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Author Topic:   Running Hot / Engine Additives
DEEDDUDE
Dirt Maniac

Total posts: 111
posted October 16, 2001 09:34 PM
Need some help? Engine still running hot. New radiator, 1: 1 Pulleys, four blade 17” fan, shroud, new hoses, new Stewart pump. After I installed the Stewart pump the engine actually started running hotter. Plugs look good, I’ve ran the timing between 35 and 37 still no change. I’ve run with a restrictor and w/o, w and w/o thermostat. Not losing any water. Don’t know what could be the problem. Would running an additive like “Prolong” or other brand help? The only thing left to do is burn up the motor. Frustrated. Any help is appreciated. Deed

jammin
Dirt Administrator

Total posts: 5556
posted October 16, 2001 10:24 PM UIN: 16262997
Sounds like the restrictor your using was allowing too much water to run thru the radiator and not keeping enough pressure in the block. When you put the Stewart on, it ran hotter because it was pumping the water through faster. If the water goes through the radiator, it has to have time to transfer heat, if it doesnt do this, it will run hot. Another thing that I would do is upgrade to a rigid 6 blade fan. The pitch on a good 6 blade fan will pull more air through it and will allow it to transfer heat faster than with less air. This is what it sounds like to me...been through all of this before.
My 1 cent.

jammin

Oldsmobile13
Dirt Maniac

Total posts: 108
posted October 17, 2001 12:55 PM
How much is your block bored and what bearing clearance do you use? Ive had problems overheating with these things being wrong.

bbracer17
Dirt Freak

Total posts: 256
posted October 17, 2001 09:02 PM
How hot is the engine running?

DEEDDUDE
Dirt Maniac

Total posts: 111
posted October 18, 2001 05:22 AM
Thanks for the help guys. The engine has ran as high as 250 after feature, if i'm lucky to finish due to over heating. Jammin, I've tried different restrictors w/ no luck. I pressure checked the block at 6000 rpm and had 25 psi, w/3/4 restrictor. It has to be something simple I,ve tried just about every combo to fix this problem. 13 block is .030 over. not sure about other measurements. Thanks for the help. Deed

wildcat4257
Dirt Maniac

Total posts: 108
posted October 18, 2001 05:33 AM
try a product called WATER WETTER. you can find it from several mail order places. if you use it do not mix it with anti-freeze, water only. anti-freeze keeps it from cooling as well. you can get it from TOM CLISE out of MD. # is 1-800-296-3760. runs about 6 bucks.

[This message has been edited by wildcat4257 (edited October 18, 2001).]

jammin
Dirt Administrator

Total posts: 5556
posted October 18, 2001 08:12 AM UIN: 16262997
Get away from the 4 blade and see if that is you problem.


jammin

DEEDDUDE
Dirt Maniac

Total posts: 111
posted October 18, 2001 06:03 PM
Thanks for the help Jammin, I've had 6 blade on it before with old pump. I was told the 4 blade had more pitch and pulled more air, I'll try the 6 blade again. Could there be something wrong with the head gaskets? I run the shim gaskets for increased comp; about 11:1. Thanks again for the help. Deed

Also tried water wetter and purple ice not much of a help.

WILDphil
Dirt Full Roller

Total posts: 32
posted October 18, 2001 08:41 PM
I would have to say that if you have tried everthing else that was mentioned before.
Then the last to do is tear down the motor take the heads off and inspect the heads, the block and the head gasket, I would almost bet that your problem will be found here. Have the heads magnafluxed for cracks and if you can have the block checked also, Is your oil a milky white color ? If it is this means that there is an obvious problem with the cooling system. Now also your oil could still be just fine and have the problems your this probably indicates that your head ,block or head gasket could be cracked. Also check your freeze out plugs make sure that they are not leaking, and check the outside of the block around the head gasket area for anything leaking around there. Hope this helps somewhat.

mod257
Dirt Newbie

Total posts: 0
posted October 18, 2001 11:01 PM
Are you sure your gage is working properly?

Flatlander
Dirt Freak

Total posts: 310
posted October 19, 2001 12:40 PM
what do your headers look like you might be sucking air somewhere Crank yor engine and get a spray bottle and spray along your intake and carb any where you might be gettig air I had a small laek on my intake that acted like this

bbracer17
Dirt Freak

Total posts: 256
posted October 19, 2001 10:19 PM
What kind of engine are you running? I helped a guy that had a long time overheating problem and all he had wrong was a Oldsmobile fan on a chevy, of course the olds engine turns the oposite of a chevy. Just make sure your fan is sucking through the radiator instead of blowing forward.

phelps
Dirt Full Roller

Total posts: 58
posted October 19, 2001 10:42 PM
Olds turns opposite? You might want to research that a little more bbracer17.

bbracer17
Dirt Freak

Total posts: 256
posted October 20, 2001 03:49 PM
The distributor on the Olds 350 turns counter clockwise doesn't it? All my Chevys turn clockwise. I am assuming that the crank rotates the other direction. Maybe I'm wrong about that but either way there is a fan that is for reverse rotation and it is sold at auto parts stores, I thought it was for an Olds. Just be sure that one is not installed.

DEEDDUDE
Dirt Maniac

Total posts: 111
posted October 20, 2001 05:58 PM
Thanks for all the help guys. looked system over again and again. put on new shroud and the old 6 blade back on. I did wait in line at O'reilly's and bought some prolong. Car ran for about 30 minutes and never got over 205. gave it a couple short blast and the temp. droped about 5 deg., thats sitting in the shop. will do much better on the track. Thanks again. I would let you know how it all worked out, BUT I just started having brake problems. Thats a new post isn't it. Thanks again. Deed

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