Thread: Help identifying water pump part

That pump looks like the early model Disco V8 waterpump, pre update .. something like 88-94(ish).
Early RRC's have the same waterpump design, but the spindle is different.

Like this example.

(Have no affiliation or experience with the above ebay link .. just posted for the pic reference.)

As for the VC and the fan:

I'd reckon that your early looking VC will have the large nut on the front of the VC to remove it, which means you have the long spindle type waterpump(early RRC) rather than the threaded flange type as the above link.

if this is the situation, dunno whether yours can be changed to accept the later threaded flange, and whether the pulleys will line up as per your setup.
The earlier model Discos also used v belts, I think the later models(94-95 ish) changed to the serpentine setup.
So if you went with a early model D1 pump, you'd probably have to change the pulleys VC(which you need anyhow) and the fan for it will be the 11 blade type

Did some quick searching on the topic and found that if your VC unit is the one with the holed centre that sits on the spindle, then it's part No. is ERC2849.
The 7 blade fan seems to be LR part No. 614739.

As for the actual waterpump you may have .. engine number will help, but there are a few options available.
How many bolts on the end of the flange(4 bolt, or 1 bolt types), and if 1 bolt, how long is the spindle(ie. long or short).
What I've found for waterpump part no. options are R613273(1 bolt short), STC1610(1 bolt, long) .. most likely this one, but not definite, and STC481(4 bolt flange) .. very unlikely.

If you can remove the VC and or fan unit and get pics of the front, would help.
Also how much do you want to spend?
Whether an 11 blade fan fits will be determined by the spacing of the 4 bolt holes AND the recessed cutouts on the VC unit where it holds the fan's metal central hub area securely.

Hope that helps.

Arthur - wow - I have found the tech forums great for getting that expert info when needed but WOW man this is tremendously helpful.

I suspect it is an early block - might chase the guy I got it from and check (and engine no)

The pulleys are important as we run a serpentine belt to the supercharger and v belt(s) to the pump and Alt/Air con. So a major change if not run and line up same pulleys. (Currently have a power steer one, supercharger on, water pump/air con, alt one plus another one. One serpentine would be great but none line up so a night mare of change if go that path).

I do need better air flow cooling at low speed to off set the heat from the super charger if I can get it (hence 11 blade option). Since dyno re-tuning it now runs a little hotter and that is an issue on long tows up hill (eg 14km limb out of Kempsey) or super low range (have under drive) off road work where air flow limited.

I was hoping to avoid removing the VC to be able to order parts but I suspect I will have to bite the bullet and remove radiator and then VC to look and what I have then decide (based on more advice) what pump and what VC/Fan combo will work. Dang and if I do that might as well get a new bottom hose while at it for preventative maintenance.

It all escalates when you start unbolting and changing!

Originally Posted by Skiboy

....

It all escalates when you start unbolting and changing!

LOL! tell me about it.
I've learned over the years the hard way too!

You most likely don't need to contact the previous owner as to the source of the engine, just get the engine No from the LHS of the engine(ie. passengers side), should be near the dip stick on the block.
Between cyl 3-5 on a flat surface that is very obvious once you check it.
if the flat surface is massively gummed up like mine have been, I use carby cleaner to remove the gummed up crap.
You'll see both engine No and compression ratio.

eg.
CR 8.23:1(that's what mine is)
XXDXXXXX and maybe a suffix after that too, like A/B/C/D/E or something.

Only problem is with the engine number is that it's tied to the block, and whilst nice to know, if they only changed the block/heads, and kept your model front end(pump/pulleys/etc) than the engine number doesn't help at all, and only complicates parts for your installation.

That is, the 'correct' parts that you're searching for most likely won't be related to the block No. you have, and some of those parts are linked to the original engine block number .. not necessarily what you may have.

if you get the VC off and can measure the bolt hole distances and the size of the central circular cutout on the fan, maybe someone can measure up other parts to help you determine if another fan can fit.

OK I remembered I have all the specs on the engineer's form/documentation so I opened it

My engine no starts with 12G on the block which according to a net table I found is an early v8 from a stage one - now that is very fitting as the body is also from a stage one! What a coincidence!

12G00001

Land Rover Stage 1 V8 8.13:1cr

So the pump and fan are probably the same - early 3.5

Will pull and then see how I go re measurements - I now wish I had the old engines I threw out from RRC and Disco as could have compared.

Sikboy

OK, that seems to make some sense.

Don't know myself about series LRs, never had experience other than some with my dads IIa.

But from the info I did find on those parts numbers, the used the same style viscous, with the hole/bearing setup that is fastened with the central nut .. as opposed to the later nut on the rear type viscous.

I was a bit eager to close down some of the tabs I had opened and didn't read the info fully, but I think the difference between the long 1 bolt spindle type and the short 1 bolt spindle type.

The differences in lengths of the spindle of the two different pumps are obvious, so you won't need to be exact to work out if you have either of those types.

they both have a 5mm thick flange.
Short one has a 31.5mm spindle from the flange to the start of the threaded stud(for the VC), and 35mm for the threaded stud section. Total length of the flange to tip of the stud should therefore = 71.5mm from rear of flange to tip of threaded stud
Long one could be, 56.8 for the pulley section of the spindle, and 28.4mm for the stud .. total length of the spindle = 90.2mm from rear of flange to tip of threaded stud.

Going off those dimensions, you won't even have to measure anything .. it should be obvious once you have the VC and pulleys off.
The long one seems to have a central spindle section twice as long as the VC threaded section, whereas the short one is more equal in relative length.

Here's a link to an image of the short spindle type with rough measurements. You'll see on that page there's a link to the long spindle type too.

Stage One was the V8 "Series" before the defenders as I crudely understand it.

Anyway I really appreciate your research identifying the different types of pump spindle lengths. I hate buying wrong parts due to lack of homework and having to wait weeks to finally get the right parts.

I looked up the stage one manual and checked he procedure to remove the VC so all ready for tomorrow to dismantle and figure out what I have.

Trick then is what will fit - I may be stuck just replacing pump with new equivalent, the lower hose (because so much easier to do when this is apart) and VC and keeping the current fan that fits.
I just wish I had some alt wrecker parts to play with.

Skiboy.