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xu1 brake caliper date codes

Started by _sunburst73-xu1_ , Nov 28 2009 08:50 AM

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#1 _sunburst73-xu1_

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Posted 28 November 2009 - 08:50 AM

Would be keen to here from anyone with an xu1 from 5 month 73 onwoulds to see what date code they have on there brake caliper.Reason being, my car has a date code of 4M2 on one caliper only which I thought was odd but have been told it was not a problem as Holden done big batches of these and what they grabed on the production line was what they grabed.
Just would like to know how late they got.
cheers

#2 dattoman

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Posted 28 November 2009 - 09:53 AM

Bear in mind the same caliper was used on all LC-LJ and HK/T/G
The only difference between XU1 and a stock caliper is the thin spacer between the halves

And the cars are now up to 40 yrs old so plenty of things get changed over time

#3 _sunburst73-xu1_

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Posted 28 November 2009 - 10:01 AM

Yeh I know,but erveything on my car is F3 coded and theses are the only parts on the car that aren't.I know 40 years is a long time but with my car been in storage all that time there is a big chance that they are the originals.

#4 _Ozzie Picker_

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Posted 28 November 2009 - 10:06 AM

i,ve also been studing this as, i have many pairs of calipers from oridginal cars and have noticed that the letter on all pairs is the same but the number different,
eg F3 then F5 then C1 C7 and so on the letters match but the number is always different
the number 5 and 7 didn,t think they would have been manufacturing these calipers in those years.

cheers craig

Edited by 73BATHXU1HTBATH350, 28 November 2009 - 10:06 AM.

#5 _BATHURST-32D_

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Posted 28 November 2009 - 06:49 PM

thats not the only diffrence dattoman, the earlyer ones had knobs on the back of them, and these are the ones with-out full date codes,,,, the full dace coded ones where flat backs

the ones i have hear are

16k2
23k2
11m2
26b3
21e3

these are all original xu1 calipers, i can not say when the change to full date codes took place, but the lc are coded diffrently
the 23k2 are what is on my lonoranger, and this car would be pritty original.

anyway i hope this helps you out dane.
cheers gong

#6 _sunburst73-xu1_

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Posted 29 November 2009 - 07:49 PM

thats not the only diffrence dattoman, the earlyer ones had knobs on the back of them, and these are the ones with-out full date codes,,,, the full dace coded ones where flat backs

the ones i have hear are

16k2
23k2
11m2
26b3
21e3

these are all original xu1 calipers, i can not say when the change to full date codes took place, but the lc are coded diffrently
the 23k2 are what is on my lonoranger, and this car would be pritty original.

anyway i hope this helps you out dane.
cheers gong

Thanks John what do you mean by the ones that had knobs on the back to ones that had flat backs?
Would love to see some pics(differents)
cheers Dane.

#7 dattoman

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Posted 30 November 2009 - 03:26 AM

Posted Image

#8 _sunburst73-xu1_

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Posted 30 November 2009 - 06:47 AM

Posted Image

Cheers

#9 robj

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Posted 03 December 2009 - 08:33 PM

Hi Dane,

I had a quick look at one of mine, it has a code of E3 and then a single F. Its a 9/73 car. and like they say above it does not have that extra knob on the back. When i get the car out, i'll check the other one as i'm curious what it has on it.

/Rob

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#10 _sunburst73-xu1_

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Posted 04 December 2009 - 07:00 PM

Hi Dane,

I had a quick look at one of mine, it has a code of E3 and then a single F. Its a 9/73 car. and like they say above it does not have that extra knob on the back. When i get the car out, i'll check the other one as i'm curious what it has on it.

/Rob

Cheers Rob
Never seen date codes on the Girlock side before,I would be curious too on whats on the other side.
cheers Dane

#11 WhiteA9XS

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Posted 05 December 2009 - 12:37 AM

you could get these on a change over basis through repco and some brake shops years ago , might explain some different date codes .

also the ones with knobs are lc , lj are plain

#12 _pacey1977_

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Posted 06 December 2009 - 12:08 AM

Hi Guys

Are gtr xu1 brake calipers the same as standard lc lj ones as my car has the same calipers as the picture you guys have posted also are the rotor size any bigger on a xu1 as my lc 2 door is fitted with an xu1 front crossmember and all the gear.

#13 dattoman

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Posted 06 December 2009 - 04:49 AM

They are all basically the same pacey

Note the pic I put up
The caliper on the left has a thin spacer between the 2 halves
Thats what the XU1 had so they could fit the thicker disc
Same diameter though

#14 _pacey1977_

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Posted 06 December 2009 - 09:39 PM

thanks mate I will have to take a look at mine cheers

#15 Kockum

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Posted 31 May 2014 - 02:21 PM

Just checked my calipers .

 

Passenger side outer half - E3 and an F .

 

Pass/ inner half - nothing .

 

Drivers side outer half - nothing.

 

Drive/ inner half - 22A3.

 

A spare drivers side XU caliper that I have has no date codes .

