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engine cast numbers

hi, can anyone tell me the year of my 253 red.the numbers on the block are 253H7153.cheers.

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The 253H prefixed engines were used in the HT and HG models so that gives a rough date range.

You can actually find the exact day on which that engine was cast by finding the date code on the engine block.

This will be located on the very top front of the engine block near where the water pump bolts on (just forward of the front edge of the inlet manifold).

It will be a 3 or 4 digit code consisting of several numbers and at least one letter. There will also be a little clock symbol just near it. This clock actually signifies the exact time of day that the block was cast.

Post that code here and we can decipher it for you or you can email me direct.

Darren

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cheers mate,the numbers are H 59.

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August 5, 1969...

Cheers...Dave

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thanks heaps mate...dean

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cast date 28bz hi mate do u know what this means

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can anyone tell me the best way to go about getting 300hp out of my 253.thanks

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NITROUS is the easiest way.
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hi, i am trying to find out the specs on a camshaft i pulled out of a red 253.the numbers on it are 942059 , 2600 , 14 i4(looks like i4 but could be 14), d2 c2 ,1.5 cwc. Or if anyone knows of website i can check out,cheers

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has anyone out there have a torana v8 diff for sale.cheers,Dean.

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Hi Guys,
I'm restoring a 1973 HQ 4 monaro (built in may 1973). I need to find a the correct 253 pre-pollution enigne with 185 bhp. I know it should start with QR, but my question is from what range does the 185bhp engine QRXXXX start and finish and engine cast date (With the clock on the side with 2-3numbers followed by letter than 2-3 numbers? As I stuffed up and bought a HZ 253 instead which is a 8L6 (cast date) and engine QR816070. Can someone please explain how does the 8L6 (cast date)works, it's driving me up the wall trying to work it out.. I hope someone can help me out and do it right.. Thnx guys.. Mexican

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8L6 is 8th Nov 76 so would be a HX engine and is almost in the date range I am looking for as I have a March 77 HX. It's probably 2 mths too early for me.

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Casting dates are very simple to decode

The first on or two letters are the day of the month.

The letter is the month
A=Jan
B=Feb
C=Mar

I is not used so H=Aug then J=Sep

The last number is the year. 2=72, 3=72 etc

Earlier blocks (which have a different prefix on the engine number [253H]) will have the month before the day in the date code.

Later blocks such as 82, 83 etc can be distinguised from 72, 73 by having 4.2 cast on the side instead of 253.

There are also other differences as well but that is a very simple one.

When looking for a suitable block for a restoration try and find one that was cast somewhere between 1 and 4 months before the build date of the car as that is usually the way things worked out on the production line.

Hope that helps

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Is there a site I can go to, to view 253 engine numbers?
I would like to know what the very 1st engine numbers may have been. I know they had an H. Was there a sequential set of numbers used?
I need to source one of the earliest 253 engines.
rgds
"253 nut"

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what model car you have will decide which early engine numbers you want tell us that and we may be able to help. As HT has a different numbering system to HQ on
Leroy

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the block number is hr45264

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HR45264 is an LH engine not sure when it was made though

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Hi,

I've been looking for the engine number, I found this one near where the head bolts on/alternator on the passenger side. Would this be it: 253h5466
or is that something else? Most of the engine numbers ive seen are different format to that so im not sure?

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Yep, that'd be it. The block is out of an HT or HG Model.

Cheers...Dave

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can any one help me with number on my 253 the engine number is QR889298

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QR889298 is around Aug/Sept 77

Leroy

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Hi i have a 308 and was just wondering what car it was out of or year?? the date code is C252 cheers

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C252 deciphers as 25th March 1972 (assuming it is a red motor). What's the engine prefix?

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mate doing up a 1972 hq and need a motor like yours. would u been keen to sell it? i have a good running 1974 motor and also a fresh rebuilt 308 short motor. let me know brian 0422319911

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can any one help me with number on my 253 the engine number is QR876262

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QR 876262 is from around a mid 1977 vehicle so a late HX model engine.
If you post the date code that is on the the front of the block just near where the temp sender unit is on the valley.
A exact date can be given as to when the engine was cast.
Cheers Paul.

