[ECSTuning]

Originally Posted by Yangorang

I ordered ES#2723829 for my 2008 BMW 328xi a while back.
I only got around to installing these recently but I believe I may have received either a defective or incorrect part. If you look at the stock photo closely you'll see that the retaining ring groove is cut right around where the ridged press fit section ends; however, in the parts that I received the retaining ring groove is cut significantly after that section so when installed the retaining ring doesn't really do much of anything. It seems like the part fits otherwise but just the retaining ring groove is machined in the wrong spot somehow.

https://m.imgur.com/JRPnZpq
https://m.imgur.com/HQ6FFO5

I tried emailing ECStuning about this last Friday 3/23 but have not received a response as of yet....

Shoot me a PM with your order number if you still need help. I'm always here to help, that being said, I'm not seeing an issue. The C Clip is not for keeping the bushing hugged up against the caliper, the knurling on the bushing holds it in place. The C-Clip is to prevent any chance of the bushing being able to exit the caliper.



Mistajay - I haven't serviced the ones in my DD for over a year, including in lovely Ohio winters, with zero issues.

Now with HPDEs you should be checking and serving brakes/suspension/etc much more often than standard driving, that's just standard practice. HPDE/Track Days/etc you are working your car far more than standard driving and should be inspecting components for wear after.

-James

[feuer]

Originally Posted by weehe126

Ok then it might be fine. I only bought them since my calipers have 115k miles on them and seem to have uneven wear on the rotor. If they actually need service every 3 months I will be returning them.

Different climate! Quebec vs California. I don't expect that you would need/have to service them every 3 moths. Maybe once a year? Which you should do regardless with brakes.

[Mistajay]

Originally Posted by ECSTuning

Shoot me a PM with your order number if you still need help. I'm always here to help.


Mistajay - I haven't serviced the ones in my DD for over a year, including in lovely Ohio winters, with zero issues.

Now with HPDEs you should be checking and serving brakes/suspension/etc much more often than standard driving, that's just standard practice. HPDE/Track Days/etc you are working your car far more than standard driving and should be inspecting components for wear after.

-James

I know that i do HDPE event for more than 5 years.

And the only thing who give me problem and loosing time was this conversion kit.

For the winter is really crap! If you live at florida and you do maximum 10 000 miles per years it's will be ok.

Me i do arround 30 000 miles per years with winter and it's too much maintenance for the "upgrade'' .... but which upgrade lol? nothing.

[feuer]

Originally Posted by Mistajay

I know that i do HDPE event for more than 5 years.

And the only thing who give me problem and loosing time was this conversion kit.

For the winter is really crap! If you live at florida and you do maximum 10 000 miles per years it's will be ok.

Me i do arround 30 000 miles per years with winter and it's too much maintenance for the "upgrade'' .... but which upgrade lol? nothing.

wow I like how you express yourself. Where do you go for HDPE ? At Mécaglisse?

[Mistajay]

Originally Posted by feuer

wow I like how you express yourself. Where do you go for HDPE ? At Mécaglisse?

Mecaglisse i do it only in the winter.

I past my summer at Mont Tremblant.

I go also to calabogie, mosport, Watkins Glen, Sanair etc...

And sorry for my bad english i try to do my best!

[feuer]

Originally Posted by Mistajay

Mecaglisse i do it only in the winter.

I past my summer at Mont Tremblant.

I go also to calabogie, mosport, Watkins Glen, Sanair etc...

And sorry for my bad english i try to do my best!

Impressive! Your English is good. I like how you express your thoughts "for the "upgrade'' .... but which upgrade lol? nothing."

[Yangorang]

Just a bit of an update - replacement parts are on their way to me thanks to James. I guess with the part redesign the retaining ring groove on the parts I had received were actually exactly where they were intended to be, but i went and hammered them out since they didn't match the online images which hadn't been updated yet.

