Originally Posted by
Ixion
I'm out of my depth a bit here so anyone who knows better please correct me. But, FWIW, cavitation refers to a phenomonen that can occur when water flow in a system is restricted for some reason (either poor design or a semi blockage). The pump pumps water out faster than it can flow into the pump chamber. That creates a "cavity" in the fluid, and the pump is under no load. Then water flows back in, and hits the pump. That repeated "hammering" (it's the same sort of thing as water hammer, for you plumber types) , can cause quite significant damage. Electrolysis refers to damage by chemical action. "Stale" coolant can become electrically active . This cause an electrolysis process between disparate metals in the cooling system, which will weaken components. In very very crude terms, your coolant becomes acidic like battery acid and makes your cooling system components rust or rot.
Fin angle is quite important both to ensure decent flow, and also to prevent the dreaded cavitation , already referred to. But there should be enough evidence on the impeller to show the angle the blades were on
Doubt you'd get enough heat out of a butane torch. If you are serious about wanting to have a go, PM me and I'll lend you oxy gear, and some brazing rod. I won't offer to do it for you, cos I'm not very confident it will work.
Originally Posted by
Motu
Electrolisis is when your coolant turns acidic,and the cooling system turns into a battery,transfering metal from here to there - impellor fins get ''eaten away''.Cavitation is when low pressure air pockets form on the blades,metal molecules are ''sucked off'' - this is what eats away outboard props.
Angle? - very important,it controls the speed of the coolant flow....and is designed to prevent cavitation.Get it wrong and your coolant will move either too fast,or too slow.
Go and see Muzza,he knows more about automotive water pumps than anyone in the country,he may be able to adapt something to your shaft.His prices are very reasonable - he has changed impellors for me for free,the last pump he did for me he did a hell of a lot of modifications on,and it cost less than a new pump with all new parts inside.
Where in Kaiwaka are you? Twas my town as a wee lad.
Cheers, I think it was the stale coolant, This was my first change of the coolant since I bought it. It was thick brown sludge. Heaps of it.
I'm pretty confident that my torch will work (1300 degees) and there are some very clear markings on the impeller as to where the fins were so I can get them close enough to where they were.
If it pumps water just a little bit slower it would be good, becuase it runs just off the C on the open road.
FYI I enjoy working on my bike myself. Its a hobby. Deal with it.
Then I could get a Kb Tshirt, move to Timaru and become a full time crossdressing faggot
Reply With Quote
Bookmarks