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Car's running hot... What should I change? #60321 05/20/08 02:41 PM 05/20/08 02:41 PM
Joined: Feb 2003 Posts: 265 Garland, Texas 1badmopar OP enthusiast
1badmopar OP enthusiast Joined: Feb 2003 Posts: 265 Garland, Texas	I constantly struggle to keep my engine cool. I have tried everything, but cannot seem to find the right combo. What should I try next? I am so frustrated that the money is not an object. Currently, I have a 19x31 aluminum radiator, dual 12" Permacool fans, Meizer 35 GPM water pump, and a 160 thermo. The car idles at 180-185, drives at 180, and then will heat to 200-220 sitting at stop light or in traffic. The motor is a "520 RB with Eddy heads and 10.5:1 comp. I am even running the low friction 1/16 3/16 rings. It is a big motor, but not radical. Do you think the block could be stopped up? 1966 Plymouth Belvedere 520" RB w/ Indy 440-1 Heads FiTech Fuel Injection TKO 600 conversion [img]https://flic.kr/p/2j1ejsK[/img]

Re: Car's running hot... What should I change? [Re: 1badmopar] #60322 05/20/08 02:43 PM 05/20/08 02:43 PM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	put a stock H20 pump and fan/shroud on and see if that helps.

Re: Car's running hot... What should I change? [Re: 1badmopar] #60323 05/20/08 03:01 PM 05/20/08 03:01 PM
Joined: Mar 2003 Posts: 4,848 Memphis HemiRick master
HemiRick master Joined: Mar 2003 Posts: 4,848 Memphis	The fact that it only heats up when cars not moving tells me it's lack of air flow.....Those electric fans just aren't cuttin it. Take care, Rick 68 Coronet R/T 440 & 68 Charger 528 Hemi,and 5 Challengers! 6 cyl, 318, 360, 383, 451

Re: Car's running hot... What should I change? [Re: Mr.Yuck] #60324 05/20/08 03:11 PM 05/20/08 03:11 PM
Joined: Oct 2003 Posts: 21,345 Marysville, O-H-I-O 70Cuda383 Too Many Posts
70Cuda383 Too Many Posts Joined: Oct 2003 Posts: 21,345 Marysville, O-H-I-O	the fans might not be big enough. on my big block, I had a 10" fan and a 14" fan on my radiator, together, they did not move enough air to keep me cool. I went with an OEM 19" fan that moves so much air, the plastic blades actually suck in towards the core about 1/4" and it pulls 30 amps or more at start up. maybe 10-15 once it's running that fan with a shroud, is enough to keep me cool now. Photobucket sucks

Re: Car's running hot... What should I change? [Re: HemiRick] #60325 05/20/08 05:00 PM 05/20/08 05:00 PM
Joined: Aug 2005 Posts: 989 WI, USA 6 67dodge67 mopar addict
67dodge67 mopar addict 6 Joined: Aug 2005 Posts: 989 WI, USA	Quote: The fact that it only heats up when cars not moving tells me it's lack of air flow.....Those electric fans just aren't cuttin it. I had a similar problem with my 470 not too long ago. The fan I had was not doing the job. I ended up swapping out the "flexi-lite" or whatever it was called for a bb mopar clutch-type fan set up. That thing draws a TON of cool air thru the radiator when sitting in park or traffic it's rediculous.

Re: Car's running hot... What should I change? [Re: 67dodge67] #60326 05/20/08 05:18 PM 05/20/08 05:18 PM
Joined: Oct 2005 Posts: 9,065 Milwaukee, WI In_The_Pink master
In_The_Pink master Joined: Oct 2005 Posts: 9,065 Milwaukee, WI	Make sure the shroud is properly matched to the fan size, too.

Re: Car's running hot... What should I change? [Re: 67dodge67] #60327 05/20/08 05:22 PM 05/20/08 05:22 PM
Joined: Jan 2005 Posts: 3,312 Marine Corps Base Hawaii DemonKyle USMC LCPL
DemonKyle USMC LCPL Joined: Jan 2005 Posts: 3,312 Marine Corps Base Hawaii	Possible the radiator cap may not be holding pressure??

Re: Car's running hot... What should I change? [Re: In_The_Pink] #60328 05/20/08 05:26 PM 05/20/08 05:26 PM
Joined: Jan 2003 Posts: 2,928 Canada R RobR master
RobR master R Joined: Jan 2003 Posts: 2,928 Canada	First I'd take the 160 stat out...it never closes so the water in the rad doesn't have a chance to cool...A 180 should get the job done.Then I'd move on to those two small fans if the stat doesn't help big time... Electric water pumps and electric fans are great for the track but with big engines in real traffic leave much to be desired

Re: Car's running hot... What should I change? [Re: 1badmopar] #60329 05/20/08 08:42 PM 05/20/08 08:42 PM
A Anonymous Unregistered
Anonymous Unregistered A	i had that same problem with my 440 until i put a 7 blade fan and a shroud on it runs cool now

Re: Car's running hot... What should I change? #60330 05/20/08 08:51 PM 05/20/08 08:51 PM
Joined: Jan 2006 Posts: 587 San Clemente, ca enelson mopar addict
enelson mopar addict Joined: Jan 2006 Posts: 587 San Clemente, ca	PM Eric on the board here, and order a HHR electric fan. Those babys flow bigtime air. I didn't have the room in my dart for it, but goody uses one on his cuda and has good luck cruisin around in 90+ degrees. Might try going to a 180 stat also, but I think you're not getting the airflow you need as mentioned above. GL

Re: Car's running hot... What should I change? #60331 05/20/08 08:57 PM 05/20/08 08:57 PM
Joined: Jan 2007 Posts: 7,664 IN A ahy master
ahy master A Joined: Jan 2007 Posts: 7,664 IN	Agree with all the posts. The MP high volume water pump and engine driven 5 blade thermal clutch fan with shroud does it for me. I have a 7 blade fan from a '78 Cordoba cleaned and painted for backup but haven't needed it. Also might want to check timing advance at idle - strokers with a decent cam like lots of advance. A more efficient idle means less heat. Mine likes 18 degrees.

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