Overheating problems

rd68 · #1 Jun 13, 2006, 02:05 AM

I have a 86 mustang lx 4 cil. engine and it keeps overheating i've replaced belts radiator cap and thermostat i've flushed the radiator and checked for leaks around the thermostat houseing and water pump but found nothing.Does anyone have a clue of whats going on.Or what i should check for next.

Vandy-1 · Jun 15, 2006, 01:03 AM

If your belt is not slipping and there are no leaks and the system can
build up pressure than the only other thing to check would be the fan.
Check that the blades are not loose or damaged and if you have a fan clutch
ensure it is engaging.

educatedhorse_2005 · Jun 15, 2006, 03:37 AM

Maybe your water pump is going bad.
They are cheap and if you can do the work.
Just change it out and see if it solves your problem.

rd68 · Jun 15, 2006, 04:39 AM

Quote:

Originally Posted by Vandy-1

If your belt is not slipping and there are no leaks and the system can
build up pressure than the only other thing to check would be the fan.
Check that the blades are not loose or damaged and if you have a fan clutch
ensure it is engaging.

Thanks for your reply?All belts are tight and my fan comes on but i haven't checked it to be loose or damaged i'll do that.

rd68 · Jun 15, 2006, 04:41 AM

Quote:

Originally Posted by Demonspeeding_2005

Maybe your water pump is going bad.
They are cheap and if you can do the work.
Just change it out and see if it solves your problem.

I checked the water pump but didn't see any leaks.Thanks for your reply.

Dr D · Jun 15, 2006, 10:00 AM

Check your ignition timing. If it is too far advanced it could cause overheating. Check your lower readiator hose when cold to see if you can collapse it by hand. There is usually a coiled wire in the hose to keep it from collapsing because of the suction of the water pump. If that wire rots away, it could allow a restriction in that hose. Check the front of your radiator fo a buld up of crud that might restrict air flow through it. This build up of crud can be especially hard to spot in cars with AC, because the AC condenser sits in front of the radiator, and you can't even see the front of the radiator. I have seen instances where a plastic bag was stuck between the condenser and radiator. Obviously you have checked your water for the presence of oil (usually a white froth) that would indicate a blown head gasket. Good luck.

rd68 · Jun 15, 2006, 10:11 AM

Thanks i'll try those things.

educatedhorse_2005 · Jun 15, 2006, 05:59 PM

even if it is not leaking doesn't mean it not going bad

v-star · Jun 16, 2006, 05:21 PM

1986, when it starts to over heat try turning on the heater blower on high and see if this cool thing down a bit if it does, sounds like you have a rad problem even though you have flushed it is still could be plugged and not letting enough coolant though the tubes, take it out and take it to rad shop and check the core

shunned · Jun 17, 2006, 07:30 AM

Also, if your radiator fan is thermostatically controlled (goes on and off at idle)
your thermostat that controls the fan may be bad.



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