Engine Thermostat for 4 liter V6-------

[dpfurby]

I have a 1994 Ranger with the 4 liter V6 engine--

Is a 198 degree F rated engine thermostat a good choice??

Thanks.

 

[RonD]

Yes, that is fine.
Usually they come in 192degF or 195degF, but 198degF would be OK.

If possible get one that has a "jiggle valve", I know that sounds like an "oh sure pull a fast one on the newbie", but it is a real term, lol.

There will be a small hole in the thermostat plate, inside the hole will be a metal pin.
This hole should be mounted at 12:00 in the thermostat housing.
It allows air to escape when refilling the cooling system.
The term "jiggle valve", I would assume, comes from the fact the pin jiggles in the hole.
The reason for the pin is so the hole won't get clogged up, with coolant flow the pin will move(jiggle) and prevent hole from being clogged.

 

[adsm08]

A 198 is great if you live far north. If you are below the Mason Dixon line a 195 is better. If you live in the deep south a 180 would do.

 

[SenorNoob]

What if you live about a mile from the Mason/Dixon line and work on the other side?

 

[RonD]

What if you live about a mile from the Mason/Dixon line and work on the other side?

You marry your cousin quit your damn Yankee job and remove the thermostat altogether, scares the squirrels .



I wouldn't run a 180degF t-stat in a newer Ford.
The whole point of the thermostat is to get engine up to 200degF ASAP
Once any t-stat opens you have all the flow you are going to get, so 180 or 195 have exactly the same cooling flow.

The 195 just gets engine temp up to 200degF faster so better MPG and lubrication.
180 t-stat might not even get engine up to 200degF on a cold day, so you would be burning money.
On a hot day it wouldn't matter, 180 would work but so would 195, so.......best result all around, 195

If I lived where outside temp was 80 to 120degF year round I would remove the t-stat, better flow ......and, of course, more squirrels

 

[SenorNoob]

FYI: You've been sigged.