LS400 caliper rebuild (4 piston)...retaining ring or no ring?
#1
LS400 caliper rebuild (4 piston)...retaining ring or no ring?
I picked up an used set of LS400 4 piston calipers. One side of the caliper had no retaining rings on the boots and the other side has mismatched retaining rings.
- are the rings necessary?
- where do i get replacement rings?
the lexus rebuild kit doesn't have the rings.
help?
Thanks!
- are the rings necessary?
- where do i get replacement rings?
the lexus rebuild kit doesn't have the rings.
help?
Thanks!
#3
so the seals are...
top right - piston seal
bottom right - piston boot
center left - retaining ring
the seal kit from lexus is missing that retaining ring. one caliper did not have rings. the other caliper did. I assume i should reuse the rings on the one that had it. i would like to get new rings since the old ones look pretty bad. any idea where to get them?
i believe it's from a 98 and up 4 piston LS caliper.
#4
Lexus Test Driver
iTrader: (18)
so the seals are...
top right - piston seal
bottom right - piston boot
center left - retaining ring
the seal kit from lexus is missing that retaining ring. one caliper did not have rings. the other caliper did. I assume i should reuse the rings on the one that had it. i would like to get new rings since the old ones look pretty bad. any idea where to get them?
i believe it's from a 98 and up 4 piston LS caliper.
or check out
http://www.trademotion.com/partlocat...?siteid=214915
and
http://lexus.sewellparts.com/parts-c...S400-1998.html
i looked for you and didn't see a retaining ring
#5
i hear what you're saying. i've seen all the diagrams but for some reason THIS LS caliper has a ring around the boots. i was confused since like you linked there's no part number or a link to a snap ring like that for the LS seal kit. i got the kit and no ring.
so i was surprised that this one caliper has rings on it...of course the other caliper was ring less.
the pic i linked is a generic pic of rebuild kit/seal kit.
so i was surprised that this one caliper has rings on it...of course the other caliper was ring less.
the pic i linked is a generic pic of rebuild kit/seal kit.
#7
the 4 piston set up is different on where the rings go. they are on the outside.
top piston is with ring...bottom without ring,.
no rings here...
these are probably not great pics...i'll take better ones tonight.
top piston is with ring...bottom without ring,.
no rings here...
these are probably not great pics...i'll take better ones tonight.
Last edited by mktbully; 12-06-11 at 06:46 AM.
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#10
Lexus Champion
Retaining rings required for front caliper rebuild??
Thats interesting! When i purchased my rebuild kit it only came with the piston seal and dust boot. When i took apart my caliper i did not see a retaining ring. You should be able to go to the dealership and pick up that retaining ring. They probably can show you a diagram of the different parts that are used in the caliper
or check out
http://www.trademotion.com/partlocat...?siteid=214915
and
http://lexus.sewellparts.com/parts-c...S400-1998.html
i looked for you and didn't see a retaining ring
or check out
http://www.trademotion.com/partlocat...?siteid=214915
and
http://lexus.sewellparts.com/parts-c...S400-1998.html
i looked for you and didn't see a retaining ring
, TOYOTA P.N. 04479-50091
Toyota's rebuild kit did not include retaining rings.
As OP questions whether caliper piston seal retaining rings are required, so do I.
If retaining rings are required, what are P.N.s?
This question is for anyone that has actually rebuilt front calipers on a 1998-2000 LS400 or has close up images of clips.
Following image depicts seals included with rebuild kit. The large retaining ring is from the rear caliper rebuild kit and for illustration
Retaing rings?
Lexus parts diagram does not depict retaining rings....
# 04479
Rear caliper exploded parts diagram depicts retaining ring... # 04479A
Last edited by YODAONE; 04-21-19 at 03:41 PM.
