Caliper nipple
stranger12
Posts: 558 Forumite
Hi all
I changed my caliper to evo 9 and 350 disc in dec
One of the calipers was leaking from piston so took it off and rebuilt it today
Car was off road for 6 month plus and caliper was in a box
When i was rebuilding today, i opened the two bleed nipples and noticed the thread coming off with it
Did some googling and think it is to do with galvanised rust( sorry if that is not the right term)
Bottom line is, it is leaking and can't put the nipples back
It is an m10 x 1.0 so bought both helicoil and tap and die for it
I want to try and tap it first and if that fails then drill next size up and helicoil
Question i have is, if existing thread is gone, is there any chance the tap works?
I guess if there is no metal then it can't tap or re create the thread
I then thought of taking it to someone to weld it and drill it again but not sure if they will up the bleed hole or not
What would you do ?
I am so angry and annoyed and think the issue happened due to no brake fluid been there so the bolt freezed
I changed my caliper to evo 9 and 350 disc in dec
One of the calipers was leaking from piston so took it off and rebuilt it today
Car was off road for 6 month plus and caliper was in a box
When i was rebuilding today, i opened the two bleed nipples and noticed the thread coming off with it
Did some googling and think it is to do with galvanised rust( sorry if that is not the right term)
Bottom line is, it is leaking and can't put the nipples back
It is an m10 x 1.0 so bought both helicoil and tap and die for it
I want to try and tap it first and if that fails then drill next size up and helicoil
Question i have is, if existing thread is gone, is there any chance the tap works?
I guess if there is no metal then it can't tap or re create the thread
I then thought of taking it to someone to weld it and drill it again but not sure if they will up the bleed hole or not
What would you do ?
I am so angry and annoyed and think the issue happened due to no brake fluid been there so the bolt freezed
0
Comments
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I think the typo is evidence of your issue. Hope stripped for the caliper. As you have guessed you cannot tap what isn't there and going to a bigger size would require redrilling and they you would need to get the right sized bleed nipple to fix.
Can you trade in your caliper for a professional rebuilt one?0 -
Is there a machinery service or professional people who can weld the hole and re drill it?
I am refering to fabricators0 -
If drilled and helicoiled or rethreaded, the new thread would have to be extremely accurately square with the tapered seal inside the hole, or itll never seal, plus any swarf left behind would stop the seal working and/or find its way to the piston.“I may not agree with you, but I will defend to the death your right to make an a** of yourself.”
<><><><><><><><><<><><><><><><><><><><><><> Don't forget to like and subscribe \/ \/ \/0 -
I had the same problem as you.
The issue occurs usually on rear calipers as they're made from alloy and the bleed nipples are steel so the two metals combined creates galvanic corrosion.
I replaced the caliper as anything else wasn't worth the headache.All your base are belong to us.0 -
stranger12 wrote: »I want to try and tap it first and if that fails then drill next size up and helicoil
This is the right way forward.Question i have is, if existing thread is gone, is there any chance the tap works?
That's when you would drill and retap to M12.I ... think the issue happened due to no brake fluid been there so the bolt freezed
Nope. The thread shouldn't be in contact with fluid anyway, so it'd make no difference. The seal is made by the tip of the nip in contact with the seat, below the thread.
Were these calipers new, reconditioned, used?0 -
It was used caliper
Question is , do fabricators weld and redrill?
I don't want to heli coil it
Also if you helicoil then the nipple may not sit in the right place and hence no seal0 -
stranger12 wrote: »It was used caliper
Question is , do fabricators weld and redrill?
I don't want to heli coil it
Also if you helicoil then the nipple may not sit in the right place and hence no seal0 -
Seems like only option if i can't get a fabricator to weld and drill
They aren't cheap at £300 a caliper ( second hand) or £1000 brand new
It is for 350mm disc brembo!0 -
stranger12 wrote: »Seems like only option if i can't get a fabricator to weld and drill
They aren't cheap at £300 a caliper ( second hand) or £1000 brand new
It is for 350mm disc brembo!
I very much doubt it'll cost £700 to get one caliper rebuilt, though. Talk to somebody like BigRedd.0 -
When people say rebuild, they are normally refering to seal kit
That is done but my issue is bleeder nipple0
This discussion has been closed.
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