Hi Guys.
Many parts catalogues don�t list these pumps properly.
There are actually 4 different water pumps for the Holden 6.
1. EH to HK (small hub & short shaft) this has the common industry part no. of W587
2. HT to HZ/VB & LC to UC Without viscous fan clutch (large hub & short shaft) part no. W726
3. HJ to HZ/VB & LC to UC With viscous fan clutch (large hub & long shaft) part no. W814
4. WB/VC to VK Large housing & bearing (commonly called the 'Jumbo' pump) part no. W815
Type 1 has a unique (smaller) bolt pattern, so must be used if you want to retain the original pulley and fan.
Types 2 & 3 use the same pulley (as each other) and can often be interchanged; the only difference between the 2 is the length of the shaft in front of the flange. Type 3 is usually the one seen on cars with factory-fitted Frigidaire air conditioning.
Type 4 has the same hub as 2 & 3 but is further forward so its pulley has a bigger offset. Type 4 was actually introduced after the Blue motor intro, so early WB/VC Blue motors can be seen with the type 3 pump.
Hope this helps. Can we make this sticky, it comes up alot ?
Dr Terry.
Holden 6 waterpumps
#76
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Posted 07 April 2013 - 06:02 PM
#77
_parap187_
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Posted 11 April 2013 - 01:18 PM
Any idea where I can get a W726 ( large hub, short shaft) with cast impellor water pump from??????
Thanks mate
#78
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Posted 11 April 2013 - 02:58 PM
ebay
#79
_hookem4341_
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Posted 16 August 2013 - 08:51 AM
Steve that counter worker probably won't know S-it from clay if he stepped in it lol. An probably has never even owned a classic Holden. A Genuine GM Pump should be Marked> GM < on pump neck like this one http://www.ebay.com....9#ht_398wt_1313 I have it for sale, as stated above Holden don't produce them anymore and sell crap from India, Asia, Mexico or Brazil > pressed steel impellor speaks for it self its a cheap copy they work > sort of < but aren't the right pump, this pump I have is large hub GM with cast impellor and did come off an LJ 202, has slight corrosion and has been sitting for 20yrs in my gear. Though it is a good pump. spins freely. That's why I kept it. Glad to see you found a pump. but original's are getting rare.
#80
_jtfenech_
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Posted 05 September 2013 - 05:24 PM
can you still buy pulleys for these pumps I can seem to find one from any suppliers
#81
_Bluejinx202_
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Posted 05 January 2014 - 09:55 PM
Hi all
I've read this post a few times now and am still a little confused.
Is the problem with the new steel type impeller pumps not enough flow at idle? or cavitation at high revs?
I went to a local auto shop and the guy who owns the place used to run a supercharged 6 in speedway. He said the steel ones flowed better but at high revs (above 6,500) they cavitated. To overcome this he said to remove every second fin. Obviously this is not practical for an engine that idles a lot.
So is the problem high revving cavitation or not good enough flow at idle for the new style pumps?
thanks,
Adam
Was this question ever answered? I've got a pump out of an old speedway engine that has the blades cut and wondering if it's the one I should use?
#82
_Inj gtr202_
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Posted 06 January 2014 - 12:41 PM
Was this question ever answered? I've got a pump out of an old speedway engine that has the blades cut and wondering if it's the one I should use?
no I never got an answer.
My guess is the new ones cavitate at high rpm. I'm using a standard pressed steel bladed one on the road car and have no cooling issues. Race track might be different.... don't know.
#83
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Posted 11 February 2014 - 05:52 PM
I have done a lot of research into cooling systems over the years, largely from specialist race divisions and engineers in America.
Google will find you plenty of info.
The end result from all of this was that water FLOW is the most critical thing to get correct in any car. Generally, the more the better. (of course there are limits and exceptions)
Unless a car is overheating, most people assume that everything is OK.
The truth is that many other not-so-pleasant things can be going on.
If you can get good water flow, matched precisely to your engine speed/load requirements, you have 90% of the job done.
