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Old 07-19-2002, 01:32 PM
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Post Engine running really hot!!

My engine which has just been installed seems to run a little to hot for my likeing. It takes about 2-3mins then it starts to get really hot and I mean really hot. The car has no front end and just about 8 feet away I can feel the heat. Is this normal? Also how come my engine smokes. Its smoke only at the rear exhaust mainfolds on both side. not at the front or in the middle. Why is this?? Hope you experts can help a new hotrodder fix these few pain in the but problems.

Zee

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Old 07-19-2002, 01:38 PM
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What is your temp guage on?
The smoke is probably a oil leak from the valve covers.
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Old 07-19-2002, 01:43 PM
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Zee, 78Monte is probably right about the oil leak try tightening the valve covers down a little bit more, also is this motor new, rebuilt, what was done to it?

[ July 19, 2002: Message edited by: Stevestang1966 ]</p>
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Old 07-19-2002, 01:55 PM
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I dont have a temp gauge to start off, I also have sealer on the covers cause they leaked before now they dont. Its a brand new rebuilt 350 chevy with a 4bbl.
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Old 07-19-2002, 09:11 PM
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check for the simple things first.
The thermistate (if that is bad it is not properly cooling or antifreeze is not moving at all!!!!)

The water pump is accually moving water (sounds silly but i spent a lot of money before i figured out that one)

Proper cooling mixture

big enough ratiator? (if your engine is beefed up that means it will probably run hotter)

and big enough fan (usually not the problem but it helps i guess if you have an electric fan)

and color of the engine (means nothing but i like saying that because there was a big discussion on that not to long ago in this room about color of engines)

try those first
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Old 07-21-2002, 06:59 PM
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my friend has the same problem with his 87 firebird, he put a 355 in it and his overheats only when he s driving and hes got a 3-core radiator, new water pump, 160 degree thermostat, electric fan, running it rich and retarded the timing, even now it still overheats under power, it gets better as he drives. Why? i dont know but he did buy some of the antifreeze conditioner that people use in their diesels and that helped out a little bit, you can get it at any NAPA or whatever.. hope you fix it keep me informed
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Old 07-22-2002, 05:02 AM
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Zeeman, you need a temp gauge for sure. Is it boiling over? Check this site 1BAD80 gave me when I had this problem. It gives you the basics of how a cooling system works, and related problems. Let us know, good luck. www.inccn.net/techform.htm
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Old 07-22-2002, 05:19 AM
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It's <a href="http://www.inccn.net/techforum.htm" target="_blank">www.inccn.net/techforum.htm</a>
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Old 11-22-2002, 12:37 PM
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Great article on cooling! Thanks for the link awsum34 and dollybud. Any recommendations on a high flow water pump for a firebird 400?
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Old 11-22-2002, 01:14 PM
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Flow Kooler part number BRA-1649 $80.00 at Summit. 30 % more flow the description notes. I use water wetter as well. That stuff works very well. I've seen alot of products that claim to lower the temp but I've used water wetter for a long time and have had only good exp. I get the stuff at the Ford garage. If your having a cooling problem I would buy an aluminum rad. Not only do they look cool and drop temps they take weight oof the nose of the car. Ryan
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Old 11-22-2002, 01:21 PM
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Another possibilty for smoke is paint, did you paint your motor? When I put the 350 in my S-10 I detailed the engine prior to dropping the engine back in, the paint made smoke for the first few days.

Bonuts
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Old 11-22-2002, 01:37 PM
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Thanks racer56! I just ordered the Flow Cooler water pump from Summit (I actually needed the BRA-1622 for my 1967 pontiac 400). Tonight I'm going to get the antifreeze % down to 25% instead of 50% (since I live in San Diego where it never freezes) and I'll try to get some of that water wetter stuff. I'll report in after phase 1 which is the 25% antifreeze. Thanks again everyone for the input.

[ November 22, 2002: Message edited by: jobu ]</p>
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Old 11-22-2002, 02:29 PM
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jobu...My firebird ran hot sitting still but did fine if I was moving. I did it all on my 67 firebird 400. Alum Rad, High Flo water pump, at least 5 fan combinations, timing, new distributor, every thermostat I could find, no thermostat. Pontiacs run hotter than others due to head design and that's a big motor in a small place. If you have headers that adds to the problem by letting heat build up under the hood. What really made the difference is a really good electric fan. Not one of those AutoZone fans, I tried that too.
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Old 11-23-2002, 10:13 AM
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Make sure your water pump is the right rotation, i bought a new rebuilt engine and they put a water pump for v-belt pulleys and i used a serpentine set up and it ran the water pump backwards. <img src="graemlins/spank.gif" border="0" alt="[spank]" />
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Old 11-23-2002, 05:53 PM
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My motor upon starting was running really hot. My new edelbrock was set really lean out of the box. I richened up the idle mixture and the motor cooled down. It was to the point that the headers were starting to turn red. Also, my timing was not advanced enough when I first started the motor. Once the carb was adjusted and timing advanced, the motor ran much cooler and all the excess heat was gone. I'm by far no expert, but that's what I'd check first.
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