Menno van Rij Posted November 14, 2016 Report Share Posted November 14, 2016 I post it here because it has to do with the 4pot engine. Yesterday afternoon, I attended the annual Dutch Triumph Parts Day. In short, there was only one thing that drew my attention. A guy with a few waterpumps on display. He had a few pumps dismantled for us to realise how the quality of the shaft is... corroded etc. The guy produces s/steel shafts as a replacement for the iffy quality shafts. A few pics to show what I mean: Menno Quote Link to post Share on other sites
Ian Vincent Posted November 14, 2016 Report Share Posted November 14, 2016 I rebuilt my waterpump with a SS shaft that I got a friend with a lathe to turn up for me. Rgds Ian Quote Link to post Share on other sites
Richardtr3a Posted November 14, 2016 Report Share Posted November 14, 2016 I have one of his rebuilt water pumps with the s/s shaft and after seeing the pictures i have made a good choice. Sorry to hear about the spares day. Owners are buying on line, There are less basket cases around TRs are not used as the main car Most are in show condition Some never even get wet. Owning an old TR3 is not like it used to be. But I still enjoy it as a preoccupation and hobby. Richard &H. Quote Link to post Share on other sites
littlejim Posted November 14, 2016 Report Share Posted November 14, 2016 I took the wimp's way out, put a steel plate over where the water pump goes, and fitted a Davies-Craig electric water pump. Quote Link to post Share on other sites
Guest Posted November 14, 2016 Report Share Posted November 14, 2016 I have one of his rebuilt water pumps with the s/s shaft and after seeing the pictures i have made a good choice. Sorry to hear about the spares day. Owners are buying on line, There are less basket cases around TRs are not used as the main car Most are in show condition Some never even get wet. Owning an old TR3 is not like it used to be. But I still enjoy it as a preoccupation and hobby. Richard &H. Good observation about the Parts Day! Menno Quote Link to post Share on other sites
Kutscher Posted November 14, 2016 Report Share Posted November 14, 2016 (edited) I had also some problems with the waterpumps. But is a s/steel shaft the best choice ? The corrosion is after many many years, and will not affect the functionality of the pump. I never see one break at this point! And don't causes leakages. One off the problems that causes damage on the keyway, is the nut, that holding down the pulley and is loose or gone. Another problem is that the bold of the shaft is to small. With use of the original big fan belt, the load can be somewhat heavy, and can break down the bold. The pulley can come loose and you get the problem of damages on the keyway. S/steel have some disadvantages, under load, material stresses and the screw-tread can break quicker, The best way is to produce (on a late) a shaft from normal steel with the bigger bolt, with no keyway but 2 crews between shaft and pulley. So the torque is divided. Another improvement is setup the impellor with smaler clearance, between impellor to the body waterpump. You get a higher water flow when driving with lower rpm. So a cooler engine in traffic. I had all this problems with my Triumph TR2, i drive this car with a Judson supercharger, with drive belt on the waterpump pulley, that causes extra load on the water pump. Now it is some years bullet proof, and also cooling is improved. Edited November 14, 2016 by Kutscher Quote Link to post Share on other sites
tim hunt Posted November 14, 2016 Report Share Posted November 14, 2016 If the car is run year round with good quality 50/50 ethylene glycol/water mix with corrosion inhibitor package and this mix is changed at max two yearly intervals shouldn't this protect the water pump shaft? Out of interest at the last change I put some old nails in both the two-year old anti freeze mix I drained from my car and some of the fresh mix and after three months the nails were still rust free. Tim Quote Link to post Share on other sites
Kutscher Posted November 14, 2016 Report Share Posted November 14, 2016 (edited) Hi Tim, The part of the shaft that always is corroded is not in the area that turns in the cooling liquid. This you can see in the drawing pictures of the water pump. The part that is corroded is the part that runs free in air. But when the mechanical seal is leaking, than this shaft will run in the cooling liquid, and if it is water, it will corrode. Edited November 14, 2016 by Kutscher Quote Link to post Share on other sites
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