My 91 prelude 2.1 si wont start. Originally it just had an overheating problem. I drove it 300 miles and literally having to stop 2 refill the radiator with water because it overheated. Finally 30 miles away from home my techique came to a stop, forcing me to tow it the rest of the way. Now its dead in my garage and would like some advice on what to fix next. I changed the thermostat, dist cap and rotor, spark plugs and wires, oil and filter, and still wont start. what to do???

Sounds like a fuel delivery problem. Have you checked fuel pressure with a gauge?

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First question is what constitutes "overheating".
Since the car has been parked for years, the thermostat could be sticking closed.
The cooling system could have air pockets and need to be bled.
The water pump may be corroded inside and not pumping enough volume.
If the gauge goes above half way, the fans should start up. But half way should be more or less normal, not hot yet.
I would look at flow problems first, beginning with removing the thermostat and driving it without one for a few days. Also check and see if there is a process to bleed the cooling system of air.

Hello, have you tried to unhook the negative side of the battery for about 10 minutes and then go from there . It should reset the computer completely .

yes fill up the radiator makin sure not to open it wile hot then fill the plastic reservoir that say coolant that you only fill to the fill line you wont have any trouble.

If you overheated it, and then drove it long enough that the engine died, Your engine hay have a bad head gasket, or the engine is now bad. .fill up the coolant in the radiator (water) leave the cap off, and try to crank the engine up, if it tries to push the water out, the engine is bad. A bad thermostat isnt going to keep it from running, although it may be bad also.

Specifications Notes Use only Mercedes-Benz approved fluids

TYPE AF(DEXRON-II (R) Automatic Transmission Fluid) CAPACITY, Initial Refill*: 1982-85 190E 5.5 Liters 5.8 Quarts 1982-92 All w/V8 engines 7.7 Liters 8.1 Quarts 1986-91 190E, 260E, 300E 2.6L 6.0 Liters 6.3 Quarts 1986-91 300 Series 2.6L, except SL 6.2 Liters 6.6 Quarts 1990-91 300SL 6.0 Liters 6.3 Quarts 1992 600SEL 7.7 Liters 8.1 Quarts * Add specified quantity. With engine at operating temperature, shift transmission through all gears. Check fluid level in PARK, and add fluid as needed
diesel TYPE AF(DEXRON-II (R) Automatic Transmission Fluid) CAPACITY, Initial Refill*: 1984-89 190D Diesel 5.5 Liters 5.8 Quarts 1984-85 300 Series w/turbo 6.2 Liters 6.6 Quarts 1986-87 300 Series Diesel 6.2 Liters 6.5 Quarts 1990-93 300D Diesel 5.5 Liters 5.8 Quarts 1990-91 350SD, 350SDL Diesel 6.2 Liters 6.6 Quarts 1992-93 300SD Diesel 6.2 Liters 6.6 Quarts * With engine at operating temperature, shift transmission through all gears. Check fluid level in PARK, and add fluid as needed

sounds like your on the rite track . clean the contacts at the batt and at the starter and get back to me

Do you need a new engine? Or are you talking about a fan motor, or what? If you're referring to the engine, the 91 Prelude had 2 engine choices: the 2.0 liter (1958 cc. known as the B20A5 series, or the 2.1 liter (2056 cc. known as the B21A1 series). Both motos are fuel injected and 4 cylinders. Let me know if this is the information you were looking for. countrycurt0

leaking

radiator could be stopped up, fan not working properly, or t-stat sticking.