I have a 1991 honda accord my front dimestor dosnt work nor does the rev gauge when i turn on the the cooling system it blows out warm air

purge system might b over charged &check &make sure compressor is running

Check the oil and makes sure there is no sign of milkyness.Also keep a close eye on the radiatior water.Without doing a compression test these are the only things that can indicate a blown headgasket.Also flush the radiator and blow it out/make sure all the cooling fins arent clogged in the front.and Im assuming this model has an electric fan so make sure that when you are sitting at idle it does turn on as the temerature gets warm.

If after a few minutes it is still warm to hot air, try recharging the cooling system. Parts stores sell kits with instructions on how to do this.

Hi, it's likely you have air in the cooling system. Recommend you park on an incline, remove the radiator cap, set the heater on high, start the car and let it warm up until there is flow in the radiator. Fill the radiator and keep it full while the engine continues to run. Look for any bleed ports the system may have either in the hoses or at the attach point housings. Crack any bleeders open to allow any air out. Top off the radiator all the way to the neck and make sure there are no bubbles coming up. Bubbles coming out the radiator are an indication of a blown head gasket. If no bubbles, close the cap. Hopefully this will solve the problem.

Are you using gauges?What are the pressures?And are the cooling fans coming on when ac is on?

Did you check the condensor fan to make sure its working

The first thing you should check is your coolant level. If it is low add coolant. Next start and leave the car warm up to temperture and make sure the coolant is moving, have radiator cap off and watch the coolant. What you are probably going to find is that when the car is warming up or warmed up that the coolant will be low causing an air lock in the system. When the air locks happen you will find a overheat or running hot situation. This is due to air will not cool the sytem you need coolant so when the air hits the sensors under acceleration the gauges go high and cause the check gauge light to come on.

hit the motor with something if it blows harder yhen u will need a new motor

Sounds like a thermostat or cooling system issue. Change the fluid and the thermostat. It will do your engine good so it's money well spent.

yes, replacing the thermostat is definately the first thing i would do