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Cervelo s5 Pressfit

Posted: Sun Jun 17, 2018 6:40 pm
by Cyppen
Just bought a cervelo s5 with bbright.

I have a DA SRM so i Got a net BB Press fit bearing.
Everytime i riding the Pressfit cup losing from the Frame in the drive side.

Should i use locktite?
Or get a new pressfit bearing?

Re: Cervelo s5 Pressfit

Posted: Sun Jun 17, 2018 7:01 pm
by wingguy
Yes you should be using locktite. I would also check you've put the crank together properly. Correct me if I'm wrong but while an imperfectly fitted PF bearing will creak, the preload from the crank shouldn't permit it to migrate loose in the frame no matter how poor the bearing fit is :noidea:

Re: Cervelo s5 Pressfit

Posted: Sun Jun 17, 2018 7:01 pm
by Weenie

Re: Cervelo s5 Pressfit

Posted: Sun Jun 17, 2018 8:06 pm
by kode54
use the Loctite 609.. its red.

Re: Cervelo s5 Pressfit

Posted: Mon Jun 18, 2018 9:07 am
by 1415chris
You would also need a primer 7649.
But honestly I would scrap these plastic cups and replace them with aluminium screwed-together bottom bracket.

Re: Cervelo s5 Pressfit

Posted: Mon Jun 18, 2018 12:35 pm
by hambini
I would use 7649 and medium strength 641 retaining compound.

Some of the red loctites (number not specified) will trash the carbon.

I've got an S5 and I found there was quite a bit of misalignment between the left and right sides which caused the creaking.

Re: Cervelo s5 Pressfit

Posted: Mon Jun 18, 2018 1:50 pm
by Geoff
I am running a similar set-up. I have not been able to solve that issue with a solution that lasts. I am thinking of going to a threaded BB solution now.

Re: Cervelo s5 Pressfit

Posted: Mon Jun 18, 2018 3:02 pm
by 1415chris
hambini wrote:I would use 7649 and medium strength 641 retaining compound.

Some of the red loctites (number not specified) will trash the carbon.

I've got an S5 and I found there was quite a bit of misalignment between the left and right sides which caused the creaking.
This is what I was suspecting with my S5 when after short period of time two bearings (oryginal Rotor and Enduro replacement) on NDS started grinding.
After swaping plastic cups for aluminium threaded-together bb (Wheels mfg) similar thing happened with Enduro angular bearing, this time on DS :)
I gave up on Enduro bearings, went for NTN LLB ultra low friction seal bearings (from hambini). So far so good.
Having said all that, for number of years I didn't have any issues using plastic Sram bb-right bb on R5.

Re: Cervelo s5 Pressfit

Posted: Mon Jun 18, 2018 3:02 pm
by Weenie