I just picked up an 86 IROC for my son to drive while we figure out what to do with his 79 Camaro that got hit by a deer.

The car pulls to the left during braking. We had it aligned and that didn't fix it. I replaced both front calipers as they were cheap. Pads and rotors are like new.

I noticed during bleeding that the pressure from the bleeder is significantly higher than the right side. I've checked all the hoses and lines and can't find a leak to explain the pressure difference.

Thoughts?

 

Bad hose, kinked/pinched line? Doesn't need to be leaking to be a problem. Hoses deteriorate on the insides too.

 

Bad rubber hose most likely.

They have a rather tiny hole in their fittings that the fluid has to go through. They fail by rusting inside, which builds up unitl the hole gets blocked.

Replace them ALL. You have at least 3; 2 front, one in the center of the rear. Maybe one more if you have disc brakes. (which if so, are a whole other rabbit hole you'll be going down before long) All of them are made of the EXACT SAME material and have been subject to the EXACT SAME moisture-laden brake fluid (the fluid attracts moisture) for the EXACT SAME length of time which has caused the EXACT SAME amount of corrosion in all, give or take some statistical tolerance. IOW, if you replace one tomorrow, one other will fail in the EXACT SAME way in about 3 weeks, and the 3rd in about 4 more months, and EVERY TIME, you'll be draining and refilling and bleeding the WHOLE brake system. Just do it once and be done with it.

Did I mention anything about EXACT SAME? Take that message to heart and don't hallucinate that you can "fix" the one that's fornicated TODAY and everything will be alright. IT WON'T. It'll keep pain-in-the-a$$ing you one line at a time until you do them all. Meanwhile, your son's life, and that of everyone in front of him on the road, is at risk.

 

Sofa, as always providing sound advise!

JeremyM, this would be a great time to flush out all the old brake fluid that's been in there for who knows how long, many people don't realize the benefit of fresh clean brake fluid, this being your son's car you want those brakes to be able to work at their best.

 

Just one; replace ALL the brake hoses. They can look like new and still be deteriorating on the inside, causing a lack of fluid flow.

 

I should also add, to avoid your next post being about "spongy pedal that goes to the floor even with brand new hoses", DO NOT UNDER ANY CIRCUMSTANCES allow the master cyl to run dry while doing this!!! If that happens, it will be IMPOSSIBLE to bleed it fully without removing it and "bench bleeding" it, because the thing is tilted at such an angle in these cars that the lines are nowhere near the highest point in the cyls, meaning that air will remain at the top of the cyls no matter how much fluid you run through it or what kind of "power bleeder" you use. Which in fact, it might need ANYWAY; wouldn't be too much of a surprise in a car with unknown history; who knows whether there's already a bunch of air stuck up inside there now.