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1997 Toyota 4runner...
 
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1997 Toyota 4runner - Rear brake drum overheating

  

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Hi Scotty, 

Big fan of your your videos, especially the bell at the end. 

 

Issue: 1997 4runner that has a RH drum that keeps over adjusting, heating up to 200+ degrees Fahrenheit. 

History/actions taken to date: I noticed this after I changed the rear shoes, hardware and cylinder (drums weren't replaced, didn't have much mileage on it). First thing I did was open up the drums to double check all the springs were EXACTLY the same on both sides and that they followed the factory position spec, however the issue still kept creeping. Before I decided to spend money on parts, someone on a Toyota forum mentioned the RH drum is known to have this issue, and to help stop it they added a washer on the pivot bolt of the RH brake shoe, where this would help increase the gap between the adjuster mechanism and the star wheel. After doing this, I couldn't notice a difference, my drums were still getting hot over several days of use. So, I decided to start throwing money at it, I convinced my self to crawl back underneath and fix up the bellcranks, even though my brakes didn't have an issue with releasing or being stuck. I took apart both bell cranks, cleaned them up well, and lubed it with silicone, and I replaced the parking brake cable (1 single cable that runs from the cabin, down under to the LH drum with a pivot point to the RH drum) where the rubber accordion boot was torn on the old one. So, to sum up this paragraph, new hardware/springs/cylinders are in order, washer added on the RH drum shoe pivot bolt, cleaned and lubed bellcranks, new parking brake cable, and set all the adjustments (both cable and bellcrank) per the factory spec, did I solve this mysterious over adjusting? Temporarily.... I noticed that it took longer for the RH to overadjust than before, but it still has a slow creep and I'm running out of options and patience on fixing this, please help! 

 

My catch all to fix this issue, is to delete the damn auto adjusters and adjust it manually from time to time.

 

 

Thanks in advance, 

One of your grateful fans, 

AV

 


1 Answer
1

Only two things can really do that either esophageal unit is not working correctly or if you have a bad brake line or hose that is internally corroded it can let pressure get to the wheel but then when you take your foot off the brake it doesn't release that pressure which makes it stick


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