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Author
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Topic: Tell me what I did wrong.
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67stang
Gearhead Posts: 1089
From:
Registered: Jun 99
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posted 05-31-2002 08:37 PM
   
OK, so now that my motor has just over 1000 miles on its rebuild, I decided I can tow with it. (1990 F150, 302, AOD) And here in Florida its getting to the point I am actually using AC when I drive the truck.When running, the temperature guage will rise to the point it always has. As long as I am running with windows down, or the heater on (its still cold at 4 in the morning) it (the temp guage) is fine. But as soon as I turn the AC on, the temperature will creep up til the needle is just about verticle. And if I haul anything with it with AC on, forget it. I was doing 60 mph Monday with the AC on (no trailer) just camping equipment in the bed) and the needle went past verticle. Did I do something wrong when I rebuilt it? Forget to punch out some holes in a gasket, like on the CJ-5? Can someone help me? btw- if I don't respond to a question or comment in a timely fashion it is becuase I don't have a phone line. Right now I am at the in-laws with my laptop. keith
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MLariviere
Moderator Posts: 2538
From: Biddeford,Me.USA
Registered: May 99
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posted 05-31-2002 10:16 PM
I don't think you did anything wrong. My truck runs straight up all the time. When I carry the plow it will push into the end zone,but it doesn't go over. Are you sure you have a clean{internally} radiator? If the head gaskets were wrong,it wouldn't take long for it to puke,and violently. You wouldn't be able to drive it. The only thing I can recommend,it to spend more money.  Get a true readout temp guage,maybe go down 10* on the thermostat,and even get the biggest radiator you can find. Then just watch the guage. I can pull a trailer,with a car on it,running AC for 200 miles in 85 degree weather. You should be able to too. I do have a heavy duty cooling option on the truck,though.
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67stang
Gearhead Posts: 1089
From:
Registered: Jun 99
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posted 06-01-2002 11:04 PM
I wasn't thinking when I did it, and I installed a 195* thermostat. But that should just make it heat faster, but not overheat. I will replace it.The guage never ran past a quarter of the way up when it was runnning before, and thats why it bothers me. That, and it wants to climb up while the AC is on. I can't swear the radiator is clean, but I believe it is. On the CJ5, the head gaskets were correct, but there was a dime sized hole that needed to be punched out.
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DidgeyTrucker
Gearhead Posts: 760
From: Nashville, TN USA
Registered: Oct 99
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posted 06-25-2002 02:10 PM
An engine that has been over-bored will almost always run a little hotter than before.Tracy ------------------
Tracy M&M #245
MAC OS9
1956 F-100 Panel w/429
(3.50 9")
1966 F-100 SWB w/351C
(3.25 9" - 3.70 posi for Saturday nights)
Music City F-100's,
1965 GT-350 S/C
(2.78 1st & 3.70 TracLok 9")
Music City Mustang Club
Don't focus on the destination....make the JOURNEY the adventure
Visit my Web site: DidgeyTrucker's Website
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SteveLaRiviere
Administrator Posts: 24286
From: Saco, Maine Toys: '70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150
Registered: May 99
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posted 06-25-2002 02:42 PM
You built it to have more power, also. Heat is a byproduct of power. ------------------
'70 Mustang Mach 1, '72 Mustang Sprint, '94 F-150
Pics
MCA Member # 47773
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67stang
Gearhead Posts: 1089
From:
Registered: Jun 99
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posted 06-25-2002 08:55 PM
Steve, I agree.  But I would like to be able to use the AC while I am in this state. Further testing may be necessary.  edit:
One more thing, as long as I am pondering. I go to work with the AC on, and I am not going above 45 mph, but I get the verticle needle. With me so far? When I get to work (or home depending on which way I am going) the truck will not immediately restart. Thoughts? I find it odd, because my mustang now does the same thing. Like the starter is too hot to turn. Hmmmmmm......... [This message has been edited by 67stang (edited 06-25-2002).]
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MLariviere
Moderator Posts: 2538
From: Biddeford,Me.USA
Registered: May 99
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posted 06-26-2002 09:55 PM
Are you running headers? That would affect the starter. I would get a true temp guage,if I were you. The factory one is a big guess.
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67stang
Gearhead Posts: 1089
From:
Registered: Jun 99
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posted 06-26-2002 11:19 PM
No headers. And only factory guages for now. Am looking at putting a oil pressure/temp/voltmeter cluster in there.
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SteveLaRiviere
Administrator Posts: 24286
From: Saco, Maine Toys: '70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150
Registered: May 99
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posted 06-28-2002 09:48 PM
Now you just need to increase your cooling capacity to match the increased power. Genie Steve sees a larger radiator and a transmission cooler in your future. You have a clutch fan, right? ------------------
'70 Mustang Mach 1, '72 Mustang Sprint, '94 F-150
Pics
MCA Member # 47773
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MLariviere
Moderator Posts: 2538
From: Biddeford,Me.USA
Registered: May 99
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posted 06-28-2002 10:08 PM
Have you boiled it over yet? I'm sure you must know where it goes over,from the last time. It was violent,wasn't it?Another thing to know/check is the water pump. The older ones differ from the ones with a serpentine drive system. The vanes go in opposite directions. I'm sure,though,that wouldn't run long. Just like a backwards head gasket. [This message has been edited by MLariviere (edited 06-28-2002).]
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67stang
Gearhead Posts: 1089
From:
Registered: Jun 99
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posted 06-28-2002 10:23 PM
Haven't boiled it over yet, and I hope not to. When it (the truck) got uncomfortably warm, I rolled the windows down and turned the AC off. And the temp dropped right down to about verticle and stayed there.I replaced the water pump at 30 miles after rebuild. My new one was leaking already. I guess I am just worried I did something wrong.
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