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Author
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Topic: MUSTANG overheating. Help...
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NorCalRydaz
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Member # 3233
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posted
 
 
What's up. I have a 1989 gt. Has a fresh 306 with about 6k miles. I bought a new radiator, radiator cap, waterpump and thermostat(160) and it still over heats. It's like 2 lines below 270. It's always between the "N" and the "R" on N O R M A L. I'm thinking of just taking the thermostat. Any suggestions would help!
Posts: 2963 | From: San Jo | Registered: Sep 2003
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forced331
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Member # 1270
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posted
You might have a blown head gasket? Check your sending unit to make sure the gauge is accurate.
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1992 Ford Mustang LX (Original Owner)"Titanium Frost" 331stroker S-Trim, 5spd
2014 Ford Mustang GT- daily driver
Posts: 1154 | From: Sonoma County | Registered: May 2002
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BUCK_FIFTY
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Member # 728
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Are you overflowing coolant when you overheat or are you just running hot? If coolant is disappearing but you are not overflowing you might need to check head gaskets.
Posts: 789 | From: 510 | Registered: Jan 2002
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NorCalRydaz
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Member # 3233
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posted
I'm just running hot. But coolant is still there. It's doesn't disapear.
Posts: 2963 | From: San Jo | Registered: Sep 2003
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forced331
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Member # 1270
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What kind of thermostat did you install? If its a superstant, replace it. I had nothing but bad luck with that stat. I went through three of those at 160 degrees and all three never opened till 210 degrees. You could try replacing the sending unit.
If everything checks out good, then look at the worst like a head gasket.
If your coolant resevior is boiling or rising up after driving conditions or when hot, it might be an indication that your head gasket might be starting to go.
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1992 Ford Mustang LX (Original Owner)"Titanium Frost" 331stroker S-Trim, 5spd
2014 Ford Mustang GT- daily driver
Posts: 1154 | From: Sonoma County | Registered: May 2002
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stoauto
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Member # 2803
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posted
yeah dude, i'm thinking head gasket like everyone else, and dont use those cheap ass thermos, buy a good one, like Mr. Gasket. from summit or some shit. most thermos dont open until about 10 deg. or more from what there rated, actually, i got a MR.GASKET 160 thermo, sitting in my garage, almost brand new, and its garaunteed to open at what its rated at. if you want it, lemme know, but i still think its a HG, or maybe your water pump.
Posts: 1054 | Registered: May 2003
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NorCalRydaz
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Member # 3233
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fuck.. I just put in new head gaskets like 6k miles ago. Waterpump in brand new(edelbrock aluminum). So u guys you think maybe I tourqued down the heads gasket on too tight when I installed my heads? I going to remove my thermostat today and see if it makes a difference.
Posts: 2963 | From: San Jo | Registered: Sep 2003
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stoauto
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Member # 2803
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coolant maybe disappearing, just slowly. check your oil, check that little hole on the bottom of your water pump, if coolant is leaking out of it, replace it. keep tabs on the coolant in you overflow.
Posts: 1054 | Registered: May 2003
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stoauto
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Member # 2803
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did you re-surface your heads? i ALWAYS surface my heads, i dont give a fuck if i JUST put them on, if i take them back off even after like 1 minute of run time, there gonna go get surfaced. its GREAT insurance that there flat. lots of folks dont do this. maybe i'm paranoid. ![[Frown]](frown.gif) ![[Razz]](tongue.gif)
Posts: 1054 | Registered: May 2003
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stoauto
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Member # 2803
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what did you torque them too? a little too tight wouldn't hurt anything.
Posts: 1054 | Registered: May 2003
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NorCalRydaz
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Member # 3233
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My dick head friend told me to torque down the heads so I did. First thing I checked was waterpump so I just bought a new one. When I turn off my car i can hear the coolant going into the overflow tank. What's that mean? So u guys think if I remove my my thermostat it won't make a difference?
