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post #1 of 4 (permalink) Old 01-14-09, 11:08 AM Thread Starter
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1968 Cougar Overheating @ idle

I have a 68 cougar w/ 289 overheating at slow idle when sitting at lights and such. Has anyone had any issues NOT having the stock fan shroud installed and had overheating issues? everything else is OK.. T-stat is new. only two things I can think of is poor air flow (piece of paper sticks to outside radiator @ low idle) due to not having a fan shroud or plugged radiator. any suggestions? thanks alot..!

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post #2 of 4 (permalink) Old 01-14-09, 06:33 PM
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Re: 1968 Cougar Overheating @ idle

The tubes in the radiator are probably clogged.
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post #3 of 4 (permalink) Old 01-16-09, 08:53 PM
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Re: 1968 Cougar Overheating @ idle

as above check rad

maybe get a 5 blade fan for it.

I have a 68 Mustang with 289 and don't have any problem with over-heating
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post #4 of 4 (permalink) Old 02-14-09, 12:04 AM
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Re: 1968 Cougar Overheating @ idle

Without the fan shroud, the fan is not concentrating the air flow through the radiator. It is essentially just throwing the air all around the engine compartment. You need the shroud to help force the air through the radiator which is where you get the majority of your heat exchange in order to cool the engine properly. You don't have that problem when you are moving because nature is taking care of that for you. You may also want to flush the radiator just in case the tubes are clogged in there as mentioned above.
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