Question about 1986 Honda Prelude

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I had a bunch of steam coming off the engine and coolant spilled all over the place and i found a hose with a hole so i replaced the hose and drove it for about 20 minutes and then it just started running hot again and steaming off the engine. i replaced the ect sensor about a month ago because it would idle out after driving for 10 minutes or so and it ran fine until now. no steam or fluid is coming out of the radiator. any clues?

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The thermostat could be stuck closed.
The worst case is you over heated the engine to the point you could have internal damage to the engine . I would change the thermostat first. IF that does not work , I would take to a shop to have checked out.

Posted on Jul 14, 2009


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Replacing thermostat

Easy to do at home. Requires the Coolant to be drained. My symptom was that the car took forever to warm up and the faster I drove the cooler the engine got which sucked in the winter.
1) Locate the Thermostat housing which is located at the front of the Engine, Passenger side, under the Air Conditioning compressor.
2) With the Cars engine cool, place a container under the engine where the Thermostat housing is located.
3) Loosen the Radiator hose clamp on the Housing, and pull off the hose from the housing. NOTE Coolant will start to gush out just make sure that the bucket or container is catching the coolant to avoid any spills. Removing the Coolant cap will make the coolant drain faster.
4) Remove the 2 bolts which hold the housing on the engine block. NOTE Coolant will start to gush out just make sure that the bucket or container is catching the coolant to avoid any spills.
5) remove the old thermostat, you will probably notice under inspection that there are some pieces of rubber seal missing on the valve which allow the coolant to bypass the valve, not good at all.
6) Replace the thermostat with one of equal temperature rating. Also replace the o-ring on the Housing while your at it, most replacement themostat kits have this included.
7) Make sure that the engine block surface where the housing sits is clean, and reinstall the Thermostat and Housing and Radiator Hose.
8) Fill the Coolant resevoir with GM approved Dexcool coolant.
9) Start the engine and check for leaks. Turn off the engine then top off the coolant again. Just be sure to remove the Coolant Resevoir CAP SLOWLY to equalize the pressure or you can get splashed with hot coolant BE CAREFUL!

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