180 replies to this topic

[LJ RB30]

Probably by the cast date lol

Still doesn't explain why there is apparently the need for 2 cast dates!

But I have no idea

[S pack]

Dave this doesn't make sense to me...  if it is the case, how did/do they identify multiple changes, or changes made after the motors were cast....??

 

Engine numbers are there to identify a motor ....   as everyone is doing here...  if a change to a particular batch off motors came out, and required modification at the dealers for warranty ect...   the engine numbers between XX31000 and XX3999 would identify these as the specific motors, wouldn't they ...

 

To my way of thinking, Cast identification marks would only be there for company quality control, and serve little if nothing in determining what is in or goes into the motor..  ??  

Notifying the Servicing Dealers about a trial or revised component is not about asking the dealers to do any modifications under warranty but merely to report on any problems, if any, with the component.

 

GM-H employed various methods for identification eg: vehicles within a set VIN number range or engine or transmission numbers or daubs of paint or manufacture dates or a physical description of the component just to name a few.  

 

Yes it is about QA, both before and after sales.

Edited by S pack, 05 March 2016 - 12:50 PM.

[dattoman]

Bill worked for Holden in 1973

Bill was a specialist casting man with slight vision problems

Bill forgot to notice the extra casting dies still in place

Due to Bills new wife having a baby in June 1973 he was taking some time off July so had to work a few night shifts to get some extra cash for the upcoming baby

Bill worked Wednesday nights while his wife went to antenatal classes

 

Its all Bills fault

[S pack]

ODDLY ENOUGH : GMH homologated fly cuts at the top of the bore tops under homologation 9/2E

 

ODDLY ENOUGH : GMH added extra iron at the top of the bore to allow the fly cuts as fly cuts would weaken a normal block some what

Did they thicken the deck down into the water jackets or add material onto the deck (raised the deck height)?

[UCgazman]

Friggen Bill....

[FLY_AGAIN_XU-1]

GMH cast 200 Dual Cast 202 blocks for one months production, but only required 80.

 

What happens to the other 120 Dual Cast 202 blocks ?

[crabba67]

Ian,A dual cast block JP397912 NO PAINT.

Cheers

Attached Files

•  jp3979##.jpg   270.76K   25 downloads
•  jp3979## 1.jpg   269.05K   10 downloads
•  jp3979## 2.jpg   191.44K   11 downloads
•  jp3979## 3.jpg   175.38K   17 downloads

[crabba67]

My car at the All Holden Day Geelong someone from the club there all day waiting for forum members bonnet and boot open like always.

Cheers

Attached Files

•  my car geelong all holden day 2016.jpg   316.18K   8 downloads

[N/A-PWR]

Funny you say that Ian,

 

but Adam's thread on 'how to spot a restamp' cannot get the photo's either.

 

So that means, you have to word the next thread with Emotion Mate. 

 

Hmmmm ............................................................................................  ODDLY ENOUGH ...  still no photo's ..                                     Bet if i started a thread asking for Single Cast Date JP block's photo's we'd have half a dozen in the first hour .....   And why...... maybe because they exist in the real world ...  just saying... 

Long live the Dual Date Code

[yel327]

Ian,A dual cast block JP397912 NO PAINT.

Cheers

 

That would be 397912?

[frash da bucket]

Hi Ian,

 

I have a dual cast block in my LJ XU-1,My original block was JP2168..

I have a NP block,with a Dual cast date off 7H3.. NP74..R.

Ask Dane from the hunter valley torana club,I showed it to him,a few years ago.

 

Regards John.

[crabba67]

More dual cast in order JP38665#,JP38666# perth car cyan blue was for sale on ebay.JP3744##.A number of forum members have dual cast blocks in there 73 7,8,9 month xu1,s and even early xu1,s after buying the blocks for their cars. Adelaide built for example we have the first xu1 on the 150 engine list in the middle and the highest chassis xu1 the joe kenwight xu1 8H3.

Cheers

Attached Files

•  jp386656 1.jpg   58.52K   11 downloads
•  jp386 3.jpg   153.54K   3 downloads
•  jp386 4.jpg   151.32K   2 downloads
•  jp3744.jpg   288.37K   5 downloads
•  jp3744 1.jpg   169.39K   4 downloads

[crabba67]

missed one...................................only photo i have is dual cast 4G3 

Cheers

Attached Files

•  jp 3866.jpg   151.84K   4 downloads

[yel327]

JP386656 or 386658.

 

JP3744xx isn't a 150 list engine so really is no more proof than a JL or a QL or a QD or CD or whatever.

 

JP386662, 8 or 9 (probably JP386662).

 

Funny how these almost always seem to be Elizabeth installed engine numbers. All the original 150 list numbers I've seen with a single cast date are from Acacia Ridge vehicles.

[crabba67]

Byron,i have Brisbane built one's but forum members can put them up not my blocks, the JP3744## was pat cullen white 7 month 73 race car but he built his own engine or used his previous xu1 engine JP3744## has the same internals has the 150 listed engines.

Cheers 

[xu2308]

My thinking is the JP Donks with the Dual Cast Dates on said 150 List (Engine only list). Could them dual cast JP batch, be made out of the Graphite stronger metal that is lighter than the norm and a stronger metal.

Harry used to get things made out of that Graphite stuff by GMH Metallurgists,  Just Saying.

[N/A-PWR]

Now we need to weigh the dual cast blocks Al Mate. 

[xu2308]

Just some more Drama to this lol

[yel327]

My thinking is the JP Donks with the Dual Cast Dates on said 150 List (Engine only list). Could them dual cast JP batch, be made out of the Graphite stronger metal that is lighter than the norm and a stronger metal.

Harry used to get things made out of that Graphite stuff by GMH Metallurgists,  Just Saying.

 

If anything i'd say it is the other way around - the normal casting blocks with single date codes would be different, given the amount of those with dual date codes left around today including on HQ 202, on 173/2850 and probably also on export 138 they are way too common to be anything special in such limited amounts. Assuming Al you are talking about HDT getting some special, special blocks cast using the same iron and same low volume stuff they did a few months earlier for the Repco-Holden V8 bocks. As a guess there would be 1000's of them (as in second date coded 6's)  by how many seem to be still around today, which is consistent with the component trial happening  at the time these blocks were in cars.
 

Edited by yel327, 05 March 2016 - 07:25 PM.

[yel327]

Byron,i have Brisbane built one's but forum members can put them up not my blocks, the JP3744## was pat cullen white 7 month 73 race car but he built his own engine or used his previous xu1 engine JP3744## has the same internals has the 150 listed engines.

Cheers 

 

That's OK, doesn't mean all Elizabeth or all Acacia Ridge would be the same as each other. It is a damn big co-incidence though.

 

I'm sure there were a lot of older XU1 engines upgraded to the final spec engines at the time using over the counter bits, not surprising at all that this one was done. 
 

[xu2308]

Well my thinking is for these said Engine on that 150 Engine List, as a lot went into Cop Cars so the Stories go and Coppers didn't drive them like Miss Daisy, my thinking is to make them stronger, I might be way off but just thinking it.