From what I've found, and happy to be corrected if otherwise, the casting code, located on the outer face on the left hand panel, printed vertically is in the format 9X2Q-6600-A#, where the # should be the letter B, C, D or E
AC & AD = Weak Casting / 13.5mm thick rotor
AE = Re-enforced Casting / 13.5mm thick rotor
AB = Re-enforced Casting / 15mm thick rotor
From this I would say I need to be looking at fitting a 9X2Q-6600-AB ?
(Is it just me or does anyone else find it strange that the earlier alphanumeric code is supposedly the latest, strongest and most powerful pump??)
I've already approached many of the UK-based LR parts suppliers and many have come back saying that they stock the latest LR supplied part and that it has suffix -AE...which seems to make sense.
There's loads of used ones on eBay and a couple of new -AB ones but none of them seem to come in the OEM (either JLR or PSA) boxes...which I believe are supposed to have hologram stickers as proof of originality. Again, I've asked the eBay sellers about their supposed new pump's provenance, and they generally reply with something about buying in bulk which I find less-than-convincing...
So, if anyone has any idea where to source a genuine FoMoCo -AB version it would be much appreciated?
Cheers,
Andrew.MY06 D3 SE 2.7 V6
MY15 FL2 SE 2.2 I4
Member Since: 28 Aug 2022
Location: South Yorkshire
Posts: 25
Cheers Pete.
As far as I have seen ALL the preceding casting codes are 9X2Q-6600-
I agree. I am definitely NOT going to go cheap but definitely want the thicker rotor version.
The thinking being that the thicker the rotor the more oil is moved per revolution of the pump, leading to faster pressure build up times and less damage to the un-lubricated crank bearings...
I'd be happy to go to Citroen (or indeed JLR), if anyone can confirm they they stock the 9X2Q-6600-AB rather than the 9X2Q-6600-AE, version?MY06 D3 SE 2.7 V6
MY15 FL2 SE 2.2 I4
10th Feb 2023 4:59 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10365
Trouble is LR nore Jaguar use that Casting number to order by.
LR numbers start LR
looking on ebay, 9X2Q-6600-AB seams to be the 3.0 litre, which is what you said
10th Feb 2023 5:06 pm
Breg90
Member Since: 04 Feb 2017
Location: Falkirk
Posts: 348
I ordered a d3 pump from advanced factors last year - it was the 15 mm rotor unitSeries one 1949 - in bits, chassis is strapped to the ceiling in my garage (beside the canoe)
LR 90 - In bits
Disco 3 - currently in bits
10th Feb 2023 10:58 pm
M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8104
Unbeliever wrote:
Cheers Pete.
……….The thinking being that the thicker the rotor the more oil is moved per revolution of the pump, leading to faster pressure build up times and less damage to the un-lubricated crank bearings.……
What makes you think the thicker rotor will pump more than a thinner one?- I would say the thinner rotor will pump more as it takes up less room and gives the pump more volume, I haven’t heard of one of these pumps failing through the rotor failing.It can when others can't,
It will when others won't,
It goes where others don't.
11th Feb 2023 6:36 am
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13649
11th Feb 2023 8:46 am
M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8104
It can when others can't,
It will when others won't,
It goes where others don't.
11th Feb 2023 9:03 am
Unbeliever
Member Since: 28 Aug 2022
Location: South Yorkshire
Posts: 25
@M3DPO & @gstuart
I'm not certain that a thicker rotor will pump more than a thinner one, and am happy to be corrected.
From what I remember from my engineering lectures, the design of the inner pump rotor on a Troch/Geo/Mega/Parachoid profile design generates pressure by rotating the rotor acentrically, this creating a crescent wave of fluid, which is eventually forced through the outlet. The discharge volume is based on the length, depth and width of the crescent. A higher depth, given length and width remain the same, will mean a greater volume is discharged. If a greater volume is discharged, into what essentially is a fixed volume pathway, i.e. the engine oil gallery, then a bloke called Bernoulli proved that a higher pressure will be observed.
I believe this is what the photo above is indicating? The thicker rotor generates a higher pressure given the same time frame. An extra 0.2 bar / 3psi in this case (albeit if you take in the context of the aftermarket FAI pump having poorer tolerances than a FoMoCo OEM one, an LR pump would probably give an even higher pressure reading).
And I'm aware that the pump doesn't fail...at the rotor at least. I'm more concerned with getting a higher oil pressure in a quicker time to my poor, cold, unlubricated main crank bearings... MY06 D3 SE 2.7 V6
MY15 FL2 SE 2.2 I4
11th Feb 2023 11:07 am
ronald.soak
Member Since: 29 Apr 2008
Location: London
Posts: 516
If you are still using the original pump it might pay to get on with replacing it. Whilst you are worrying about higher pressure in the future you are probably suffering from reduced pressure now and risking possible pump failure and engine loss.
If you have already replaced the pump with a strengthened version you can ignore this.
11th Feb 2023 3:16 pm
Breg90
Member Since: 04 Feb 2017
Location: Falkirk
Posts: 348
It’s a positive displacement georotor pump. The think a bit like a gear pump. As the rotor rotates oil is admitted and fills the volume between the pump body and gear. The wider the gear is the bigger the volume admitted.
Hence why a wider/thicker georotor pumps more oil.
Note I suspect the wider georotor is not the only change - I suspect that the relief valve lifts at a higher pressure to force more oil forward.
AdrianSeries one 1949 - in bits, chassis is strapped to the ceiling in my garage (beside the canoe)
LR 90 - In bits
Disco 3 - currently in bits
11th Feb 2023 5:49 pm
Jimbob Arb
Member Since: 13 Oct 2021
Location: Surrey
Posts: 5
'05 TDV6 owner here, 86k miles
Possibly on original pump 🙈
She's on the drive and will find out what number pump i have next week.
Following this thread with great interest as its my next job to do(possibly myself) if not i will find a respect indie.
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