sudden over heating

65notch

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Jul 24, 2005

#1

• Jul 24, 2005

• #1

my 65 coupe was doing perfect in this 120 degree weather(pheonix az) for the past few months. then she started idleing a lil ruff so i messed with the carb a lil(which i dont really know how to do) and ever since then shes been getting really hot. any ideas of a prob? can haveing the carb adjusted pad cause her to overheat? thanks guys

 

rbohm

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Apr 12, 2002

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Jul 24, 2005

#2

• Jul 24, 2005

• #2

sounds like you have the idle mixture too lean. also where is your timing set?

 

65notch

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#3

• Jul 24, 2005

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rbohm said:

sounds like you have the idle mixture too lean. also where is your timing set?

Click to expand...

i set the timming about a month ago. i dont remember what it was at, and i havnt changed it at all. i dont have a timming light. i have a flex fan and last night i put an electric fan as a pusher which gets alot more air going through the radiator. but she still gets warm

 

65notch

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#4

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i have an edelbrock 4bbl carb with 2 adjuster screws in the front. to richen her up do i unscrew or screw in? what should idle rpm be?

 

gbarber

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Jul 24, 2005

#5

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• #5

The Edelbrock owners manual says go leaner by turning clockwise, and richer by going counter clockwise.

Check out
http://www.edelbrock.com/automotive/index.html
On the left side- click on carburetors, then look under (EPS) owners manuals.
There a section for idle mixture.

 

Max Power

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Jul 31, 2003

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Jul 24, 2005

#6

• Jul 24, 2005

• #6

Unless it's only overheating at idle, I doubt it's the idle mixture circuit. Did you retard the timing when you set it?

 

65notch

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#7

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its only overheating at idle. if i put her in neutral and rev the engine to about 2500 and keep it there, the temp drops about to normal

Max Power said:

Unless it's only overheating at idle, I doubt it's the idle mixture circuit. Did you retard the timing when you set it?

Click to expand...

 

6

65racecoupe

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#8

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How hot does it get?

I am in Phoenix as well. I have to mess around with my cooling system.

Last night was the only time my ride didn't go over 200 degrees, but only because it was cool after the rain.

I don't drive my car in the heat of the day at all.

 

65notch

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#9

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220 was the highest. when i saw it i did the rev in neutral thing and it brought it down rapidly.
i just adjusted the carb like it says to on edelbrocks site, and i still have the same prob.

65racecoupe said:

How hot does it get?

I am in Phoenix as well. I have to mess around with my cooling system.

Last night was the only time my ride didn't go over 200 degrees, but only because it was cool after the rain.

I don't drive my car in the heat of the day at all.

Click to expand...

 

1

1965-Mustang

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#10

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• #10

I think I am having the same problem. I had it in the shop for a while and when I took it home I noticed it was overheating when I was just idling. I have since done just about everything to try and fix it new aluminum radiator, new water pump, new 6 blade fan, shroud. I have not done the timing but I do own a light. I have also messed with some carb stuff and do not really know much about it. I'll make a new thread on the radiator install.
Do not mean to hijack either.

 

65notch

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#11

• Jul 24, 2005

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1965-Mustang said:

Do not mean to hijack either.

Click to expand...

no prob man, let me know if you fix the prob.

 

65notch

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#12

• Jul 24, 2005

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what are symptoms that a waterpump is going out?

 

65up2d8

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Jul 24, 2005

#13

• Jul 24, 2005

• #13

Usually a squealing bearing and/or, of course, leaks.

 

G

grego37

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Jul 25, 2005

#14

• Jul 25, 2005

• #14

If it ran ok before you tried to adjust the carb.
Then ran hot after you changed the air/fuel mixture, I would say you adjusted it too lean.
(most perf. cars will run a little rough when cold)

When adjusting air/fuel mixture , the car should be at normal operating temp.
Get it hot, then adjust by ear until the highest rpm is achieved then re-adjust main idle if needed.
or
Get it hot, and adjust until the you get the highest vacuum reading .

If you have to change the timing, do that first then the carb.
Timing first
then Carb.
(I know nothing about edelbrock carbs., but same general rules should apply as Holley?)