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When to Purchase New Brake Drums? #4498611
08/26/17 11:29 AM
08/26/17 11:29 AM
Joined: Sep 2002
Posts: 2,276
VA
Gebo Offline OP
Gebo  Offline OP
Joined: Sep 2002
Posts: 2,276
VA
My 2002 4Runner has a bunch of miles. I have replaced front rotors/pads and am now back to replacing the rear drum brakes. How do I know when to replace the drums?


'98 LEX LS400 280K
'00 LEX GS300 195K
'02 4Runner 225K
'05 Lex LS430 85K
'06 Toyota Highlander 145K
'09 Lex IS350 85K
'07 Lex GX470 58K
Amsoil in all engines, transmissions and differentials

Re: When to Purchase New Brake Drums? [Re: Gebo] #4498637
08/26/17 11:59 AM
08/26/17 11:59 AM
Joined: Mar 2012
Posts: 1,288
San Antonio, TX
E150GT Online content
E150GT  Online Content
Joined: Mar 2012
Posts: 1,288
San Antonio, TX
Im pretty sure there is a spec on thickness you can measure.


1984 Mercedes-Benz 300SD - 100k
1995 F150 XL 4.9 reg cab 5MT - 251k 5w30
2016 Mazda6 Touring 6MT - 57k 10w30
2006 Buick Lucerne CXL 3.8 31k 5w30
Re: When to Purchase New Brake Drums? [Re: Gebo] #4498639
08/26/17 12:03 PM
08/26/17 12:03 PM
Joined: May 2014
Posts: 3,667
Columbus,Nebraska
Yah-Tah-Hey Offline
Yah-Tah-Hey  Offline
Joined: May 2014
Posts: 3,667
Columbus,Nebraska
I believe the maximum ID is cast into a brake drum. Most shops won't turn a drum if the ID will exceed that spec. Should be somewhere on the drum. I haven't had anything with brake drums for several decades but expect brake drums still carry the maximum ID.

Re: When to Purchase New Brake Drums? [Re: Yah-Tah-Hey] #4498640
08/26/17 12:05 PM
08/26/17 12:05 PM
Joined: Sep 2002
Posts: 2,276
VA
Gebo Offline OP
Gebo  Offline OP
Joined: Sep 2002
Posts: 2,276
VA
Originally Posted By: HosteenJorje
I believe the maximum ID is cast into a brake drum. Most shops won't turn a drum if the ID will exceed that spec. Should be somewhere on the drum. I haven't had anything with brake drums for several decades but expect brake drums still carry the maximum ID.


I just watched an "Eric the Car Guy" video and that's what he said. thanks!


'98 LEX LS400 280K
'00 LEX GS300 195K
'02 4Runner 225K
'05 Lex LS430 85K
'06 Toyota Highlander 145K
'09 Lex IS350 85K
'07 Lex GX470 58K
Amsoil in all engines, transmissions and differentials

Re: When to Purchase New Brake Drums? [Re: Gebo] #4498653
08/26/17 12:25 PM
08/26/17 12:25 PM
Joined: Jul 2009
Posts: 432
Seattle
Superflop Offline
Superflop  Offline
Joined: Jul 2009
Posts: 432
Seattle
Drums are cheap (in general) if you are thinking about turning thrm just buy a new set and make sure to get new hardware and new adjuster kits with it too. Also since you are replacing all that hardware and have had or will have had to bleed the system, new hoses would be in order also and are cheap.


2002 saab 9-5 2.3t wagon
2014 dodge grand caravan
Re: When to Purchase New Brake Drums? [Re: Gebo] #4498687
08/26/17 01:07 PM
08/26/17 01:07 PM
Joined: Jun 2003
Posts: 5,921
Illinois
SHOZ Offline
SHOZ  Offline
Joined: Jun 2003
Posts: 5,921
Illinois
Bought a pair of drums for my Accent at AutoZone last summer. One was out of round out of the box and made a clicking noise when driving.


2008 Hyundai Accent 1.6L 5 sp manual hatchback
2010 Hyundai Genesis Coupe Track 2L Turbo 6sp manual
Re: When to Purchase New Brake Drums? [Re: Gebo] #4498765
08/26/17 03:17 PM
08/26/17 03:17 PM
Joined: Mar 2008
Posts: 6,842
USA
slacktide_bitog Offline
slacktide_bitog  Offline
Joined: Mar 2008
Posts: 6,842
USA
The rear drums usually get replaced much less often than the front discs, and considering that drum brakes are much harder to work on than disc brakes, you might as well replace them when you replace the shoes.

You may also want to replace the wheel cylinders, too. Rock Auto carries Advics wheel cylinders, made in Japan

Get the Wagner E-coated drums from Rock Auto. They are the best drums to get because their coating covers everything except the surface where the shoes contact. Most other coated drums don't coat where the drum contacts the hub and the wheel, leaving them prone to rust and impossible to remove.

Re: When to Purchase New Brake Drums? [Re: Gebo] #4498853
08/26/17 05:36 PM
08/26/17 05:36 PM
Joined: Dec 2006
Posts: 921
midwest
JamesBond Offline
JamesBond  Offline
Joined: Dec 2006
Posts: 921
midwest
If you replace the shoes etc. reuse the drum, if it all works out, cool, if there's a problem, then replace the drum.

Re: When to Purchase New Brake Drums? [Re: Gebo] #4498928
08/26/17 07:55 PM
08/26/17 07:55 PM
Joined: Jan 2016
Posts: 238
Ada county Idaho
MRtv Offline
MRtv  Offline
Joined: Jan 2016
Posts: 238
Ada county Idaho
2002. Hmmm. 15 years of stopping your car. I'd replace them. Very good chance they are out of spec now. I did the brakes on my 1997 F150 and didn't even bother measuring the id diameter. I just figured it was time. Especially when I did not know for sure what had occurred in the past with the kid who I bought the truck from.


2014 Nissan Versa Note 1.6 liter engine. 1997 Ford F150 4x4 4.6 liter engine.

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