gbmoto Posted January 18, 2022 Share Posted January 18, 2022 Hi All Doing a few pipe changes on the V8 and decided it would be good to swop the pump at the same time. But didn't realise how many different ones there are! It's an early 3.9 from a Range Rover but has been very messed with so could be anything really, have excluded a few but there is still a choice. Also a bit perplexed as to how to get this one off?? So any ideas on which one it is and how to remove the pulley please? ( Looks to be welded on 😬 ) I guess removal and replacement of the pulley is the important bit for belt alignment. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted January 18, 2022 Share Posted January 18, 2022 Never seen a pump nose quite like that.... the back half looks like standard RRC 3.9 flavour. Quote Link to comment Share on other sites More sharing options...
gbmoto Posted January 19, 2022 Author Share Posted January 19, 2022 Thanks Bowie, I think I may need to remove the pump with pulley still mounted. I have a fully dressed 3.5 in the garage ( as you do 🙄 ) and measuring that the pully is about 5mm closer to the pump so easy to knock up a spacer for the 3.9. Anyone know the difference between an aircon pump and non aircon? Quote Link to comment Share on other sites More sharing options...
Stellaghost Posted January 19, 2022 Share Posted January 19, 2022 14 minutes ago, gbmoto said: I have a fully dressed 3.5 in the garage ( as you do 🙄 ) and measuring that the pully is about 5mm closer to the pump so easy to knock up a spacer for the 3.9. Anyone know the difference between an aircon pump and non aircon? Aircon is a separate pump altogether not related to that pump your showing it that's what you mean regards Stephen Quote Link to comment Share on other sites More sharing options...
Junglie Posted January 19, 2022 Share Posted January 19, 2022 51 minutes ago, Stellaghost said: Aircon is a separate pump altogether not related to that pump your showing it that's what you mean regards Stephen But is there some difference in the belts and belt position on an aircon setup? Quote Link to comment Share on other sites More sharing options...
Stellaghost Posted January 19, 2022 Share Posted January 19, 2022 17 minutes ago, Junglie said: But is there some difference in the belts and belt position on an aircon setup? Not that familiar with the v8's but you could have a serpentine set up that picks up all engine related pumps including aircon, or the aircon will be run off a separate belt via a twin pully drive regards Stephen Quote Link to comment Share on other sites More sharing options...
gbmoto Posted January 19, 2022 Author Share Posted January 19, 2022 Ta All, yes I'm wondering if the snout bit is longer for a dual belt pulley to run the AC maybe?? Thinking of going for this https://www.johnrichardssurplus.co.uk/water-pump-v8-stc483.html and then using the pulley from the 3.5. The engine number denotes 1988 but of course have no idea of the spec of the Range Rover it came from and it has been "tweaked" a bit since. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted January 19, 2022 Share Posted January 19, 2022 I would say probably not, much easier and cheaper to just bolt a different pulley to the same pump. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted January 19, 2022 Share Posted January 19, 2022 From what I've heard there's a whole plethora of subtly different and overly convoluted belt setups for the earlier V8's, @Hybrid_From_Hell I think at one time had memorised a lot of them... if there's a later version front that uses a single serpentine belt for everything I would jump at that in an instant. The oddly long-nosed water pumps like that were certainly an early thing, could even be SD1 as there were a lot of swapsies done with old SD1 bits and the like. Quote Link to comment Share on other sites More sharing options...
gbmoto Posted January 20, 2022 Author Share Posted January 20, 2022 Thanks all, I have ordered a STC483 which is the "correct" pump for the engine. But yes, the pulleys seem to be a total nightmare and not easy to find, I'm hoping the 3.5 one will be a start at least, maybe with a spacer to adjust the distance. Will update when sorted. Quote Link to comment Share on other sites More sharing options...
