Aftermarket (Stant) thermostats

RETed · 12-11-2011, 05:25 AM

Welp, I finally got tired running the car cold for lots of short trips, so I had to go take care of a thermostat replacement.
My original thermostat died years ago, and as a band-aid fix, I just gutted the center and reused the flange.
With gas a steady $4+ / gallon now, I'm looking to gain back as much gas mileage as possible.
My current gas mileage calculates out to a solid 11.5mpg - nothing to brag about.
I do lots of short trips, as work is under 5 miles one way; the engine barely gets to operating temps.
I had to take care of a radiator fix, so the coolant finally got drained.

Hell, might as well take care of the thermostat at the same time...

I've heard of stories that Mazdatrix (and some Mazda dealers) are now selling Stant thermostats for Mazdas - disappointment. :P
It sounds like the old (Made in Japan) Mazda OEM thermostats are nonexistant and not made anymore?
I do a lot of business with Rock Auto, so I fired up their website to go look for thermostats.
Looking for a "deluxe" replacement part, I noticed both Stant and Gates offered a "premium" labeled thermostat.
Both were priced around $6 each - can't complain.
(There is an eBay seller selling NOS Mazda OEM thermostats for $20 each.)
Both the Stant and Gates thermostats were both rated at 180F and 195F.
Flipped a coin and ordered a couple Stant 180F ones.
They just arrived today, and it's a Stant "Superstat" thermostat.
Disappointment that the units do not have jiggle pins (like the Mazda OEM ones do), so I'll need to drill holes for them.

I did a quick Google search on these things and went through a couple threads about them.
Bad news is that these things fail in the closed position.
Aside from not having a vent hole, they seem to have an okay reputation.

I'll get around to installing it early next week and report back here.
For the price, it's hard to beat.
We'll see if it's more headaches than it's worth for the price discount...

-Ted

vrracing · 12-11-2011, 06:01 AM

Since you order multiple why didnt you get a Gates for comparison?

Pete_89T2 · 12-11-2011, 08:04 AM

Have the Mazda dealers stopped stocking T-stats recently? I purchased a Mazda OEM T-stat (w/jiggle pin) just last year from Malloy Mazda; cost about $11, which included the seal. Contact Ray Crowe in the parts dept., he'll take care of you.

reese.leblanc · 12-11-2011, 09:19 AM

Good luck with the Stant, Ted. I hate them. I exploded a radiator end tank when I used one years back. Swapped the thermostat, went driving, and BOOM! Coolant going everywhere. I had a friend bring me an extra radiator and I did a road side swap.

When I got home, I tested the thermostat by dropping it in a pot of boiling water. It never moved at all. Not a happy camper.

YMMV

Reese

djmtsu · 12-11-2011, 09:49 AM

Beck/Arnley thermostats have the jiggle pin. They also have them in 180 and 195 degrees.

knonfs · 12-15-2011, 08:11 AM

I've used the STANT thermostats and didn not experienced any issues.

12-11-2011, 06:01 AM	#2
vrracing Rotating Assembly Join Date: Oct 2008 Location: TX iTrader: (0) Posts: 102 Rep Power: 17	Since you order multiple why didnt you get a Gates for comparison? __________________ 90 S5 Vert. JDM Tii with BNR Stage1 turbo. Pineapple Racing street port. Bonez cat-forward. Corksport cat-back with Vibrant UltraQuiet resonator. RTek 2 wZeitronix w/b. HKS EBC. Vis CF Tii hood. 3000GT wing. Ground Control coilover kit with KYB AGX shocks. Red and Black leather RX8 seats. Corksport Odura lip & bumper caps, OEM Tii skirts

12-11-2011, 09:49 AM	#5
djmtsu My minds tellin' me no... Join Date: Feb 2008 Location: Murfreesboro, TN iTrader: (10) Posts: 4,043 Rep Power: 21	Beck/Arnley thermostats have the jiggle pin. They also have them in 180 and 195 degrees. __________________ 1976 Mazda Cosmo RX-5 1976 Mazda Cosmo RX-5 2003 Toyota Tundra TRD 2015 Toyota 4Runner SR5

12-11-2011, 08:04 AM	#3
Pete_89T2 Lifetime Rotorhead Join Date: Apr 2010 Location: Elkton, MD iTrader: (1) Posts: 874 Rep Power: 15	Have the Mazda dealers stopped stocking T-stats recently? I purchased a Mazda OEM T-stat (w/jiggle pin) just last year from Malloy Mazda; cost about $11, which included the seal. Contact Ray Crowe in the parts dept., he'll take care of you.

12-11-2011, 09:19 AM	#4
reese.leblanc Doing my own thing Join Date: Feb 2008 iTrader: (2) Posts: 209 Rep Power: 17	Good luck with the Stant, Ted. I hate them. I exploded a radiator end tank when I used one years back. Swapped the thermostat, went driving, and BOOM! Coolant going everywhere. I had a friend bring me an extra radiator and I did a road side swap. When I got home, I tested the thermostat by dropping it in a pot of boiling water. It never moved at all. Not a happy camper. YMMV Reese

12-15-2011, 08:11 AM	#6
knonfs Rotary Fan in Training Join Date: Mar 2008 iTrader: (0) Posts: 86 Rep Power: 17	I've used the STANT thermostats and didn not experienced any issues.