That's easy actually i don't really know haha sorrry you guys *blushes*
Most older Chevy silverados use a rubber gasket around the thermostat itself... the upper housing also has a rubber gasket built into it. Did you move the gasket from the old one & put it on the new one? There is also a paper gasket you can use, but you need a lot of permaseal & it isn't as good. Most parts store will have the rubber gasket & it's about $1.00
You do not "lube" the gasket with anything. If it is a flat paper gasket, you can use any shelac type sealer, but you don't have to as these will usually swell with contact with coolant and seal. If it is the kind that is a rubber ring around the thermostat itself, these require no sealant as pressure alone seal the housing to the motor.
It is in a housing in the engine end of the upper rad hose. Just take it out and when you go back with it make sure the spring goes toward the engine. **Additional: The thermostat comes with a rubber ring to seat and seal the part into the counterbored holder. The paper gasket included with the thermostat should also be used as a spacer to maintain proper alignment of the pipe flange that is bolted over the thermostat. If the paper gasket is not used, the pipe flange will be bent into a slight arc because the rubber gasket is quite thick. Don't let the parts guy tell you that you don't need the gasket because of the O-ring. It's because of that O-ring that you do need the paper gasket.
Thermostat. First, drain the radiator at least part way so the coolant level is below the thermostat housing. In most motors, it is where the top radiator hose connects to the motor. There is a dome over it with two or three bolts holding it down. Take the bolts out and gently pry the dome off. Some have a rubber gasket around the thermostat and will just lift off. If there is a paper gasket under the dome, clean it and the top of the motor of the old gasket, replace the thermostat and gasket using gasket sealer on both sides of the gasket. Put the dome back on and refill the radiator.
I am going to assume that by water inlet, you mean thermostat housing. If the new gasket is a paper like material then by all means do so. Don't over do it, just a ultra thin coat on both sides to make it stick to the surface of the housing and /or engine. If it is paper like with a rubber o-ring inner flange than no. Final note, ensure that you purchase the correct tube of permatex (High Temperature) the back of the package will state (water pump/thermostat). V/R SSG Sadosky, USA Armymech/Fordtech
I just did mine. It is located at the front of the engine under the alternater. You will need to open the peacok to drain the radiator fluid. I believe that is located at the lower drivers side of the radiator. Where the thermostat is located will be two bolts, 10mm I believe. remove these two bolts. The two metal pcs will now come apart. Take out the thermostat. Clean the two metal halves where you removed the thermostat from (from dirt and debree). You will need a small round gasket the just goies around the thermostat piece itself. There is no paper gasket needed. Put this small gasket around the thermostat, and I also used some high temp gasket maker also. Putting this just around the rubber gasket the you installed around the thermostat. Now insert the thermostat, level and straight in. Connect the two halves together (lever and straight) and tighten the two bolts. Put in new coolant and ready to go.
The thermostat gasket for a 1990 Mercury Grand Marquis is the standard "paper" type gasket, and a good RTV silicone is recommended. Permatex makes a sealant well-suited for the purpose - it's called "Water Pump and Thermostat Housing Sealant". You can also use similar sealants, such as Permatex Ultra Grey, Ultra Blue, or Ultra Black.
yes gasket paper
Most but not all car thermostats are fairly easy to install. Find the top large hose from the radiator and follow it back to the engine. Usually, if you unscrew the two bolts holding the hose into the engine block there is a thermostat. NOTICE THE DIRECTION OF THE ORIGINAL THERMOSTAT, so you don't put it upside down. Clean all the old paper gasket, replace the gasket, a little gasket sealing compound around the area to be sealed and tighten it back together. Good luck.
Some paper can be harder than some rubber. There are too many types of both paper and rubber to make a generalisation.
You should use whatever the car manufacturer calls for...some want paper, others rubber or plastic, and still others want you to use sealant.
It is located in the housing that the upper rad hose goes to on the top of the engine. 2 bolts to be removed and the thermostat is right under it. Be sure to look at where the bleed hole is if equipped and install in the same spot. wax side down bleed hole forward. and read the TSB ( a rule for all car made) and note the type of rim used on the lower housing./ 1mm old, use paper gasket 4mm new, use rubber surround gasket and no paper buy both gaskets and not waste time and fuel before the work. world wide web dot kick-fix dot com (<dig?)