Replaced my T-stat,but.........

[IvanHoe]

Ok, I just swapped out my thermostat and I noticed that the replacement one (stant#13758), does not have a jiggle valve. Should I be concerned? My guess is that the stant one incorporates the jiggle valve's functions in some other way in it's design.
Everything seems OK, heats works, car has not overheated.......I dont know, what are your thoughts/experiences?

[Mike Gerber]

I replaced mine on my 94 about a year ago and stuck with Toyota OEM for the few extra dollars. Now that your's is replaced with an aftermarket I wouldn't be too concerned. Just watch the temperature gage for the first few times you drive it and make certain the car is at normal operating temperatures.

Mike

[DFBonnett]

Other than OEM, the only stat I'd use would be a Stant. I've never had a problem with Stant. You're probably fine; but, as Mike noted, keep an eye on it for a few days. If you don't have a problem by then, likely you never will.
FWIW
YMMV

[IvanHoe]

Originally Posted by DFBonnett

Other than OEM, the only stat I'd use would be a Stant. I've never had a problem with Stant. You're probably fine; but, as Mike noted, keep an eye on it for a few days. If you don't have a problem by then, likely you never will.
FWIW
YMMV

Agreed, Stant is a good company with quality products, Im upset with myself that I didnt get their deluxe/premium version(called superstat®), which is suppossed to be better for the colder climates.....I didnt even know of it until the next day when I did some research online.
Stant doesnt even make any t-stats with jiggle valves, so they mustve done research and figured it's not necessary.
In fact, I called my mechanic today and he said that he's been using non-jiggle valve Stant t-stats for years in all types of cars, including Yotas like mine and never once has there been an issue.
Also, I did some driving today and all seems well .......
thanx to all of the replys to my thread, I appreciate it!

Ivan

[Tommy]

in the factory repair manual, it specifically says that replacement t-stats may or may not have a jiggle valve. doesnt really matter either way.

[IvanHoe]

Originally Posted by Tommy

in the factory repair manual, it specifically says that replacement t-stats may or may not have a jiggle valve. doesnt really matter either way.

Really?.....I just bought a factory repair manual(the "bible"). From what I read, it talks about the protrusion on the inlet pipe lining up to the jiggle valve when installing, but I didnt notice whether or not you have the option of going jiggle or non-jiggle.

[toyomoho]

Stant list Toyota as one of their OEM customers. If the coolant system seems to operate OK, then might not worry about it.

[Doctor J]

Jiggle valve helps to get rid of air faster, but it also can be done by running engine at idle until the thermostat opens, and then letting engine cool down and adding some coolant to the radiator

[csaxon]

^^^What he said. Jiggle valve for faster burping after coolant system flush and refill.

[IvanHoe]

On my quest to find out why Stant brand T-stats dont have jiggle valves, I emailed them.
I got a response an hour ago,

"The 13758 Stant thermostat has a bleed notch between the
thermostat valve and flange which does the same job as the jiggle pin.
That is, to allow trapped air to be removed from the engine after the
thermostat is installed. If you hold the thermostat up to the light, you
can see the notch. You can find the notch, mark it, then install the
thermostat with the notch to the high side of the thermostat housing.
The stat will then do the same job as the OEM style with the jiggle pin."

The thing is that I didn't know of this "notch" beforehand and I wrote back to them that I might have installed it with the notch on the bottom side of the t-stat housing rather than the top side like they recommended. They then replied back to me,

"It may take longer to burp out the air but you
should not see any longer term problems."

[Mike Gerber]

Originally Posted by IvanHoe

On my quest to find out why Stant brand T-stats dont have jiggle valves, I emailed them.
I got a response an hour ago,

The thing is that I didn't know of this "notch" beforehand and I wrote back to them that I might have installed it with the notch on the bottom side of the t-stat housing rather than the top side like they recommended. They then replied back to me,

Just for peace of mind you can go back to where you bought the Stant thermostat and ask them to just show you another one. You can hold that one up to the light to varify what they said in their email. You are probably fine either way, but if you are not comfortable not knowing the way you installed it, drain the coolant out again using a piece of hose to catch and save all the coolant. Then reinstall the thermostat with the opening on top and then reuse the coolant. Get the front of the car slightly inclined and with the radiator cap off, let the car idle for about 45 minutes. This method won't cost you anything but some time.

Mike

[IvanHoe]

Originally Posted by Mike Gerber

Just for peace of mind you can go back to where you bought the Stant thermostat and ask them to just show you another one. You can hold that one up to the light to varify what they said in their email. You are probably fine either way, but if you are not comfortable not knowing the way you installed it, drain the coolant out again using a piece of hose to catch and save all the coolant. Then reinstall the thermostat with the opening on top and then reuse the coolant. Get the front of the car slightly inclined and with the radiator cap off, let the car idle for about 45 minutes. This method won't cost you anything but some time.

Mike

One step ahead of you.......I just pulled out the t-stat and returned it for the better superstant® ←(linky) t-stat, it's Stant's premium version thermostat(suppossed to be much better, especially for the colder weather). Only one auto part store in all of Brooklyn had it!
I made sure to put the notch on the top this time....all is good.
Thanx to everyone for posting