After 4 wiring harnesses I have finally sourced one from a member here that is worthy enough of being installed on my car. I was looking to purchase a new one from mazda but after close to $2,000 for the harness even with a discount from my friend who works there I decided to pass up on that and try and find a useable used one. Well now I am going through the upper half of my car again ready to install it back in, hoping my electronics will work properly nowl

Now here is my question, after my rebuild I had some overheating issues (which have yet to be ironed out) and some fuel issues (the old wiring harness was the problem). My motor only has about 1 mile since rebuild, and before I start putting everything back together I need to rule out my waterpump as being a overheating problem as it is buried underneath everything. I wanted to know if our waterpumps are just like any other waterpump where the indicator of bad is that it will leak through a hole on the bottom? If not how can tell if my waterpump is bad. I hadn't replaced it during the rebuild assuming it was still good. I did have some pinhole leaks that I had sourced after the most recent overheating, would these pinhole leaks be enough to cause boil over. My next possible suspect is my aftermarket thermostat, as I have read some do not include a bypass in them, would that be a problem? Well thanks alot for any help and input you have it is greatly appreciated,
Thanks,
Lorenzo

 

how much water can our waterpumps pump, if our pumps could pump water?

 

Oh ps I believe this might be the stock waterpump, if so what are the chances it would have lasted over 200,000 miles,lol.

 

probably as much as wood chuck could chuck wood.

The reason I put waterpumps water pump, is because people can spell waterpumps two different ways so I figured I would save the next person who was looking for similiar information the hassle of searching waterpumps both ways. Wood chuck.

 

You can get a brand new harness from Malloy Mazda for about $700....

A water pump pretty much either works or it doesn't (usually leaks). Sometimes, the impellers can corrode away. They are really not that expensive, so I would just replace it if it really is that old.

 

I would like to replace it while I have the top half off, but I can't find one locally, seems they are all sold out, my luck. But it seemed to look good not too corroded when I pulled it off during the rebuild and there is no leaks coming from it. I am just trying to save myself some trouble, both ways, I really don't feel like tearing it down later on, but I don't want to replace something that is okay especially since it may be weeks away from getting it. The anxiety is making me sick.

 

do you think pinholes leaks could really cause boilover? I swear the FD is the worst when it comes to coolant issues.

 

I don't know much about the water pump, but I highly recommend replacing your thermostat. The OEM t-stat is less than $20, and don't forget to buy a new gasket. I also suggest drilling a few small holes (1/8" or so) around the outside of the thermostat, so you'll have less coolant bypassing the radiator.

-s-

 

As long as it has an impeller, isn't noisy and isn't leaking, I doubt it's a problem. Mine has at least 156k mi. on it.