I wouldn't worry about it there are many many people in the 3800 community who have installed one on their daily drivers without a problem.

Ed

What is life without risk :?:

Yes, but is it an unnecessary risk?

If it fails I'm stranded. End of story. However, I respect Ed'* words so maybe I'll still look into it if heat becomes a major concern.

I've had mine for almost 30k miles no issues at all.

Meziere uses their popular, proven and ultra-reliable custom electric motor with a 3200+ hour life expectancy as the foundation for this water pump. The Meziere Electric Water Pump utilizes a custom designed purpose-built fully CNC machined body and impeller. Engineered for 35+ gallons per minute of optimum flow, Meziere didn't just copy a stock water pump body and impeller; they designed this pump to vastly outflow stock!

Just to ride on the coat-tails of that rogue comment.

A few years ago I lived in Oregon, not a problem.
Now I live in phoenix and my car gets hot in the summer but doesn't with the stock WP.
Sometimes I had to turn off my AC in the dead of summer to allow the car to cool, sitting on the off ramp for I10, 4:40PM and it'* 115*F outside. temp gauge is touching the tick mark on 245* I just don't have that problem with the stocker.

Funny... When I'd step on the gas, the temp would jump up, sitting at traffic signals the temp would drop. changed t-stats just testing, I normally ran a 160. now that sucker would open and stay open.. temps just kept rising slowly until it was hot, had to shut off AC now & then to cool the motor.
180* t-stat, I could go for about 30 minutes on surface streets, temps would become stable around 227*F.
Stock t-stat, same as 180.
Stock water pump & any t-stat, the temps would stay stable around 180~200*F and on the freeway the faster & longer I drove the better it would cool and I could actually get it down to below 180*.

I'm not knocking the electric pump, I'm just saying with my motor, a litle it higher compression.. it gets hot. - and as good of quality that the electric pump is/had... it just didn't keep up when ever I stepped on the gas. Now that'* Phoenix for ya thou-

I kept everything, pump, shorter belt, wireharness etc... packed it up nicely in the box that the mecanical WP came in and some day I'm going to put it back on. But knowing I was going to drive threw the desert in that blazing heat I wasn't going to chance it. I was just sure I was going to melt down the motor and as hot as it gets under the hod in this Arizona frying pan, I can't imaging how long the electric motor can stand those temps either.
I drive my 2000 C5-FRC as a daily driver because its dependable. it took me months of work, changing parts, reconfiguring the heat exchangers in the front end of my car etc and two things made the difference so I could drive my car in the summer.
-1. I installed a remote oil cooler, I removed the fog light on the passenger side of my 1998 Pontiac Grand Prix and placed the cooler right in that hole. That made a considerable difference on the freeway.
-2. I installed the mechanical WP, that rubber stamped it "good to go".

So if you know you are not planning on being in really hot climates, go for it.