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1991 Mustang LX Overheating Problem

465 Views 4 Replies 5 Participants Last post by  jim293
I have a 1991 5.0 LX and every time I take it on a long trip it overheats and breaks down. We've replaced many items on the car but I feel that there is still a problem. I got the car from my grandmother who let it sit for a couple of years and drove it about once every other month. I'm very concerned and I want my car to last and to stay in shape

So far we've replaced the
-Spark plugs and wires
-Radiator cap
-Air and Fuel filter
1 - 5 of 5 Posts
when the motor is up to temp. check both the upper and lower hoses ...the rad . might be partialy plugged ...
Mustangs Unlimited - The Premier Source for Mustang, Shelby and Cougar Parts and Accessories might be time to upgrade the radiator, you can also check your fan clutch, spin the fan while the engine is not running,if it spins freely without any resistance,could be a bad fan clutch, also stay away from underdrive pulleys they don't turn the water pump fast enough to cool the engine in a daily driver

Check and make sure timing is not advanced.

Pull the plugs out of it and check them.

Oil looks muddy or plugs look rusty = head gasket

Take it to state inspection station and have them use the tailpipe sniffer. Running lean will cause heating.

Take it in for a cooling flush or like the guy said just upgrade the radiator
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