Re: Help... 383 running hot
[Re: derekeh]
#728395
06/19/10 07:08 PM
06/19/10 07:08 PM
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Joined: Nov 2004
Posts: 843
Suffolk,VA
ireland383
super stock
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super stock
Joined: Nov 2004
Posts: 843
Suffolk,VA
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Definately need the shroud and you should be running a 16 lbs. cap. The obvious, make sure you have all of the air out of the system. Also are you using a clutch fan?
Last edited by ireland383; 06/19/10 07:08 PM.
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Re: Help... 383 running hot
[Re: derekeh]
#728402
06/20/10 01:54 AM
06/20/10 01:54 AM
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Joined: Jul 2008
Posts: 259
Khemi, Stygia
Mebsuta
enthusiast
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enthusiast
Joined: Jul 2008
Posts: 259
Khemi, Stygia
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Mine started heating up and wouldn't go back down when moving. Bypassed heater core and that took care of it.
68 Roadrunner. 383 4-spd. Beat up.
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Re: Help... 383 running hot
[Re: RapidRobert]
#728404
06/20/10 01:30 PM
06/20/10 01:30 PM
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Joined: Feb 2003
Posts: 10,227
Someplace you aren't
SomeCarGuy
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 10,227
Someplace you aren't
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I think everybody pretty well covered the bases on this one.
I will take an educated guess that if all checks out on the listed items, that Robert has it with casting sand plugging the radiator.
I want my fair share
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Re: Help... 383 running hot
[Re: RapidRobert]
#728405
06/20/10 03:06 PM
06/20/10 03:06 PM
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Joined: Apr 2010
Posts: 1,216
Under My Car
Mopar_Country
pro stock
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pro stock
Joined: Apr 2010
Posts: 1,216
Under My Car
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Quote:
Quote:
Yesterday I took it on a drive doing 75 mph and it over about half an hour it went from 180 to 210. When I slowed the car down to around 55 it dropped to 200. But any ideas what else could be the problem here?
Radiator partly plugged
I had similar problems with my 95 truck and replaced the rad, problem solved.
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Re: Help... 383 running hot
[Re: derekeh]
#728406
06/20/10 03:59 PM
06/20/10 03:59 PM
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Joined: Nov 2009
Posts: 2,275
Desert Tracker
HYPER8oSoNic
top fuel
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top fuel
Joined: Nov 2009
Posts: 2,275
Desert Tracker
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Quote:
The 383 I have never has cooled the best but im not running a fan shroud and really need a bigger radiator. For the past few years it would always run around 180-190 until I was in traffic.. then it would slowly creep up to 200 or slightly above.. but cool right back down when I would start moving. Well a few weeks ago I noticed my gauge showed around 210 degrees and when the car started moving it wouldnt cool back down. So I replaced thermostat because it was stuck open. Now the car heats up to around 180... cools back down... then goes back to 180 again. It will then slowly keep getting hotter until about 210. Yesterday I took it on a drive doing 75 mph and it over about half an hour it went from 180 to 210. When I slowed the car down to around 55 it dropped to 200. Brought it home and it had plenty of coolant/water in it. But the hoses were swollen bad and I couldnt squeeze them a bit. I was thinking my radiator cap may be bad but its very easy to push it in as its just a 7 lb one. Im going to replace the cap and hoses today. But any ideas what else could be the problem here?
Check the radiator core (grille side) for bugs, road grime, grit/grime etc. If a/c car, check condenser. Flush system WELL. Keep the 16 psi cap,
but have system checked for leaks with new cap!!
Replace hoses, they may be in a weaked states due to ballooning. By all means, get a shroud and a
viscuous fan clutch (MP Performance), it will help
tremendously. And check your timing
and timing slack at the distributor. It may be
out of time (overadvanced/retarded) with the cam used, IF cam is NOT factory type!! A leaned out
carb (top end/slightly low fuel pressure/level) may
be of problem too. 
Last edited by HYPER8oSoNic; 06/20/10 11:21 PM.
"Stupidity is Ignorance on Steroids"
"Yeah, it's hopped to over 160" (quote by Kowalski in the movie Vanishing Point 1970 - Cupid Productions)
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