Posts: 2963 | From: San Jo | Registered: Sep 2003
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stoauto
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Member # 2803
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i would replace my thermo, not remove it. but i still think its your HGs i'm known to be paranoid. ![[Big Grin]](biggrin.gif) kragen sells some good fel-pros, there like 20$ each. OH and did you put THREAD SEALANT on the shorter bolts? as they screw straight into the coolant passages.
Posts: 1054 | Registered: May 2003
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stoauto
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Member # 2803
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did you scrape ALL the old head gasket off the motor befor you put on new ones?
Posts: 1054 | Registered: May 2003
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NorCalRydaz
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Member # 3233
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Yeah I scraped all that old shit off. But didn't use thread sealent. I also use fel-pro gaskets when I put it on. Now that I remember... I remember seeing krusty ass old coolant in the ports of my lower Cobra intake. Could it also be that? It almost looked like old bread in there. I scrape most of what I could reach. It was hell of it!
Posts: 2963 | From: San Jo | Registered: Sep 2003
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JohnB
Tech Moderator
Member # 969
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posted
When you put the heads back on, did you put sealant on the lower head bolts? If not, there could be the problem.
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1965 Shelby Cobra
1993 Cobra
2012 F150 Raptor
2020 GT500
Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002
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stoauto
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Member # 2803
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posted
quote:
Originally posted by NorCalRydaz:
Yeah I scraped all that old shit off. BUT I DIDNT USE THREAD SEALANT. I also use fel-pro gaskets when I put it on. Now that I remember... I remember seeing krusty ass old coolant in the ports of my lower Cobra intake. Could it also be that? It almost looked like old bread in there. I scrape most of what I could reach. It was hell of it!
there you go. pull your heads off, get them surfaced, and put thread sealant on the lower bolts.
[ June 02, 2004, 10:16 AM: Message edited by: stoauto ]
Posts: 1054 | Registered: May 2003
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DaveG
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Member # 1606
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Hmmm...back to basics. Do you have a mechanical fan? If mechanical, make sure your fan clutch is drawing air through the radiator.
Posts: 112 | From: San Jose | Registered: Jul 2002
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NorCalRydaz
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Member # 3233
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mechanical... Not sure. Fan is cracked and stock and has 170k miles on it!
Posts: 2963 | From: San Jo | Registered: Sep 2003
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FordPny
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Member # 510
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I had this problem only cuse the coolant mixture wasnt 50/50. I added more coolant and never gets hot anymore.
Posts: 2458 | From: San Jose CA | Registered: Oct 2001
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NorCalRydaz
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Member # 3233
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ok check this out. I was at a light and it's right at half way then as I continue to wait it starts to heat up! I'm going to change my fan/fan clutch in 45mins so we will see what happens.
Posts: 2963 | From: San Jo | Registered: Sep 2003
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NorCalRydaz
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Member # 3233
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posted
can someone tell me where the sending unit is. I just put in the fan and it still over heats!
Posts: 2963 | From: San Jo | Registered: Sep 2003
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forced331
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Member # 1270
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posted
Its on the lower intake manifold towards the front on the drivers side with one wire connected to it and its brass looking. There pretty cheap to replace.
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1992 Ford Mustang LX (Original Owner)"Titanium Frost" 331stroker S-Trim, 5spd
2014 Ford Mustang GT- daily driver
Posts: 1154 | From: Sonoma County | Registered: May 2002
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NorCalRydaz
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Member # 3233
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posted
Thanks everyone I figured it out
Posts: 2963 | From: San Jo | Registered: Sep 2003
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stoauto
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Member # 2803
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so what was the problem? just the sending unit???
Posts: 1054 | Registered: May 2003
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166 Merlo
FELONY
MOTORSPORTS
Member # 1549
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posted
so i read the whole thread, and u figured out what the problem was, BUT YOU DIDN"T TELL US?!?!
booboo
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'89 - Boss Coupe
'70 - Drop Cutthang
'68 - Cougnut
'87 - 0166, Its real
Posts: 3954 | From: Thebay | Registered: Jul 2002
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