Discuss Changing Thermostat and using Sealer? on AllFordMustangs.com, the place for Mustang enthusiasts.
Welcome to our Mustang forums where Mustangers come together to hang out, discuss and enjoy their favorite Mustang hobby with fellow Mustang enthusiasts. We invite everyone to read, post, and enjoy our Mustang forum as well as the many other sections of our site.
You are currently viewing our forums as a guest. By joining our community you gain access to post topics, communicate with members, upload your photos and access many other special features. Registration is fast, simple and free so why wait, join our Mustang community today! If you have any problems with registration or your account login, please contact support.
So im going to be changing my 1988 302 thermostat and i noticed in a few videos on youtube of people replacing it. They use some sort of sealer on the housing that they put the gasket over once they've replaced and are ready to put everything back together. They use some sort of silicone? or rtv sealer?
So before i replace my thermostat, can anyone recommend the proper sealer i should use to seal this thing right please.
If you use one don't use the other. It always works best with either just the gasket or just the rtv.
Once you go ultra black you never go back.
__________________
1989 Sonic Blue Mustang LX Coupe, 349 ci, TW heads, TFS Track Heat intake, 75mm Accufab TB, 80mm ProM, 30 lb inj., Jay Allen cam, TKO, 3.73, 31 spline w/ TruTrac, MAC 1-5/8" LT headers w/ h-pipe, 2-1/2 flowmaster, electric fan oh and a Moates QH 392 rwhp 424 rwtq....Mustang Dyno
"There are three kinds of men. The one that learns by reading. The few who learn by observation. The rest of them have to pee on the electric fence for themselves." -Will Rogers-
Iv found what works the best is to yes clean the surface very well where the gasket lays. Be careful not to ruin the surface with sandpaper, razor blade, etc..very easy to make the surface uneven. If you look closly there are little levels where the thermo and gasket lay perfectly. Next take the smalliest amout possible of the gasket maker and put it on the lower intake where the gasket would lay. You only want to use it for the gasket to stick in place. You just want it sticky not globbed on or even a layer. Just sticky enough for the gasket to stay. If anything put three pin size dots of the goo. thats all you need. Then continue the rest of the procedure like you would normally. If its going to be cold where you live i would suggest not putting a 180 thermo in for the winter. Your car will never get up to running temp and winter. not good!!!! A lot of people make that mistake. The thermostat is a very cheap part like spak plugs but is very important to your motor like plugs!!!
__________________
98 merc mountaineer short block, E7 heads, b cam, 19lb. EV6 injectors, 75mm tb, 75mm EGR delete spacer, stock maf, screamin demon coil, ford racing 8.8mm. plug wires, autolite #25's, 3.73 rear, refurbed t-5 trans, steeda tri-ax shifter, stage 2 clutch kit, lakewood drag suspension, sve upper and lower control arms, v6 contour fan, bbk shorty headers, bbk catless x-pipe, flowmaster 40s to dumps, 3G 130 alt, welded and bolted subframe connectors
Changing Thermostat and using Sealer? 