#11
I've bought the Centric caliper rebuilt kits for my 97 LS400 & they all came w/ the retainer rings. Just completed the 2 rear calipers a few days ago. Very easy to do. I was going to rebuild the 2 front calipers as well, however upon inspecting, they're still good so I'll hold off on it for another 10K miles until the front pads are ready to replace. Anyway, the purpose of the retainer ring is to hold the dust boot in place when the piston is moving so it s/b in use, however once the caliper is in place, there's very very little movement on the pistons when you apply the brake so I'm sure you can get away without the rings but again we should use it.
#12
Btw, I've seen many of Yoda's posts & I can tell he's very thorough. I'm not sure why the Lexus' diagram for the front caliper doesn't show the retainer ring. I don't know but as I was saying, there's very very little movement on the pistons once the caliper is in place so perhaps it's not that important.
Last edited by Superfast1; 04-23-19 at 03:26 PM.
#13
Lexus Test Driver
iTrader: (1)
Different year - but my 1991's Lexus rebuild kits came with the retaining c-rings on front and rear. Very different brakes, though. I just happened to come across the old ones when digging through the crap in my garage yesterday, and thought to look, due to this thread.
For my 1991:
04479-50020 rear brake caliper overhaul kit
04479-50030 front brake caliper overhaul kit
I would not worry at all about re-using a c-ring.
If it is supposed to have a c-ring, I would definitely make sure I used one.
For my 1991:
04479-50020 rear brake caliper overhaul kit
04479-50030 front brake caliper overhaul kit
I would not worry at all about re-using a c-ring.
If it is supposed to have a c-ring, I would definitely make sure I used one.
#14
Super Moderator
iTrader: (6)
I've bought the Centric caliper rebuilt kits for my 97 LS400 & they all came w/ the retainer rings. Just completed the 2 rear calipers a few days ago. Very easy to do. I was going to rebuild the 2 front calipers as well, however upon inspecting, they're still good so I'll hold off on it for another 10K miles until the front pads are ready to replace. Anyway, the purpose of the retainer ring is to hold the dust boot in place when the piston is moving so it s/b in use, however once the caliper is in place, there's very very little movement on the pistons when you apply the brake so I'm sure you can get away without the rings but again we should use it.
#15
Lexus Champion
Front caliper seal kit with retaining rings
Finished rebuilding my front calipers using Toyota seal kit.
Apparently the factory did not use retaining rings on the piston external sealing boot.
After extracting the pistons, I observed a ring of crud on the piston lip (brake pad end) that is covered by the external sealing boot.
This suggests moisture and dust are migrating past the seal.
I purchased the Centric front caliper seal kit to acquire the seal rings.
Perhaps the factory dispensed with seal rings due to the close proximity of the bores will not permit proper nestling of rings around external seal
To resolve the issue, I clipped a short section of two of the 4 rings(each caliper) to eliminate interference.
The Centric rubber components were not of the same quality as OEM....and therefore do not recommend them.
Short section removed from two of the 4 external seal retaining rings.
Image depicts one external seal ring slightly clipped. Unless you perform this operation, the proximity overlap of rings interfere and will not nestle under the seal...and will likely pop out. Slight shortening required only on one side of each caliper half.I cut the overlap of the uninstalled ring.
Apparently the factory did not use retaining rings on the piston external sealing boot.
After extracting the pistons, I observed a ring of crud on the piston lip (brake pad end) that is covered by the external sealing boot.
This suggests moisture and dust are migrating past the seal.
I purchased the Centric front caliper seal kit to acquire the seal rings.
Perhaps the factory dispensed with seal rings due to the close proximity of the bores will not permit proper nestling of rings around external seal
To resolve the issue, I clipped a short section of two of the 4 rings(each caliper) to eliminate interference.
The Centric rubber components were not of the same quality as OEM....and therefore do not recommend them.
Short section removed from two of the 4 external seal retaining rings.
Image depicts one external seal ring slightly clipped. Unless you perform this operation, the proximity overlap of rings interfere and will not nestle under the seal...and will likely pop out. Slight shortening required only on one side of each caliper half.I cut the overlap of the uninstalled ring.
Last edited by YODAONE; 05-25-19 at 03:43 PM.