Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hello I will help you with your question,
Has any work been done to the brake system?
Does the pedal feel normal before the brakes lock?
Do the brake lights work properly?
It sounds like the master cylinder is being pressed just a bit and as the fluid heats up it cannot return through the master so it applies the front brakes.
Next time you lock them up try loosening the nuts holding the master to the booster. If the brakes release you can install a pair of washers to hold them apart or the pushrod in the booster can be shortened a bit to give it a little more play.
Try this and let me know if you have further questions
Why do you have to remove the front tires?
You have it correct, it should just take a few turns to loosen it then you can check to see if the brakes are still locked up.
Could be but you have both front brakes applying after you drive. If the calipers were stuck they wouldn't take that long. You can probably make it happen sooner if you apply the brakes firmy a few times from 40 mph using a quiet road. This will heat the fluid faster. Don't get them too hot but it should be much less than 100 miles.
OK< I will be here for another 4 hours tonight, let me know what you find
No need to reply til you have results - Thanks
Were you able to check this out?