Why does left front brake overheat?

Asked by Sep 27, 2016 at 04:53 AM about the 2006 Chevrolet Malibu Maxx LS Fleet 4dr Hatchback

Question type: Maintenance & Repair

The left front brake started overheating, unrelated to actual braking, on my
2006 Malibu Maxx at 115,000 miles, with rotor and pads in good condition.  
Found the caliper piston seized, and the forward sliding pin seized/rusted,
which I assumed had caused the caliper problem.  Installed
remanufactured caliper, new pads,and remanufactured mounting bracket,
as the seized pin had broken off when I tried to break it loose.  Repair
seemed to be a success, but within a couple of days the problem returned.  
I have not torn it down yet, but is there any way that the master cylinder
and/or brake lines could prevent the piston from moving back?  I wish I had
tried to force the piston back in the failed caliper after I removed the brake
line, but I didn't think of that, and it has been sent back to the
remanufacturer.  The brake fluid that drained from the old unit looked
OK/free of water, and the fluid that vented during the bleeding of the new
caliper was in good condition also, suggesting no problem with the fluid
itself.  Any comments would be appreciated.

3 Answers

222,935

I'd replace the hose first, they tend to wear out internally. See if the condition goes away.

1 out of 1 people think this is helpful.
17,650

I agree with Tom to check for collapsed hose with rotor seized up loosen bleeder screw on caliper if rotor will spin freely the brake hose is bad if stays seized up caliper piston seized.

1 out of 1 people think this is helpful.
Best Answer

Replacement of the flexible line fixed the problem. The old line was indeed blocked in the area where the supporting clamp wraps around the flex line. (I cut the line several places to narrow down the location.) The blockage acts as a "check valve" letting fluid through under pressure from the master cylinder, but letting it flow back only very slowly once the brake pedal is released, thus keeping the brake engaged longer. While trying to recreate the problem prior to changing the hose, I found if I pressed the brakes hard while at a stop on level ground, there was a delay before the car would move forward at idle after releasing the brakes. Also had a bit of an adventure with the new part purchased at O'Reilly Auto Parts, "BrakeBest" brand, PN BH620474, $23.99 +tax. Initially, the new hose leaked at the caliper/hose joint. Inspection of the new copper washers provided with hose showed that the outer washer had embedded onto the hose mating surface thoroughly, as evidenced by clear concentric ring markings on the surface of the washer. The inner washer (between hose and caliper) showed little evidence of being deformed, despite having the identical clamping pressure applied to it. This suggests the inner washer was too hard, not properly annealed. A comparison of the new washers to the old (still embedded on the old hose) showed that the new ones are larger in OD (0.637" vs. 0.590") with about 1/3 more surface area, making them that much more difficult to "crush." I took one of the old washers and used it (smoother side toward the new line surface) and the leak was fixed.

Your Answer

Add photo

Related Questions

  • Car overheats 8 answers

    Car gets between c and h and overheats 05 impala

    2005 Chevrolet Impala LS

    -

    Maintenance & Repair

  • overheat 2 answers

    Ok so I drive a 95 chevy pick up... and today I was driving and I noticed my heater was blowing ice cold abs my was over heating so I pulled over and just as I was stopping It lost power and the ...

    Chevrolet

    -

    Maintenance & Repair

  • My 2000 Chevrolet lumina overheats 1 answer

    My car overheats but only on temperature gauge .

    2000 Chevrolet Lumina 4 Dr STD Sedan

    -

    Maintenance & Repair

  • Front Rotors Gone but Pads Still Good 5 answers

    I just replaced the front brakes on my Cobalt SS. The rotors were warped and I could see they were badly grooved so I expected the pads to be down to metal. To my surprise the pads were barely wor...

    2006 Chevrolet Cobalt SS Supercharged

    -

    Maintenance & Repair

  • Overheats

    Overheats extremely fast and has issues braking and slowing down whenever it is overheating

    2000 Jeep Cherokee

    -

    Maintenance & Repair

Malibu Maxx

Looking for a Used Malibu Maxx in your area?

CarGurus has 501 nationwide Malibu Maxx listings starting at $2,600.

ZIP:

Search Chevrolet Malibu Maxx Questions

Chevrolet Malibu Maxx Experts

#1 firebird338
firebird338
Reputation 150
#2 chevyyoungster07
chevyyoungster07
Reputation 90
#2 Richard Schroer
Richard Schroer
Reputation 90
View All

Related Models For Sale

Used Chevrolet Malibu
1,007 Great Deals out of 85,671 listings starting at $1,995
Used Chevrolet Impala
796 Great Deals out of 34,383 listings starting at $799
Used Dodge Charger
357 Great Deals out of 29,619 listings starting at $2,475
Used Honda Accord
811 Great Deals out of 81,609 listings starting at $899
Used Chevrolet Equinox
1,261 Great Deals out of 65,886 listings starting at $1,600
Used Nissan Altima
1,090 Great Deals out of 82,556 listings starting at $670
Used Toyota Camry
1,103 Great Deals out of 96,275 listings starting at $1,250
Used Ford Mustang
364 Great Deals out of 44,400 listings starting at $1,000
Used Ford Fusion
1,068 Great Deals out of 78,350 listings starting at $1,250
Used Chevrolet Tahoe
778 Great Deals out of 28,448 listings starting at $1,500