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[EMD]

So i ordered a rear brake pad fitting kit for vented discs as i was told on here
that the GM kit i had would not fit . Vented kit came today and comparing both kits , the
GM ones that i was told were wrong have longer pins and bigger springs so which set is correct   

[Diamond Black Geezer]

If I've read it right you have purchased aftermarket and GM pins? As I understand it, and aftermarket jobbies are always and only the shorter, standard pins, and smaller spring. The GM ones can be, of course, the shorter, smaller caliper, or the longer pins.


If the aftermarkets and the GMs are the same length that's either ...

Vx have sold you the wrong ones, or

You've found a source aftermarket longer pins, brand new. 

[EMD]

Ones i ordered are aftermarket and have shorter pins and smaller springs but they are listed as for vented discs .

So have i been sent the wrong size kit 

[Diamond Black Geezer]

Ah, then you have followed in the doomed footsteps of so many poor OOFers before you...

plenty, if not most sites list the pins for vented discs, but they always send the wrong ones, the shorter. Their records are wrong, and you'll complain, they'll say something like 'we're terribly sorry for the mistake, we'll send you the right ones'. Then a day later you'll have a message back saying 'we don't have these longer ones you speak of in stock, our records show we have sent you the right ones. Our technical team suggest your car has been modified in some way' or words to that effect. You therefore may or may not get a refund.

Aftermarkets are always wrong, sadly. 

[05omegav6]

So i ordered a rear brake pad fitting kit for vented discs as i was told on here
that the GM kit i had would not fit . Vented kit came today and comparing both kits , the
GM ones that i was told were wrong have longer pins and bigger springs so which set is correct   

If they are this size they are for vented rear disc...



Any other size and they are wrong and not vented.

[EMD]

So what's wrong with the longer GM pins and bigger springs ?

[EMD]

Going by those measurements the GM ones i have , the springs are right but my pins
measure 75cm  As expected they sent the wrong kit 

[Diamond Black Geezer]

sadly its not dissimilar to the crank sensor issue - seems silly expensive for genuine GM, but aftermarket just does't do it. 

Used ones are of course out there at breakers, but you're clearly trying to do a decent job and use brand new where possible. Used ones of course could be as bad/wose than your existing ones. And that's me talking, and I will use hand food if it's cheap! 

[EMD]

Best get on the phone then and get my £8 back 
So only usable bits in the GM kit are the pads and springs .. maybe backing plates 

[Diamond Black Geezer]

So the GM kit you have has shorter pins, correct? if so, then yes, sadly it's back to Vx and get the longer pins. 

[05omegav6]

Ones i ordered are aftermarket and have shorter pins and smaller springs but they are listed as for vented discs .

So have i been sent the wrong size kit 

Not like that hasn't been covered to death

See above for accuracy

Your springs are also wrong if you bought them via ebay for 9.99-14.99 and reasonably locally...

Only solution is to buy vented pins  and springs from local dealer

There isn't a single pattern kit which actually fits the Omegas vented caliper.

The end.

[Nick W]

To save me dismantling my car, what are the diameters of the pins?
If the large diameter is a stock size then you could file the small end, and have two new pins in less time than you've spent reading this thread. For pennies. A more precise part would require a few seconds of lathe work, as would making the groove for the spring.


This sort of thing isn't difficult or complicated. Don't make it so!

[EMD]

So the GM kit you have has shorter pins, correct? if so, then yes, sadly it's back to Vx and get the longer pins. 

Yep shorter than in the pic , the kit was a GM kit listed for Carlton senator omega 
Ill know next time but its just the pins needed . Have we got part number for correct vented pins .

[05omegav6]

If the Vauxhall dealer has screwed up, give them some stick... They have absolutely no excuse for supplying incorrect parts.

[EMD]

GM springs  measure the same as in the picture in this kit i originally had .