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Author Topic:   Tell me what I did wrong.
67stang
Gearhead

Posts: 1089
From:
Registered: Jun 99

posted 05-31-2002 08:37 PM     Click Here to See the Profile for 67stang   Click Here to Email 67stang     Edit/Delete Message   Reply w/Quote
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

posted 05-31-2002 10:16 PM     Click Here to See the Profile for MLariviere   Click Here to Email MLariviere     Edit/Delete Message   Reply w/Quote
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

posted 06-01-2002 11:04 PM     Click Here to See the Profile for 67stang   Click Here to Email 67stang     Edit/Delete Message   Reply w/Quote
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

posted 06-25-2002 02:10 PM     Click Here to See the Profile for DidgeyTrucker   Click Here to Email DidgeyTrucker     Edit/Delete Message   Reply w/Quote
An engine that has been over-bored will almost always run a little hotter than before.

Tracy

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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

posted 06-25-2002 02:42 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
You built it to have more power, also. Heat is a byproduct of power.

------------------
'70 Mustang Mach 1, '72 Mustang Sprint, '94 F-150
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67stang
Gearhead

Posts: 1089
From:
Registered: Jun 99

posted 06-25-2002 08:55 PM     Click Here to See the Profile for 67stang   Click Here to Email 67stang     Edit/Delete Message   Reply w/Quote
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

posted 06-26-2002 09:55 PM     Click Here to See the Profile for MLariviere   Click Here to Email MLariviere     Edit/Delete Message   Reply w/Quote
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

posted 06-26-2002 11:19 PM     Click Here to See the Profile for 67stang   Click Here to Email 67stang     Edit/Delete Message   Reply w/Quote
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

posted 06-28-2002 09:48 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
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

posted 06-28-2002 10:08 PM     Click Here to See the Profile for MLariviere   Click Here to Email MLariviere     Edit/Delete Message   Reply w/Quote
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

posted 06-28-2002 10:23 PM     Click Here to See the Profile for 67stang   Click Here to Email 67stang     Edit/Delete Message   Reply w/Quote
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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