johnc Posted May 25, 2011 Share Posted May 25, 2011 FYI... a big diesel supply house just sent me two gasoline L6 water pumps in sealed Nissan boxes with the LD28 part number on it (21010-17SY7). The owner of the supply house pooped his pants when I sent him a picture confirming the problem. He's talking with Nissan USA to find out what's up. Quote Link to comment Share on other sites More sharing options...
Tony D Posted May 26, 2011 Share Posted May 26, 2011 Gas, Diesel, what's the difference? (In some cubicle somewhere there is an MBA going "see! see! I TOLD you we wouldn't get any pushback on this. Give the guy some diesel pumps and hope he keeps his mouth shut!") Quote Link to comment Share on other sites More sharing options...
TimZ Posted May 26, 2011 Share Posted May 26, 2011 (edited) If he wants to let them go cheap since they're the wrong part I wouldn't mind having a spare... edit - oops I think I read that backwards. Never mind... Edited May 26, 2011 by TimZ Quote Link to comment Share on other sites More sharing options...
rayaapp2 Posted May 26, 2011 Share Posted May 26, 2011 I have yet to actually find a LD28 water pump for sale new anywhere. And I actually owned the Maxima that I needed one for. If you can find real LD28 water pumps please pm me the details after you get what you need. I kick myself for tossing a bunch of them in the recycling. I hate it when I do that. Ray Quote Link to comment Share on other sites More sharing options...
johnc Posted May 26, 2011 Author Share Posted May 26, 2011 If he wants to let them go cheap since they're the wrong part I wouldn't mind having a spare... edit - oops I think I read that backwards. Never mind... You don't want to buy my regular gas L6 water pump for $175? Quote Link to comment Share on other sites More sharing options...
johnc Posted May 26, 2011 Author Share Posted May 26, 2011 Well... it looks like my last source (JESCO) for the LD28 water pump has dried up. They are selling the gasoline water pump to the diesel guys for $175 each! Nice margin. Maybe its time to machine a few impellers... Quote Link to comment Share on other sites More sharing options...
Tony D Posted May 26, 2011 Share Posted May 26, 2011 John, RE: Impellers If you get the sourcing worked out, perhaps buying 'bearing and seal cartridges' from the same source as the bulk reman shops do is a good plan for an 'upgrade kit'... Basically make the impeller a shrink-on item, and people can take their old bearing housings, drop out the old impeller/bearing/seal package and refit the new items. This is the direction JeffP and I were going. Plenty of gas engine cores out there, but you want a new bearing and seal package to go with that new impeller. If it's cast or even steel, a powder coat, or Techline heavy coat of abradable paint would work well to seal up impeller to casing tolerances as well... I think grooving the tips of the impellers and fitting a teflon wiper is going a bit far... Quote Link to comment Share on other sites More sharing options...
johnc Posted May 27, 2011 Author Share Posted May 27, 2011 The initial look at the LD28 impeller says this won't be cost effective. There's a lot of programming involved in getting the milling correct. Quote Link to comment Share on other sites More sharing options...
rags Posted May 27, 2011 Share Posted May 27, 2011 Now I'm gonna have to open my Nissan box to make sure it's an LD pump. You guys have me worried! Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted May 27, 2011 Share Posted May 27, 2011 (edited) How good is the flow on those MSA e-pumps? Making custom impellers may approach the cost of an e-pump for those that already run e-fans. http://www.thezstore...ZS/PROD/16-7025 Edited May 27, 2011 by cygnusx1 Quote Link to comment Share on other sites More sharing options...
Tony D Posted May 27, 2011 Share Posted May 27, 2011 (edited) That is the downfall of leaving the last company---they had a CMM and Five-Axis capabilities in-house. And PLENTY of apprentices that needed to do programming and setup. All I would have to pay for is the stock. Damn MBA's and their 'no touch parts operation' visions (that fail miserably...) Keep in mind E-Pumps are constant flow for the most part. Unless you have one of the fancy models from Europe that has variable flow / variable speed. The question becomes "at which load point is the flow correct" with an E-Pump. How do you compensate for overcapacity (if it exists) at idle, if sized for maximum load. What happens if flow is lower than expected at full load? Edited May 27, 2011 by Tony D Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted May 28, 2011 Share Posted May 28, 2011 (edited) Ah, I was under the impression that e-pumps were all dc speed controlled by some method (temp or rpm referenced). Yes, a constant speed pump makes compromises. Edited May 28, 2011 by cygnusx1 Quote Link to comment Share on other sites More sharing options...
Tony D Posted May 28, 2011 Share Posted May 28, 2011 Davies-Craig is the only speed-controlled electric water pump that I know of in the aftermarket tuner realm. I may be wrong, but they seem to have a good product. Used extensively in Formula Ford from what I understand. Think they have a pump controller based on water temperature. Quote Link to comment Share on other sites More sharing options...
EvilC Posted November 16, 2011 Share Posted November 16, 2011 Anyone have pictures of the two water pumps? Like JohnC said, my local dealer says they have the LD28 pump in stock. I would like to have a visual reference so when I have to return it there isn't much left to question. Joe - we have to check your parts box this weekend. I didn't even think to open it yesterday when I wrote down the part number. Quote Link to comment Share on other sites More sharing options...
johnc Posted November 16, 2011 Author Share Posted November 16, 2011 The LD28 pump is on the left; Quote Link to comment Share on other sites More sharing options...
EvilC Posted November 16, 2011 Share Posted November 16, 2011 Thanks John. Quote Link to comment Share on other sites More sharing options...
akeboshi Posted November 16, 2011 Share Posted November 16, 2011 Why cant you just use the gasoline water pump for the ld28? They look the same besides the impellers. The ld28 one actually looks like the atsugi gasoline water pump sold at autozone. marcus Quote Link to comment Share on other sites More sharing options...
johnc Posted November 16, 2011 Author Share Posted November 16, 2011 Search. There are distinct advantages to using the LD28 water pump in the gasoline engine L6 engines. Quote Link to comment Share on other sites More sharing options...
Xnke Posted November 17, 2011 Share Posted November 17, 2011 The LD28 pump impeller is far from not being cost-effective. Do it the same way everyone else does; cut it from a casting. Cast, wheelabrade, collet chuck, face, turn, bore, done. Total manufacture time can be less than 20 minutes from a hot melt. The problem is getting someone to stop the more lucrative work they are already doing, to setup to do your smaller, faster job. Quote Link to comment Share on other sites More sharing options...
johnc Posted November 17, 2011 Author Share Posted November 17, 2011 With setup and programming fees, new cartridges, cores, core cleanup, etc. its not cost effective - at least here in SoCal. I've researched it and given that the total sales will be 50 units over 5 years (if I'm really lucky), it just doesn't' work out. Secondly, tying my money up in 50 parts for years doesn't make business sense. 1 Quote Link to comment Share on other sites More sharing options...
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