Tuesday, September 20, 2011

Why would my car keep overheating?

I have changed the thermostat, new relay, new fuse, and the coolant is not low. The fans are working properly, and there is no leak under the car. It is also not leaking into the oil. HELP!!!
Why would my car keep overheating?
Gummed up radiator, or possibly a collapsing radiator hose. You can have the radiator flushed with a special chemical additive and see if that helps, change out the main hoses while your in there.
Why would my car keep overheating?
Check and make sure your fan is coming on and bleed the cooling system.
blocked heater core will cause coolant not to flow
Are you checking the coolant level when cold, at the radiator cap.

You have to check the water pump to see if it's working.

Could be blocked radiator.

Couldn't be blocked heater core.

Clean detris from in front of radiator.
That leaves the radiator to check out. The cooling fins might be obstructed from debris from engine block. You can get it rodded out, but you might need a new radiator, if it's old, and full of deposits.
you may have air in the cooling system.



Bleed your cooling system
Radiators could be blocked/broken, they deal with removing the heat from the engine.
flow problem

1 thermostat in upside down..don't scoff..ive seen pros's do it

2 hoses...can be soft and flatten under pressure,put on glove squeeze when hot, [engine off]

3 water pump...they do wear out without leaking,,ive seen them with blades worn off.

4 engine tune,misfire creates lots of heat

5 engine oil and tranny fluid...keep both clean and full,,,oil helps cool and tranny fluid gets cooled in radiator

6 radiator,,,sometimes they just get crudded up..