When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I Have an 87 and it pulls pretty hard to the right when I brake. I checked calipers and they all seem to depress and there are no leaks... So I am wondering if it could be the proportioning valve. The brake booster and master cylinder are new. But I do not know much about the portioning valve on this vehicle or where it is. Any help would be greatly appreciated. Thank you!
I Have an 87 and it pulls pretty hard to the right when I brake. I checked calipers and they all seem to depress and there are no leaks... So I am wondering if it could be the proportioning valve. The brake booster and master cylinder are new. But I do not know much about the portioning valve on this vehicle or where it is. Any help would be greatly appreciated. Thank you!
Are the brake hoses NEW or very recent? There's substantial difference in a manual depress of caliper piston and the hydraulic exercise of the piston from pedal operation.
Actual "proportioning control" is integral to the master cylinder. Distribution to each wheel is through the ABS Modulator valve.
Are the brake hoses NEW or very recent? There's substantial difference in a manual depress of caliper piston and the hydraulic exercise of the piston from pedal operation.
Actual "proportioning control" is integral to the master cylinder. Distribution to each wheel is through the ABS Modulator valve.
Those plastic/rubber hose lines for the front brakes are not new, nor recently replaced. They do not leak though. Could this effect the pressure for the depression of the caliper? thank you also for the information on the master cylinder!
Brake proportioning refers to the front/rear bias.
You have a pull which means one side isn't working as well as the other side.
I would. try a brake flush before I did anything else. If that doesn't work then you're probably looking a caliper or a hose issue.
Brake hoses usually collapse on the inside so they look normal on the outside. Stock hoses from GM may be the best choice - if they're available. Stainless hoses are cheaper though.
If you reach the point where you're going to replace the rubber hose you might as well rebuild the calipers. And, if you're replacing the calipers why not do the rotors at the same time?
Those plastic/rubber hose lines for the front brakes are not new, nor recently replaced. They do not leak though. Could this effect the pressure for the depression of the caliper? thank you also for the information on the master cylinder!
I'd think that NEW brake hoses would be a "TO DO" both by just age and you now have a known issue that's created by failing deteriorating brake hoses. Brake hoses X 4 !!
Thanks guys! This is great I didn't know the lines could fail from the inside out, I'll defiantly be putting on a new set of either steel or rubber lines on soon, as it probably should be done do to age, thanks again!
I'd maybe check with "local" AP stores for OE type. It seems that the suppliers of the SS product sometimes use a banjo fitting of an incorrect dimension and the OE banjo bolts won't work. They sometimes supply bolts but it seems that recently sometimes don't.
Your link took me to a '94+ product but you did mention "SIMILAR"! You need to be sure to buy appropriate model year parts.
proportioning valve
