The water pump is the original with 176k miles.
I believe this happened just before the end of the driving season in early November 2025. It has been sitting in the garage since then.

The little yellow drip in the right side image appears to have originated higher up than from behind the alternator pulley.
Another image shows the yellow drip above a bolt with red drips.

I'm ordering a new water pump from Mazdatrix with the gaskets.

What I don't understand is the change in color of the coolant, if that is indeed what it is. If not coolant, any ideas what the liquid might be?

 

The mirror sure looks like an antif-reeze. I'm wondering if maybe there is also some oil leaking/seeping from the OMP a line and mixing with the anti-freeze?

 

Tim - are you running green coolant? Looks almost like corrosion in the pics that show the residue more of a maple syrup color. If truly original, the casting or gasket may be corroded causing the coloration. You'll know more once you get it apart. Not a difficult job. Let us know how it goes,

 

Smell it and taste it to determine if its coolant. The MOP doesn't appear to be leaking. Has the coolant level gone down at all in the overflow? At that mileage you probably need a new waterpumjp regardless. Might want to get some silicone hoses as well while you have it drained.

 

The OMP looks good, and the lines are intact.
There is a small seepage of the front line at the carb that I now need to attend to.
However, I could not determine if the oil made it that far down and over to the left. I need to move stuff out of the way.

 

Yes, green coolant.

Yes, I was thinking the gasket and age could be contributing to the blood color.

Yes, the coolant level in the overflow has dropped. I did track a leak going up the right side of the radiator to the top radiator hose. I tightened that clamp and all the others on the right side. I still have to check the left side hoses.

All coolant hoses were replaced with the 2014 rebuild. Only 16k miles since the rebuild.

Any sources for silicon hoses?

Next I need to clean off the workbench to make space for the parts.

I will file progress reports.

As always, you guys are a great help.

 

Ordered the pump, gaskets, and their silicon hose set from Mazdatrix.

Can't drive it now anyway. All our streets are still covered is salt dust.

 

If you do replace the water pump, make sure you also replace the water pump housing gasket - this is often an overlooked item.

 

Do the older engines get the little spacer washers, too. Asking for a friend.

 

Yes need to keep an eye on the washer shims... do not forget or misplace those. They correct for gasket thickness. I have had good luck with Hylomar as a gasket dressing.

For future reference, OEM coolant hoses and water pump are available new from Mazda.

I also had my water pump start weeping during winter storage. This was an aftermarket (GMB) pump that was probably 6years old. Maybe lack of rotating the shaft/seal and belt tension pulling to one side makes them weep during storage!

 

They do -lol. The only reason i know this is because when I bought my '83 last year - I didn't notice it had a small coolant leak until driving it and picking up the smell. It was very little since it was dripping out of the weep hole to the point where it would evaporate from the heat before hitting the floor. Anyway, my uncle volunteered to help me change it since he was fresh off of redoing his due to a leak from the water pump housing gasket. This is when he advised me to make sure I not only got a water pump but also the housing gasket and the little washers too.

 

[QUOTE=tommyeflight89;12651067]Yes need to keep an eye on the washer shims... do not forget or misplace those.

Thanks.
I ordered a set because I'm real good at loosing small parts, like the corner seal springs.