This is one of the reasons that some very expensive electric water pumps are used in many high end teams.
Next most important is to eliminate steam pockets in the system - but not what this thread is about....
If you ever get a chance to talk to a pump specialist, regarding vane design and flow rates, you will quickly learn that the cheap fan blade impeller type pumps are less-than-best to say the least.
Although they might seem to be 'doing the job' the reality is that it will be the other components in the cooling system (fan blades with shrouds, larger high flow radiators, electric fans etc) that will be taking up the slack
The enclosed impeller type pumps (as per original) are far superior to the cheap blade type
#84
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Posted 11 February 2014 - 07:00 PM
A speedway car is usually doing top speed most of the time it is running, getting maximum air flow...
#85
_glennhailstone_
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Posted 01 March 2014 - 11:37 AM
Chopper, why write that you found one and not tell anyone where to get them.. Anywhoo, You can get these pumps on ebay Australia GMB, and they will fit the cast iron impellers on request.
#86
_jtfenech_
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Posted 23 March 2014 - 11:36 AM
you can get the cast impeller easy I bought one Friday from auto surplus in Mitcham $30 for the cast item they have them in stock
and took all of 5mins to change just pulled the old one off and pressed the new one on in the vice easy as
#87
_duggan208_
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Posted 24 November 2014 - 10:55 AM
I use a Davies Craig electric pump and controller. Not worried about originality, to late for that. The electric pump supplies a constant flow of coolant at any rpm. The controller senses coolant temp and turns the pump off or on, can even slow or speed up the pump to keep the coolant temp at whatever temp you set the controller at. I have a fuel injected, big camed pig but it doesn't overheat, not yet, although it gets hot when sitting in traffic. Another positive feature is that when I shut the engine down the pump keeps pumping coolant through the engine for about 2 minutes.
Regards Jon Owens.
#88
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Posted 16 May 2021 - 08:24 AM
I'll go out on a limb here and ask the (probably dumb) question: If you fixed a flat disc on the back of the "open" impeller blades to emulate the cast item would that help?
^^ was thinking along those lines myself but just put it down to
some of the "strange" shit i dream up sometimes and forgot about it.
I wonder if anyone has tried it, might give it a go and see what happens,not that big a job.
Hi all, just trolling through this thread, wondering if anyone gave the above a go??
Also, cast impellers, were the original fins just stumpy and straight as pictured, or were they curved??
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#89
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Posted 16 May 2021 - 12:12 PM
Tried pressing cast impeller off my old pump. I got the hub off ok but the cast impeller shattered in the process. I can say the teeth were straight like in your picture.
early Holden nut
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Posted 17 May 2021 - 10:07 AM
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Posted 19 June 2021 - 04:27 PM
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Posted 19 June 2021 - 07:58 PM
Hi all will above mentioned pump fit lj gtr 202 red motor thank you
No.
This is the one you need if you are using the original engine fan.
https://www.ebay.com...sid=p5731.m3795
#93
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Posted 20 June 2021 - 09:14 AM
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Posted 16 August 2021 - 07:01 PM
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Posted 21 May 2022 - 08:46 PM
No.
This is the one you need if you are using the original engine fan.
https://www.ebay.com...sid=p5731.m3795
I think that this is not the correct pump for a 202 LJ as the shaft is too short. I still need to confirm it but I think that part number W814 could be more suitable but it's not a cast impeller.
#96
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Posted 21 May 2022 - 09:40 PM
#97
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Posted 21 May 2022 - 11:00 PM
I think that this is not the correct pump for a 202 LJ as the shaft is too short. I still need to confirm it but I think that part number W814 could be more suitable but it's not a cast impeller.
The pic of the pump may simply be a generic pic for illustration purposes only.
The product description says it is the correct water pump with a cast impeller to suit a 173 & 202.
https://www.ebay.com...sid=p5731.m3795
Edited by S pack, 21 May 2022 - 11:03 PM.
#98
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Posted 22 May 2022 - 12:02 AM
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Posted 22 May 2022 - 07:08 AM
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