Overheating - Team Camaro Tech
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post #1 of 16 (permalink) Old May 28th, 19, 07:28 AM Thread Starter
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Aziz1969
 
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Overheating

Hi,

I have a 69 Camaro with M-IV 427, .030 over, edelbrock aluminum heads (#60499). It has new Becool aluminum radiator (#10168), stewart CCW water pump (#11105), March serpentine pulley set (#20517) with AC, 160 degree stat with 3 bypass holes (#emp-300). It has MKVIII fan; first speed turn on 140 degree and second speed turns on 185 degree. Radiator has Summit racing coolant (#sum-943000) with a bottle of wet wetter.

Have not turn the AC on yet. temperature scroll up to 230 when idling for 10 minutes then I shut the engine off. outside temperature is 100 degree.

NEED HELP
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post #2 of 16 (permalink) Old May 28th, 19, 07:50 AM
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kevin
 
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Re: Overheating

did this just start?
new engine/old engine
checked the plugs for a blown head gasket?
fan wired right way?
have a shroud?
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post #3 of 16 (permalink) Old May 28th, 19, 08:37 AM
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Re: Overheating

be sure shroud is covering as much of the radiator core as possible and directing all the air the fan is moving through the core. not enough ignition timing advance can cause hot condition as well .this may not be an issue limited to your cooling system.
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post #4 of 16 (permalink) Old May 28th, 19, 10:09 AM Thread Starter
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Aziz1969
 
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Re: Overheating

It is new engine and the fan shroud is custom and it is covering 98% of the radiator core. fan working very good.
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post #5 of 16 (permalink) Old May 28th, 19, 10:56 AM
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Re: Overheating

you sure the fans are not running backwards..
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post #6 of 16 (permalink) Old May 28th, 19, 03:36 PM Thread Starter
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Aziz1969
 
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Re: Overheating

Fan is running in the right direction
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post #7 of 16 (permalink) Old May 28th, 19, 03:42 PM
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Re: Overheating

What's the initial timing set at ?

Vacuum advance hooked up to manifold or ported vacuum ?

What type of cam and how much vacuum do you have at idle ?

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post #8 of 16 (permalink) Old May 29th, 19, 05:27 AM
Eric
 
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Re: Overheating

Air pocket in the radiator?

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post #9 of 16 (permalink) Old May 30th, 19, 09:55 AM Thread Starter
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Re: Overheating

Timing is 8 initial and 32 total.
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post #10 of 16 (permalink) Old May 30th, 19, 09:56 AM Thread Starter
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Aziz1969
 
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Re: Overheating

It is a G-Straub custom HFT cam.

vacuum advance hooked to the ported vacuum
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post #11 of 16 (permalink) Old May 30th, 19, 10:00 AM
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Darin
 
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I’m not sure if it will fix your overheat issue, but you could do better with your timing curve using manifold vacuum.
Google or search here a bit on timing advance using manifold vac.

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post #12 of 16 (permalink) Old May 30th, 19, 10:09 AM
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Re: Overheating

230 in 10 minutes is likely one of the suggestions above. Even if you had no fans, the car should not get that hot in 10 minutes.

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post #13 of 16 (permalink) Old May 30th, 19, 10:42 AM
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Re: Overheating

Quote:
Originally Posted by Aziz2010 View Post
Timing is 8 initial and 32 total.
As a test, raise your initial to 14 or 16 and let it idle. If it solves the high temp at idle you need to work on a recurve or working with vacuum advance so you have more initial without adding to the total.

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post #14 of 16 (permalink) Old May 30th, 19, 11:17 AM Thread Starter
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I talked with the cam guy and he told me to set the initial at 18 and total 35??
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post #15 of 16 (permalink) Old May 30th, 19, 11:18 AM Thread Starter
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18-35 at 2600 rpm
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