1991 corvette my vette is geting hot after driving it i did a raidator presure test and no leaks and it was hot when i did it.. shuld i put a 160 thrmist stat in it ? or is 160 to low?

REPLACE INTERIOR

I have the same problem I replace the Gear in in both or my light go to E bay and researcher repair kit for corvette light , if You to know how repair them log again to Fixya .

You never use a 160 stat

That was a 1960's thing to do,
when there were no computers

I ran a 160 in my 1965 vette, just to see what
would happen.
I had no problems & built my own motors

Your best to go to a shop that has been around for years
in the same place with the same owner

May want to ask a local vette club for a place they use

I don't know when,why ,etc your issues started or the
vehicle history.

Usually a head gasket,if you loosing coolant

Water pump is eaten up inside

Some engines use reverse flow for coolant,
if you just had work done on it

Need to know that product to work on it.

did you try changing cam sensor Had 1995 2500 GMC did the same thing also when you change a cam sensor you should change crank postioning sensor because that will be next thing to go I learned the hard way.

I had to clean the fan relay and works like a charm now....

Your transmission is a 700-R4,(4l60) a speed sensor will cause it to not change gear,the only thing that can do what you describe is the front pump,the reason why I say this is you change the transmission fluid too often.

well there can be three things wrong, If the mechanic actually umped hte fan then there can only be one of two things wrong with it. 1. the fan relay or the fan temperature switch. the relay is the easiest to test as you can just swap it out with the horn relay and try honking the horn. Horn works then its the fan temperature switch. Horn does not work it is the relay.

Good Luck

--Zim--

It sounds to me as though you have a clogged or malfunctioning fuel pump. Depending on the engine in your car, and whether or not the engine has a carb or fuel injection system.

In most of the early 90's corvette's, there should still be a fuel filter on the fuel injection throttle body (it looks like a carb), and a fuel filter under the car on the fuel lines. I believe you'll want to check the passenger side, but follow the fuel lines to find the filter. You might only have one under the car, so don't be alarmed if you don't find a small one on the throttle body.

Try changing your fuel filters first, as this is an inexpensive way to make sure your vette is in optimum condition before you do anything else.

If fuel filter replacement doesn't work, you will want to have your fuel pump tested. The only way to DIY, is to remove the fuel pump from the lower drivers side of the engine and to blow in the "in" side with a little water and see if it puts out the fluid. Even at that it could still be bad, so if you pull the pump, plan on replacing it.

The only other realistic option is that your fuel injectors are dirty or the gaskets are bad and it is time for an injector overhaul. This is not to hard to DIY, but does take patience and attention. You can also try running some fuel injection cleaner through your engine before trying anything else to see if it helps.

Some unlikely options are that your smog pump is clogged, your catalytic converter might be bad, you EGR valve or Purge Valve is clogged, your timing is off and you need to check the spark system, or that you could have low compression.

Your automatic choke is probably sticking. Spray it out with 2+2 Carb and Choke Cleaner. Do this when the car is cold so you don't start a fire. While the car is running see what position the choke butterfly is in when the engine is hot. If it is partially closed you may have a bad spring in the choke mechanism or it may need an adjustment.

those have a vaccum(engine) operated actuator