Escape Posted January 24, 2022 Share Posted January 24, 2022 As far as I know the water pump should be interchangeable for all V8s with a V-belts. The belt arrangement is like below, with the alternator in the right corner of the picture (so engine/car LHS) and AC in the left top corner, driven by a separate belt from a double pulley on the water pump. In your photo the alternator seems to be on the other side, on the same belt as the water pump. That makes me think the V8 is from a different car (Morgan, TVR, ...) ? Or it's a 3.9 built up with (older) 3.5 bits. As above, never seen a pulley/nose like that on a Land Rover. Do you have an engine driven fan (on the water pump) or an electric one? Edited to add, looks like it could be from a Stage 1/ early 110, but with a bigger engine and added power steering. Not to familiar with those, curious to learn more! Quote Link to comment Share on other sites More sharing options...
gbmoto Posted January 24, 2022 Author Share Posted January 24, 2022 Thanks Escape, yes I agree, I think it is an '88 3.9 but with earlier front end, the heater pipe routing is also wrong for an 88. The layout of alternator and pas pump are identical to a fully dressed 3.5 from an early 110 that I have. Currently it is just running an electric fan but I may well add the 3.5 mechanical fan when all done. Quote Link to comment Share on other sites More sharing options...
gbmoto Posted February 14, 2022 Author Share Posted February 14, 2022 (edited) Well a small update, bought a standard 3.9 waterpump, looks like that will fit fine. Alas the pulley from the 3.5 was way different and no way would it fit. So bought a standard 3.9 pulley but alas it needs about 1 cm extra back spacing. As these belt runs are governed by the crank pulley options are a bit limited. Now thinking about a dual pulley top pulley...if you see what I mean........ Edited February 14, 2022 by gbmoto Quote Link to comment Share on other sites More sharing options...
gbmoto Posted February 17, 2022 Author Share Posted February 17, 2022 Well, that didn't fit the water pump, the flange on the 3.9 is too big to fit within this pulley, just like the 3.5 I have........ grrrrrr So next plan is compare the 3.5 and 3.9 pumps, if it is just the flange that's different then I need a 3.5 pump Jeez thi is painful 🤪 Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted February 17, 2022 Share Posted February 17, 2022 Can you pick it out from a line up? Rover V8 Water Pumps | Rimmer Bros 1 Quote Link to comment Share on other sites More sharing options...
gbmoto Posted February 21, 2022 Author Share Posted February 21, 2022 Thanks Bowie, that's really handy, at least the gaskets' look the same so that's a plus and the different flanges are obvious now. Quote Link to comment Share on other sites More sharing options...
gbmoto Posted December 27, 2022 Author Share Posted December 27, 2022 Just to round this out, my 3.9 seems to have the front of a 3.5, once I worked that out a bog stock 3.5 pump worked. Needed to do some creative stuff on the welded original to get it off tho' All back to standard and can even fit a viscous fan if I want now. Also did the valley gasket, injector seals and changed to the heater hoses over the rocker cover rather than under the inlet manaifold. Just one strange thing...... how do you get the thermostat to stay in place whilst bolting on the manifold? Just kept slipping out, even tried to stick it in with a few dobs of silicone but no luck. I was sure it was right at one stage but it slipped whilst tighnening resulting in a major leak. Just to test everything it's together without a thermostat at the mo. I guess there is a clever technique??........other than tipping the landy on it's tail.......😆 1 Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted December 27, 2022 Share Posted December 27, 2022 Yeah, I think anyone with a V8 has done that with the thermostat, just need to jiggle it all into place and hope! Quote Link to comment Share on other sites More sharing options...
smallfry Posted December 27, 2022 Share Posted December 27, 2022 Missed this first time around. That pulley does look mighty familiar, the actual pulley part, not the front bit that has been welded, but I cannot remember what it was fitted to. Whatever it came from would be quite old, as it looks like the early narrow belt. Might even be off a four cylinder. or a LDV Sherpa V8. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted December 27, 2022 Share Posted December 27, 2022 5 hours ago, gbmoto said: Just one strange thing...... how do you get the thermostat to stay in place whilst bolting on the manifold? The engine is tilted back slightly as standard, if you can sit it in the manifold I've found they usually stay put without too much of a fight. Quote Link to comment Share on other sites More sharing options...
gbmoto Posted December 28, 2022 Author Share Posted December 28, 2022 Thanks All, will persevere, at least I'm not the only one! Quote Link to comment Share on other sites More sharing options...
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