326 running temp and fan alternator belt - Pontiac GTO Forum
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post #1 of 4 (permalink) Old 03-19-2016, 05:52 PM Thread Starter
CPL
 
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326 running temp and fan alternator belt

Afternoon.Iput a temp gauge in,my 326 its running at 230 ta 235 degrees,dose anyone know if that's normal?have about 350 miles on the rebuilt 326.also my fan alt. belt is turning upside down,could it be it's not tight enough?
Thanks
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post #2 of 4 (permalink) Old 03-20-2016, 10:36 AM
 
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Hard to say on the temp reading. Do you know the temp gauge is correct? Seems many here say that the sending unit on the block has to be "correct" to get a proper reading at your gauge and that some aftermarket sending units are off and will show a higher temp on your gauge. It has been suggested that you purchase a hand help laser temp gauge that you point and shoot at the radiator, engine, etc. to take a more accurate reading. It can also locate any "hot spots" that you would not normally be able to detect yourself. You can buy these at most auto parts stores and they are inexpensive.

Do a forum search and you will get many ideas as this question is a regular that comes up enough. 230-235 in my opinion is too high, but a new engine will also run a little bit hotter until it loosens up. Incorrect timing can also affect engine temp. If it is retarded too much, the engine will run hotter.

So there are a number of things that will cause your engine to run hot TO INCLUDE the fan belt slipping and/or flipping over. So, get this issue resolved first.

Are your pulleys in alignment? This is the first thing that will cause a belt to flip. Do you have the correct mounting brackets for your accessories and know that someone did not swap any of these or install the incorrect year brackets so as to not allow you to tighten enough on the belts or they are incorrectly positioned on your pulleys? Is the belt the correct & matching width? Some time the auto parts stores will give you a metric belt which their book says will fit. It is not the same and may sit too deep in the pulley groove and ride on the inside & slip because it is not riding high enough up in the pulley groove to "catch/turn" the pulley. Use to flip mine at high RPM's until I went with a Dayco V-belt. It has the top cog design like this - Dayco Top Cog V-Belts 15420 - Free Shipping on Orders Over $99 at Summit Racing You should be able to get this brand at your local parts store.
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post #3 of 4 (permalink) Old 03-20-2016, 11:23 AM Thread Starter
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Thanks looks like it was the wrong belt,got it at Autozone went to orielly got the correct one.you could see major difference in the belts.temp dropped 20 degrees. I'm sure it will drop more once it's good and broke in.
Thanks
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post #4 of 4 (permalink) Old 03-20-2016, 03:19 PM
 
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Originally Posted by CPL View Post
Thanks looks like it was the wrong belt,got it at Autozone went to orielly got the correct one.you could see major difference in the belts.temp dropped 20 degrees. I'm sure it will drop more once it's good and broke in.
Thanks

Excellent, simple fix then and a worry off your shoulders.

These IDIOTS at our local parts stores haven't a clue anymore of what is what. If it is not in "their" computer system, you can't get it. If it is in "their" computer system, then you gotta hope the dumbed down IDIOT behind the screen is capable of reading the screen and then correctly pulling the right part he/she hands off to you. Been there and Done that too many times.
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  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, Lemans & GTO General Discussion

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