My son just purchase a 1987 Nissan Pathfinder. It has started overheating and is now blowing fluid out of the inside AC Vents. Can you tell me what causes this problem and what it would take to fix it?
Re: Engine overheating and blowing fluid out of vents
Fluid coming out of the vents indicates a faulty heater core, but this does not explain the overheating problem. The blown heater core may only be the result. Check the coolant level.Check for coolant leaks primarily at the water pump. Check the thermostat by insuring both hoses to and from the radiator warm up. Check for foamy oil or white smoke from the exhaust indicating a blown head gasket or cracked head. Check to ensure your cooling fan is working.
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not sure but this has a carburetor(to early for injection) and its supplying too much fuel to the engine.the carb will need to be rebuilt or replaced.if it has injection then it could be bad or dirty injectors a bad fuel pressure regulator allowing too much fuel into the cylinder.if it is injection then it will have a computer and the check engine light should be on and if its running this rich then the 02 sensor should be replaced as well.these are what can cause your problem and you will have to run the car hard for a while to clean out the excess fuel in the exhaust.
Low fluid, Clogged Filter, Time for a Filter and Fluid Change, bad Pump in the transmission overheating or bad Torque converter. Your going to have to take it to a shop to be sure. if the over temp lite comes on but the transmission is working fine it may also be a faulty sensor.
That could be a few things but we need to find out if it is fuel related or electrical related. A quick way to find out if its fuel related is to spray some starter fluid in the breather for 3 seconds. If it starts and go dead it is fuel related. Do this test a couple of times and you should get the same results. It should runs a few seconds and then go dead.. Fuel related issues means fuel pump and filter needs to be changed. and some times fuel pressure valve. Try this first Good Luck!!!
FIRST TRY TO SEE IF THE FUSE AND RELAY ARE FUNCTIONING PROPERLY. IF THEY CHECK OUT THEN CHECK FOR SPARK AT EACH ONE OF THE SPARK PLUGS. IF YOU ARE GETTING SPARK THEN I WOULD REPLACE THE CRANKSHAFT POSITION SENSOR. THIS DEVICE IS RESPONSIBLE FOR OPENING INJECTORS AND SPARK PULSE THROUGH THE COMPUTER. HOPE THIS HELPS. PLEASE LET ME KNOW. BEST OF LUCK
I have a feeling you have the transmission extremely over full. I actually am pretty familiar with maintenance service. When you drain the system off the pan you only retrieve about 35% of the fluid. I would start by checking the level on the stick agian and confirm it. If its over full drain it agian and add 4 qts for starters. Start the truck and with the brake pedal compressed place gear selecter in each gear for 10 seconds then return to park and check level agian. Total transmission capacity is 9qts. and the preferred fluid is DEXRON III / MERCON.