| VT - VX Holden Commodore (1997 - 2002) Talk about anything relating to the VT - VX Holden Commodore. |
22-02-2008, 10:35 PM
|
|
|
|
Ride: VT Series 1 V6
Join Date: Jan 2008
Posts: 87
|
|
caliper bolts
Hi all,
I'm in the process of refurbishing a set of SS calipers to put on my exec. My Haines manual states that the caliper bolts on the car are "self locking" and designed to be used only once and when removed they must be replaced.
Does anyone know the reason for this? Are replacements freely available or do they need to be sourced from Holden?
Normally, I wouldn't have even thought about replacing bolts.
Thanks!!
|
22-02-2008, 11:59 PM
|
 |
not for human consumption
|
|
Ride: VR EXEC
Join Date: Dec 2005
Posts: 1,208
|
|
reason they're single use? I'd say just to cover their bums regarding backyard mechanics using dodgy parts. after all, brakes are IMO the most important safety feature of ANY car. finding replacements should be simple, just take an old bolt to a bolt shop and get one same thread. holden should keep some in stock too. might be more expensive, but certainly easier
|
23-02-2008, 06:56 AM
|
 |
Donating Member
|
|
Ride: WH II Caprice, 5.7
Join Date: Jun 2005
Location: Eschol Park, Sydney
Posts: 2,334
|
|
I always re-use the bolts, just put some loctite or similar on the thread.
|
23-02-2008, 09:00 AM
|
|
|
|
Ride: VY SII HBD Calais L67
Join Date: Dec 2006
Posts: 429
|
|
It is a stretching bolt. These are to be used once because once they are tensioned and then that tension is released their structure is changed. These are brakes fellas! These 2 bolts are soley responsible for holding the caliper to the hub ffs. Use loctite?
They will set you back about $4each from Holden and come with the loctite applied. They are a readily available item.
|
23-02-2008, 09:18 AM
|
|
Donating Member
|
|
Ride: WH II Caprice, 5.7
Join Date: Jun 2005
Location: Eschol Park, Sydney
Posts: 2,334
|
|
Quote:
Originally Posted by chargedvx6
It is a stretching bolt. These are to be used once because once they are tensioned and then that tension is released their structure is changed. These are brakes fellas! These 2 bolts are soley responsible for holding the caliper to the hub ffs. Use loctite?
They will set you back about $4each from Holden and come with the loctite applied. They are a readily available item.
|
I've been doing it this way since before replacing the bolts was heard of, about 35 years and not once has there even been a hint of a problem. It has nothing to do with the cost of the bolts.
|
23-02-2008, 09:50 AM
|
|
|
|
Ride: VT Series 1 V6
Join Date: Jan 2008
Posts: 87
|
|
cheers for the info. I'll replace them as this will be the first time I've had the calipers off. Oddly enough though, I had the front rotors changed about 2 years ago at a brake place in the ACT and they didn't put new bolts on.
|
23-02-2008, 11:25 AM
|
|
|
|
Ride: VY SII HBD Calais L67
Join Date: Dec 2006
Posts: 429
|
|
The way I look at it is.....you r saving at least $200 by DIY so another $16 for 4 new caliper bolts is justified.
Workshops are big on reusing bolts where they can but a stretching bolt only really stretches once  The next time it stretches is called breaking 
|
23-02-2008, 11:32 PM
|
 |
I gotta V8 whoot whoot
|
|
Ride: VX 02 SS LS1
Join Date: Dec 2005
Location: Armidale
Posts: 574
|
|
So the same could be said for wheel studs and wheel nuts....... how many people replace them everytime..  :rolleyes :
I think not as said above i have been using the same bolts on brakes for the last 12 yrs working on cars and never a problem......
Its all talk and bs
|
24-02-2008, 12:46 PM
|
|
|
|
Ride: VY SII HBD Calais L67
Join Date: Dec 2006
Posts: 429
|
|
Quote:
Originally Posted by BOGANV8
So the same could be said for wheel studs and wheel nuts....... how many people replace them everytime.. :rolleyes :
I think not as said above i have been using the same bolts on brakes for the last 12 yrs working on cars and never a problem......
Its all talk and bs |
Especially your post 
|
24-02-2008, 05:00 PM
|
|
|
|
Ride: vx berlina
Join Date: Oct 2006
Posts: 38
|
|
ive always reused the bolts in thirthy years off playing with cars and bikes not a problem, as long as you torque them up.  but one thing i do is put new head bolts in every head i do
|
24-02-2008, 05:59 PM
|
 |
|
|
Ride: MY08 Outlander XLS
Join Date: Aug 2006
Location: Bunbury, WA
Posts: 4,354
|
|
The reason they are self locking is because the genuine bolt has the thread locking compound already applied. The amount of torque applied to the bolt is not enough to stretch it beyond it's tolerance.
__________________
It is better to be silent and thought a fool than to open your mouth and prove it.
Quote:
Originally Posted by DannyboyDS
I burnt my hand in a nasty way once using method one but thats because i'm a twat.
|
Wholesaler of exhaust, suspension and brakes.
|
24-02-2008, 07:51 PM
|
|
Donating Member
|
|
Ride: WH II Caprice, 5.7
Join Date: Jun 2005
Location: Eschol Park, Sydney
Posts: 2,334
|
|
Quote:
Originally Posted by Not_An_Abba_Fan
The reason they are self locking is because the genuine bolt has the thread locking compound already applied. The amount of torque applied to the bolt is not enough to stretch it beyond it's tolerance.
|
That's what I thought and that's why I re-use the bolts and apply loctite to the thread.
|
24-02-2008, 08:07 PM
|
 |
Gas Sleeper
|
|
Ride: VX S2 Berlina Wagon
Join Date: Jun 2006
Location: North Coast , NSW
Posts: 950
|
|
Quote:
Originally Posted by chargedvx6
The way I look at it is.....you r saving at least $200 by DIY so another $16 for 4 new caliper bolts is justified.
Workshops are big on reusing bolts where they can but a stretching bolt only really stretches once The next time it stretches is called breaking |
So chargedvx6, how far will the bolt stretch before it breaks?
__________________
 I like my roo well done |
24-02-2008, 08:35 PM
|
|
|
|
Ride: VY SII HBD Calais L67
Join Date: Dec 2006
Posts: 429
| | | |