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Thanks Paul
date code 27f7 = 27june1977 ? . on the heads 26k6 under the rocker cover is this a date code . my 253 is a motor off ebay sold as a blue motor reconditioned yes it is painted blue it is reconditioned recon 1993 stamped on the head it has been in storage never installed i will replace all gaskets pulled the heads off today & it is like new inside new pistons 0030 oversize paid $500

cheers adam

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Hi Adam.
Yes 27F7 is a 27th of June 1977 cast block, so as I said a very late HX engine or a very faint chance that it could have hung around and been a very early HZ engine.
Also correct on the heads that's the date code.
26K6 are 26th of October 1976 cast heads.
Cheers Paul.

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hi there can anyone help my engine number is HR 26224i thinks that's the one at least that's whats on the rego papers. i'm doing up my engine slowly but surely and would be greatly appreciated if anyone could help with some pointers on where to start
thanks Jamie

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hi there can anyone help my engine number is HR 26224 there is another number located near that one which is 2815889......................... i'm doing up my engine slowly but surely and would be greatly appreciated if anyone could help with some pointers on where to start. but first i need to know what car it's out of
thanks Jamie

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Cheers...Dave

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hi thanks for that but i'm unsure as to what i'm looking at. does it meam it comes out of a LH/LX torana. please advise. thanks again for your help.

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That's what that site says for an HR prefixed 253...

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hi i recently got a 308 engine number H 115224 can anyone tell me a story about it, thanks,
its painted blue and i thought it was a blue motor,
not to familar with were to find the date code , is it by the water pump,
thanks liswar

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hi, can anyone help. wondering if this is the original engine for my hq, QR415601, Cheers AJ.

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Hi,
Can anyone help. I have a red 253 with the engine number as ZR 1824.

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Its from a Dec 78 HZ

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My 186 has engine number 186A115289, so presumaly it's out of a HR holden. There is also "F300" on it which is presumably the date code. Can anyone tell me when it was made?
Thanks
Scott

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h i there i have 2 red v8 blocks with the date codes 8 j 7 and one with 17m6 can you tell me what they are out of cheers paul

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8 J 7 = 8th of September 1977

17 M 6 = 17 of December 1976

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Could anyone tell me what colour paint code 585 - 0152 is
It is a Dulon solid prefix according to searches I have done
It is off an EJ standard and has been changed from standard

I have seached the internet and found some detailed lists but this code is not listed

Trim code I could not find either, 925 - A97

Any info appreciated

Regards
Terry

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925 and 0152 are NSW Ambulance Cream which is obviously a fleet colour
A97 is Triton Green

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Thanks for the info Mr Jones

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Qr543645

Can anyone decode thise one for me please?

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HR75955 anyone know?

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whats mine 0R226284

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I would like to know what my 253 came out of..253h14602.

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ht holden

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17K3 guys anyone know what it's out of and month and year, cheers Larry

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Can someone help i have a gen hq ss with a 253 witch engine number matches car built 11/72 but the casting number says 22/7/71 is this right?

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Trying to ID my 308, /F9 7 QT13323 its in a 79 sandman

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F9 7 you sure it's not F9 2 which would be June 9th 1972

engine number looks real low HQ at QT 13323

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its either a 1 or 7 but didn't think they used a 1,, more like a 1 though

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1 would be 1971 and works with the low engine number...

they didn't use i in the codes

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Hi, I have a 308 that came out of a 74 HQ Statesman, I think the engine (going by the stamp) was made at 6:30 on 11th February 1974, could you tell me if this sound right? Picture added, any help would be greatly appreciated

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Image icon v8Numbers.jpg486.12 KB
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if the engine number starts with 11QT should be out of a HQ Statesman...........

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Hi,

I have had this 253 for 30 years. I took it out of a HK Monaro.
The Engine Number is: 253H1860. The Build Number is:J48. I am think September 4 1968 and a very early 253. How it ended up in this HK, I don't know.

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Image icon IMG_20180206_213550.jpg3.55 MB
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That would be very early....
the first V8 finished was on the 15th October 1968

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Hi and thanks for the reply. I just thought I'd add the Build Date photo for my 253, J48 to make sure I've dated it right.

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bit hard to read ....
but zoomed in it looks correct as J48

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hi I have a 308 just wondering whot it came out of 11QI631132 the forth later in I not to shore if it is a I or a t 26B5 and W is on the other side

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hi I have a 308 just wondering whot it came out of 11QI631132 the forth later in I not to shore if it is a I or a t 26B5 and W is on the other side

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and aligns to HQ and late HZ Statesman according to this ref
https://www.uniqueca...

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Andrew

how rare is it for a compliance plate to be missing the engine code stamped into it.

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