Cooling prob

[Kenny laird]

Y mustang seems to continuely gets warmer the longer i sit at idle. As long ad im driving its fine just cant sit att idle to long. I have replaced all hoses thermostat water pump radiator fan can not get it stop geting hot when its warm out. Any help would b greatly appreciated

[236mustang]

Check to see if your radiator fan is kicking on

[Kenny laird]

Its a clutch fan and its bran new

---------- Post added at 01:50 AM ---------- Previous post was at 01:49 AM ----------

Its a 89 mustang saleen

---------- Post added at 01:51 AM ---------- Previous post was at 01:50 AM ----------

I even took to my freinds smog shop and used his sniffer to check for hc in radiator to make sure wasnt head gasket and its fine

[236mustang]

Ahh ok...

What degree is your thermostat?

[Kenny laird]

It has 180 in it now but no matter what thermo i put in its runs fine till u sit and idle then it just keeps getn warm soon as i start drivn it will cool back down

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Im at a loss. If i had hair id b pulling it out haha

[236mustang]

Lol, is your coolant level good?

[Kenny laird]

Yes

[MedxGT]

Radiator needing to be flushed?
Coolant correct 50% / 50% mix?
Water pump worn out and not moving enough fluid?

If it is when it's idling and not moving, then I'm leading toward some kind of airflow issue.

Is the fan clutch engaging when it's hot (raise the idle speed and you should hear the sound of the fan engaged)?

Just some thoughts
Paul

[Kenny laird]

Thanks yes clutch fan and waterpump are new

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Flushed radiator and coolant is 50/50

[MedxGT]

How hot is it getting?

[Kenny laird]

Not sure exactly its stock gage but it get to high end of normal on gage and ill shut it down unless im driving then it cool as i get goin. Enough to were it starts runing like ****

[MedxGT]

Have you changed the drive belt?
If not, I would, if you have, take off the belt and scuff up the water pump pulley. It may be slipping and not spinning the water pump/fan pulley fast enough when the clutch is engaged.

[Kenny laird]

Ill give it a shot willing to try anything. Hadnt tought of that

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And yes its a new drive belt

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Should i use some sandpaper

[MedxGT]

Somehow I think you are not getting enough air though the radiator at slow speed. When you drive the vehicle faster that air is forced through the radiator by the speed of the vehicle, slow speeds is when you need that extra help sucking air through.
Good luck

[Kenny laird]

Thanks

[MedxGT]

Sand paper, emery cloth, steel wool. Just something to scuff the surface of the pulley when the belt contacts it.

[Trojan Horse]

Is your belt on so it turns the water pump in the correct direction?Has the water pump been replaced and is it the correct one?
5.0 HO water pumps turn backwards compared to other Ford engines.
If you have the wrong one installed or it is not being turned in the correct direction you will definitely have heating issues.

[Kenny laird]

Yes i am sure its the right pump and is turning the right direction.

[Kenny laird]

So the fan is supposed to engage at idle and slip at highh speed correct?

[Travis B]

I am having the exact same prob. At idle it will reach over 200 and then I shut it off. At cruising speed I am at 180.

[Kenny laird]

Its driving me crazy. I have replaced everything water pump radiator hoses sensor clutchfan thermo nothing helps im loosing my mind

[deadsp0t]

Originally Posted by Kenny laird

Its driving me crazy. I have replaced everything water pump radiator hoses sensor clutchfan thermo nothing helps im loosing my mind

Maybe the problem is with the sending unit or the gauge it self.. Have you tried an aftermarket gauge to confirm the temp your seeing is correct?

[Kenny laird]

No i wouldnt think it would b wrong only at idle. And i know its hot couse it start runin like crap

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If its not hot outside it will sit at 180 all day long

[dreamstang]

I think its the radiator. If your fins are bent you won't get proper air flow through them. Or it could be filmed up inside. I would try flushing it out real good and then straightening the fins if they are bent.

[Kenny laird]

Thanks but i have dine it. Even moved up to a 3 row radiator

[deadsp0t]

Thermostat can be in backwards.. Also could have an air pocket in the system likely in the intake at the highest point. It can show the symptoms. They can be a pain to get out and they can cook an engine.

[Kenny laird]

I have let run with cap off to get air out but if there is a air pocket how do i get it out

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Now im thinkn about that. Spring side in block right?

[Trojan Horse]

Originally Posted by Travis B

I am having the exact same prob. At idle it will reach over 200 and then I shut it off. At cruising speed I am at 180.

There's your clue.
At idle you probably have one of two issues.
1. Not enough air flow.
2. Not enough coolant flow.


There are two other problems that can cause overheating, but they should be evident at speed too.
1. Timing is retarded.
2. Fuel system is leaning out the engine.

[Kenny laird]

Ok so i instaled a nice electric fan set up today seem to b workn good but wasnt very hot today when i finaly finished. Gonna b a warm one tomorrow we see what happen i realy hope this helps. Fan is rated at 3300 cfm

[Kenny laird]

So its hot here again and now back to same old overheating probs. im at a complete loss. Everything on coolant system is new Even hit the smog shop and used there sniffer to check for blown headgasket. Car gets up to about 210 and then i shut it down. 😖

[dreamstang]

sid you check your timing?

does it only do it when sitting idling?

you can try flushing the radiator to.

[Stang.racr]

Wow you got a whole new cooling system, ever tried water wetter or related items? I wouldn't say it would fix what is wrong with your car but it could help you for the rest of the summer

[Kenny laird]

Yes timing is right have flushed many times Can sit in driveway with cap of it will stay at 180 when i put cap on and drive it gets hot. Yes have tried water weter Have pressure checked system Found one small leak. But still same outcome always gets hot

[dreamstang]

maybe try a high flow thermostat? summot racing sells them pretty cheap.

http://www.summitracing.com/search/M...low+thermostat

[Kenny laird]

Thinkn maybe a highflow pump to. I put a new one but its from kragen Prob was bad idea shoulda went highflow from the gate