Once I get them installed (again...) I'll try to get some images of what their condition looks like at the next oil change. With the relatively well sealed design of this part I imagine with street driving these should last maybe a good 7500 miles or so between regreasings. I look forward to never having to replace a rubber guide pin bushing ever again.

[weehe126]

Did they say why it was redesigned this way? I got mine and will need to compare to the stock part.

[Julian2485]

Originally Posted by Yangorang

Just a bit of an update - replacement parts are on their way to me thanks to James. I guess with the part redesign the retaining ring groove on the parts I had received were actually exactly where they were intended to be, but i went and hammered them out since they didn't match the online images which hadn't been updated yet.

Once I get them installed (again...) I'll try to get some images of what their condition looks like at the next oil change. With the relatively well sealed design of this part I imagine with street driving these should last maybe a good 7500 miles or so between regreasings. I look forward to never having to replace a rubber guide pin bushing ever again.

I just installed these on my car i didn't know they have to be regreased

[Yangorang]

Originally Posted by weehe126

Did they say why it was redesigned this way? I got mine and will need to compare to the stock part.

I honestly don't really get it either. I plan to use some retaining compound to add additional holding force as it seems like the C clip is just there as a final defense.

[Yangorang]

Originally Posted by Julian2485

I just installed these on my car i didn't know they have to be regreased

All solid bushings will need re-greasing eventually unless you want to wait around until the day the guide pins are just completely stuck in there.

[Mistajay]

Originally Posted by Yangorang

All solid bushings will need re-greasing eventually unless you want to wait around until the day the guide pins are just completely stuck in there.

Mine was really stuck some times. Use big tool and use your arm.

But you need to do the maintenance regularly.

[Julian2485]

Originally Posted by Yangorang

All solid bushings will need re-greasing eventually unless you want to wait around until the day the guide pins are just completely stuck in there.

Did you know a difference when you installed these ?

[mweisdorfer]

Use this, it's the very best grease for brakes I have ever used. Probably once a year is good, unless you live in a hot climate.

https://www.amazon.com/CRC-05361-Sil.../dp/B0091KCG0W

[ajsmithvmi]

I received some of these recently and when I went to install them, they pressed in by hand and fell out when you turned the caliper upside down. The knurling did nothing as there was zero interference.

So, to anyone installing these, I recommend that you test fit one before removing all 4 of the OE rubber bushings. I had to reinsert all 4 of the rubber bushings.

[Julian2485]

Originally Posted by ajsmithvmi

I received some of these recently and when I went to install them, they pressed in by hand and fell out when you turned the caliper upside down. The knurling did nothing as there was zero interference.

So, to anyone installing these, I recommend that you test fit one before removing all 4 of the OE rubber bushings. I had to reinsert all 4 of the rubber bushings.

Sorry to hear that i installed it with no problems the front one slid in by hand but the rear ones need a c clamp to install

[Yangorang]

I got these installed without too much drama. I used Permatex sleeve retainer to increase holding strength and cleaned the bores using a rotary wire brush from the Dremel 3000 kit. Greased everything using CRC Silaramic. The ECStuning tool kit is easy and convenient to use - much easier than a C-clamp in my opinion.

Not too much difference in pedal feel to be honest. The biggest difference I noticed was actually just how much quieter my braking was, but that could just be mostly from re-greasing everything. I'll inspect everything at the next oil change and post some pictures of the condition so we can get an idea of service life.

Seems like a pretty good design overall - the only feedback I have is:
-end cap feels like it could loosen and fall off over time; it would be better if there was another groove to help retain the cap somehow
-the OE design has channels internally perhaps to serve as a reservoir for grease and debris over time; having something similar would help in extending service life
-can we get individual parts or the dimensions for the o-ring? probably should be replacing those along with new pads

[Yangorang]

I took a look at everything after being installed for 7500 miles. Didn't even seem worn or dirty at all. Probably could last the entire CBS oil change cycle or longer. None of the bushings backed out at all and everything has been working great.