons are not in the correct locations, ports will be uncovered and cause some of the symptoms you describe.
As for fluid loss in the resivour if it is not leaking out past the cap, the rear of the mc, it has to be leaking from the fittings, calipers, cylinders or proportioning valve.
Leaks are VERY traceable.
If we look at this logically you had a bad booster. Prior to changing it your brakes worked fine, no funny master cylinder issues with braking (yes as you found out it was seeping at the rear). You changed the booster and the master and started to have issues, you put the old master on and have the same issues as the new master. The only part incommon is the booster.
Get out your FSM and start reading.
Good luck.
