302 Overheating! - Ford Muscle Forums : Ford Muscle Cars Tech Forum
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post #1 of 21 (permalink) Old 06-19-2002, 04:19 PM Thread Starter
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302 Overheating!

I just put a different motor in my stang, with a new 160 deg. thermostst, newer stock water pump, new perma-cool 16" electric fan, and the stock radiator. I didn't think it would overheat, but whenever I run it for about 30 mins, the temp gauge will get past 210. And this is in 50 degree weather. I know the thermostat is opening, and the fan is on all the time. Plus, it does this in traffic and cruising on the freeway (about 2400 RPM). It also has the A/C ratio water pump and crank pulleys. It's not leaking any coolant. So why is it overheating?!?!? Aaargh. Anything would really help. Thanks.
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post #2 of 21 (permalink) Old 06-19-2002, 04:20 PM Thread Starter
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302 Overheating!

Oh yeah, and the head gaskets are on right. I double checked before I put them on.
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post #3 of 21 (permalink) Old 06-19-2002, 04:37 PM
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302 Overheating!

I'd put the stock fan back on and try it.
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post #4 of 21 (permalink) Old 06-19-2002, 05:50 PM
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302 Overheating!

Is the fan put on correctly? Check to see if it's pushing or pulling air.

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post #5 of 21 (permalink) Old 06-19-2002, 06:15 PM
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302 Overheating!

I agree with the other guy. Try putting your water pump fan and take off the electric. I put an electric fan on my 302 stang a while ago. It was one from pep boys.. it only pushed around 1600cfms. This actually made my engine run warmer. The blades were very close together, so even while driving on the freeway, not enough air would find its way through the fan blades...
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post #6 of 21 (permalink) Old 06-19-2002, 06:29 PM
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302 Overheating!

Are you sure you have the correct water pump, ie not reverse rotation?
Lift off the radiator cap and start the engine. Let it warm up until the thermostat opens. You should then see coolant flowing through the top of the radiator.
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post #7 of 21 (permalink) Old 06-19-2002, 07:19 PM Thread Starter
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302 Overheating!

The fan's pulling air. It may be that it's just too weak, but it feels like it pulls more air at idle than the mechanical fan did. I'll check the water pump. Do you think that it could be caused by something in the radiator?
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post #8 of 21 (permalink) Old 06-19-2002, 08:30 PM
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302 Overheating!

how bout the 160 isnt enough and its staying open all the time and the water is circulating to fast and doesnt have time to cool in the radiator.Try a 180.You dont need a fan going 30mph and up
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post #9 of 21 (permalink) Old 06-19-2002, 08:33 PM
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302 Overheating!

Question 1: What engine was in the car originally and what year model Mustang are we talking about??

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post #10 of 21 (permalink) Old 06-19-2002, 10:15 PM Thread Starter
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302 Overheating!

Actually, It overheated with the new 180 thermostat, and I put in the 160 yesterday...no difference.

The car is a '67 mustang, originally 289 4v/three speed car, now with a 302 with ported stock heads, stock cam, performer intake, holley 600, long tube headers, etc.
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post #11 of 21 (permalink) Old 06-20-2002, 07:59 AM
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302 Overheating!

I'm going to attempt to keep this short and sweet since I went around the block about 5 times with the same problem.

Start at the radiator! See if it is a 2 row or 3 row unit and look inside and see if it is clogged up. When is the last time it was cleaned?

If it is a 2 row, junk it, and find a 390 radiator for your car - but whatever you do, don't forget to run a fan shroud!
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post #12 of 21 (permalink) Old 06-20-2002, 08:03 AM
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302 Overheating!

P.S., As an after thought, you said you have a "new" 16 inch electric fan. Ditch it and go back to the mechanical fan with a shroud<U></U>. (I've been down that road too)
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post #13 of 21 (permalink) Old 06-20-2002, 08:26 AM
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302 Overheating!

The old myth about moving the water too quickly thru the system to pull heat is incorrect. Stewart Components has some good info on this on their website.

I'd say it's a combination of the radiator and the fan. Most stock sbf radiators are pretty wimpy. And the parts-store elec fans don't pull nearly enough air for commuter type use. Check out the fan my local speed shop is selling. http://www.ramchargers.com . It's a production vehicle fan from Valeo (don't know how they got 'em). I run one of these in my daily driver behind a Pep Boys 3-core rad. Works GREAT!
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post #14 of 21 (permalink) Old 06-20-2002, 04:13 PM
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302 Overheating!

If the radiator is a two row from a parts store....that is why....VERY WIMPY!
It is too small for you motor. I had the same problem when i was tight on money and went from my 3+ row radiator to a stock 2 row from autozone. Nevertheless...I had to go back to my 279.99 radiator from NPD.
Hope this helps

1970 Mustang Coupe. 302, Paxton Supercharger, Edelbrock Performer RPM heads (1.90i 1.60e), Barry Grant Mighty Demon carb, Performer RPM intake, MSD Pro Billet Distributor (w/ blaster 2 coil and 6A box), 8.8 inch - 3.73 gears, AOD tranny, X-pipe
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post #15 of 21 (permalink) Old 06-20-2002, 06:47 PM
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302 Overheating!

WHAT IS YOUR TIMING AND IS YOUR CARB ADJUSTED RIGHT
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