 

However there are some numbers and individual letters visible because caliper is not on car.

 

Outer half inner surface - 6432 and an F.

Also has 7956 and a 4 .

 

 

Inner half has a H at one end and a1 at the other .

 

Inner half inner surface - 6432 and a 3.

Also has 7955 .

Yes it is a little confusing without photos . If want some I can post some .

 

There would be other letters/numbers to see if I remove my calipers .

 

Dane , as you have pointed out your car had been in storage for decades so for a 7/73  a 4M2 caliper fits nicely when you consider my car is roughly one month after yours and I have a 22A3 that has never been near any type of bob's  bodgey backyard brake repair emporium business .

 

Ditto for yours too .


#16 frash da bucket

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Posted 31 May 2014 - 04:25 PM

I just had a look at mine,and they are both 8H2.


#17 _LC870_

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Posted 31 May 2014 - 04:41 PM

I  have  been  playing  with  Toranas  for  over  25  years  now  and  have  never  seen  a  1970  date  coded  caliper  eg  G 0 .

Has  any  body  ever  seen  one ?

 

Regards  LC870


#18 frash da bucket

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Posted 31 May 2014 - 08:43 PM

Hi LC8/70,

 

Ask John Gong,he is the one too ask about your calipers and help you.

 

Regards John.


#19 _sunburst73-xu1_

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Posted 31 May 2014 - 08:50 PM

Just checked my calipers .

 

Passenger side outer half - E3 and an F .

 

Pass/ inner half - nothing .

 

Drivers side outer half - nothing.

 

Drive/ inner half - 22A3.

 

A spare drivers side XU caliper that I have has no date codes .

 

However there are some numbers and individual letters visible because caliper is not on car.

 

Outer half inner surface - 6432 and an F.

Also has 7956 and a 4 .

 

 

Inner half has a H at one end and a1 at the other .

 

Inner half inner surface - 6432 and a 3.

Also has 7955 .

Yes it is a little confusing without photos . If want some I can post some .

 

There would be other letters/numbers to see if I remove my calipers .

 

Dane , as you have pointed out your car had been in storage for decades so for a 7/73  a 4M2 caliper fits nicely when you consider my car is roughly one month after yours and I have a 22A3 that has never been near any type of bob's  bodgey backyard brake repair emporium business .

 

Ditto for yours too .

 

 

Hi David

 

Thanks for the update.

 

Here's some pics I had on my computer, I have more on a memory stick of my calipers.

 

Also notice the dorb markings.

 

Thinking about starting a Dorb marking thread.

 

cheers Dane

Attached File  brake cal3.JPG   169.61K   10 downloadsAttached File  brake cal2.JPG   175.71K   11 downloadsAttached File  brake cal1.JPG   173.35K   6 downloads


Edited by sunburst73-xu1, 31 May 2014 - 09:04 PM.

#20 frash da bucket

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Posted 31 May 2014 - 08:56 PM

Hi Dane,

 

The same yellow dots as mine,mine were faded,i just put more yellow on them about 10 years ago.

 

Regards John.


#21 Kockum

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Posted 01 June 2014 - 07:56 AM

Hi Dane, I find it interesting how the caliper dates are well in advance of our respective cars build dates .

 

As for your paint daub thread idea , I say bring it on .


#22 _SableMet7/73_

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Posted 01 June 2014 - 03:37 PM

Glad I saw this, I've never been able to make sense of these codes.

Cant do pics atm, but found these of the paint daubes, uncovered these

when I rebuilt them. 

 

Attached File  YelloDot.jpg   303.89K   4 downloadsAttached File  YelloDotB.jpg   374.2K   2 downloads

 

Numbers, well best I can focus, are

RH outer/external...13..stamped

RH outer/inside....5..&  C or G

RH inner/external...19L1 or 1761

RH inner/inside...5..& 7955/6432

 

LH outer/external....E-2..cast & a 5 cast

LH outer/inside...622...706...75

LH inner/external...D97...&  M or W

LH inner/inside....00

 

Dane, mines  23/7 Adelaide built with some F coded gear also, happy to compare if you want.

 

 


#23 _sunburst73-xu1_

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Posted 02 June 2014 - 07:29 PM

Cheers Jono, always like compairing  with other XU's.

 

cheers Dane


#24 frash da bucket

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Posted 03 June 2014 - 11:19 AM

Hi Jono,

 

They were marked the calipers with a yellow daub at GMH,so when they were on the line,and fitting them up too torana front ends,they would be putting the correct calipers for a xu1 front end,and not to go on a GTR front end at the factory.

 

Regards John.


#25 _SableMet7/73_

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Posted 04 June 2014 - 02:14 PM

Yeah, the daubs & the spacers (genuine I think) tipped me off to being correct

Attached File  100_1820.jpg   214.81K   4 downloads

Mainly wanted to work out the date as to see what else had been replaced on the
left front. I'd found that the lower control arm was swapped for a standard arm
& the top had a significant twist rearward, so a decent hit.

I'll get a PM off Dane.
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