if not the water pump or the thermostat why would my motor still over heat? other than being blown.?

Question

only takes about 10 minutes to overheat

Answer 1

Honeycombs in catalictic converter melted or clogged. Exhaust system damaged or clogged. Radiator clogged. Fan not working. Thermostat improperly installed. Coolant old or not enough. If engine is newly rebuit it will get hotter.

Answer 2

Without motor type, year, etc. hard to say. I had a small block chevy that would overheat quickly like that. It had a clutch fan for cooling the radiator. It was turning but little did I know then, it wasn't turning fast enough, with the clutch in the fan slipping. I put a direct old style fan on and the motor stayed under 200 degrees.
Are you getting water in the oil? Check oil dipstick for a white residue. Is the water flowing? On some older cars you can start them and see the water flowing in the radiator. Don't try that if the engine is already hot.
Some newer GM cars had a cross-over pipe that ran under the engine, and if the car had ever bottomed out, like going over a speed bump, it would hit and get smashed shut. Typical of the mid to late 90's, Grand-Ams an such.

Answer 3

If its truly over heating and not just the sensor in ten minute the only thing that would cause this is a blown head gasket cracked head or cracked block.If it was the stat it will take about 1/2 an hour to boil over. Plugged rad would take even longer. Heater core will not cause an overheat unless it leaks. Water pump impeller worn could cause an over heat like this but you should have heard some noise before it went.Sounds like the head gasket to me make sure you have the head milled and checked for cracks. Also inspect the block for cracks ( this is not common but can happen )
Hope I helped and good luck

20 years as a GM tech

Answer 4

Is it a true boil-over over or is the meter just running up high?
10 minutes seems awfully quick for the water to fully boil over,
> If pressure is building under the cap, you might have a blown head gasket that's pressurizing the system to make you think it's heat pressure.
> Plugged radiator. Build up inside could cause the radiator to not work properly.
> Mis-routed serpentine belt causing the pump to spin backwards.
or I'm thinking you have a bad sensor.
Are you sure the pump and thermostat are ok?
Thermostat could be in backwards.
Pump could be cavitating. (worn fins)

Answer 5

the radiator could be clogged! after running a few moments try to feel the lower center of the radiator core and see if its cooler than the rest of the radiator' if it is then the radiator is clogged.
if thats not the case then you could have a blown head gasket' this will cause an overheat' also a cracked cylinder head will cause an overheat condition, check to see if you have excessive white smoke and or bad smell from the tail pipe when its hot!if so then you have a head or gasket problem. also check to see if your cooling fans are working properly' especialy if there electric.
if you need profesional assistance email [e-mail] hes a great mechanic and reasonable. hope i helped'

Answer 6

Has the pipe artwork being altered in view which you final used the heater? you could make effective that coolant is working in the process the heater matrix no depend if that's is there an airlock? Is the heater valve commencing off once you turn heater too warm place? final yet no longer least heater matrix would desire to be blocked. heat the engine up with the heater became to finished on and squeeze the pipes see while they are getting warm, that is basically incredibly an undemanding plumbing exercising except of direction you could take the dashboard out to get to the heater. sturdy success, Gizz.

Answer 7

Blown head gasket check for water in the oil
cracked block ..water in oil
Plugged radiator run car with cap off and check for flow.
Also look for bubbles in the radiator a sign of blown head gasket.
And if you have a radiator pressure tester throw that on and see if it leaks anywhere. 10 min. to overheat there has to be a plug somewhere mostlikley your radiator is plugged. If the car smokes thru the tailpipe (white smoke) its a head gasket or cracked block.

Answer 8

Flushing isn't going to help a clogged radiator. That's preventive maintenance, not a cure. If it heats up to regular temperature in about the normal time, and then keeps getting hotter, it's probably a clogged radiator that needs to be replaced.

Answer 9

start engine let it run for a few minutes locate the upper radiator hose feel it if it is hard with pressure and engine is cold it is possible to blow a head gasket make sure rad is cleaned no rust or clogged. it is possiblehtere is not enough antifreeze in system

Answer 10

try bleading the system to get the antifreeze flowing correctly check if you have the propper mixture of 50/50 of water and antifreeze also check if you have heat sensors and an electric fan if one of the sensors are bad this will not let the fan come on and will not cool the radiator to cool the engine