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Overheating issue - highway only! #993579
05/16/11 12:37 PM
05/16/11 12:37 PM
Joined: May 2003
Posts: 1,603
germany
440sat72 Offline OP
top fuel
440sat72  Offline OP
top fuel

Joined: May 2003
Posts: 1,603
germany
Hello,

i noticed a coolant problem on my 72 Satellite: whenever i take the car to the autobahn and put some miles on it with steady 80 mph, temperature rises above the normal level (not extremely, though). when i take the exit an the RPMS go down, the coolant seems to boil over and splashes rom the radiator cap all over the engine bay.

Around town there is no problem at all.

What am i looking at? Clogged radiator? Insufficient pump?

Any help is appreciated!

Re: Overheating issue - highway only! [Re: 440sat72] #993580
05/16/11 12:45 PM
05/16/11 12:45 PM
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1 Offline
Too Many Posts
Challenger 1  Offline
Too Many Posts

Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Tell us more about your cooling system. Need to know all the details.

Go back to completely stock and you will have no problems. My

Re: Overheating issue - highway only! [Re: Challenger 1] #993581
05/16/11 01:04 PM
05/16/11 01:04 PM
Joined: May 2003
Posts: 1,603
germany
440sat72 Offline OP
top fuel
440sat72  Offline OP
top fuel

Joined: May 2003
Posts: 1,603
germany
It is pretty much stock. Stock radiator, thermostat, water pump.

Engine ist s lightlöy hooped up 440 with e-heads but nothing fancy ...

Re: Overheating issue - highway only! [Re: 440sat72] #993582
05/16/11 01:10 PM
05/16/11 01:10 PM
Joined: Jul 2008
Posts: 30,424
Florida STAYcation
dOc ! Offline
The village idiot's idiot
dOc !  Offline
The village idiot's idiot

Joined: Jul 2008
Posts: 30,424
Florida STAYcation
How about the water temp at other speeds?

Re: Overheating issue - highway only! [Re: 440sat72] #993583
05/16/11 01:16 PM
05/16/11 01:16 PM
Joined: Oct 2007
Posts: 4,319
St. Louis, Mo
3
318 Stroker Offline
master
318 Stroker  Offline
master
3

Joined: Oct 2007
Posts: 4,319
St. Louis, Mo
I had the exact same problem with my Challenger. On the advise of a Mopar buddy, I installed a spring in my lower radiator hose. It was collapsing at highway speeds, and running hot.

I went to the auto parts store and bought a universal flex hose with a spring inside. Cost me 10.00. I pulled the spring from it and installed it in my hose. Problem solved....

Re: Overheating issue - highway only! [Re: 318 Stroker] #993584
05/16/11 02:20 PM
05/16/11 02:20 PM
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
70Cuda383 Offline
Too Many Posts
70Cuda383  Offline
Too Many Posts

Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
overheating at speeds indicates a water flow problem typically, because you have MORE than enough air flowing through the radiator at speed.

common problem is the old soft rubber of the hose
"sucking shut" and stopping flow through the system, which is why so many have springs inside of them. the wire coil is wrapped around to prevent the rubber from pinching closed under negative pressure.

if you don't have one laying around, an old coat hangar can be cut and molded into shape and slid inside the hose to serve the same purpose, and it's free


**Photobucket sucks**
Re: Overheating issue - highway only! [Re: 70Cuda383] #993585
05/16/11 04:55 PM
05/16/11 04:55 PM
Joined: Feb 2003
Posts: 8,669
A
Andrewh Offline
master
Andrewh  Offline
master
A

Joined: Feb 2003
Posts: 8,669
if this has been happening a while, I guess the hose thing is something to check.

if it is new, and you have a thermal clutch replace it and the wp.

check it and see, my bet is it is failing.

I noticed the same symptoms once in a 383. getting hot at highway speeds but not around town.

Re: Overheating issue - highway only! [Re: 70Cuda383] #993586
05/16/11 05:01 PM
05/16/11 05:01 PM
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1 Offline
Too Many Posts
Challenger 1  Offline
Too Many Posts

Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Quote:

overheating at speeds indicates a water flow problem typically, because you have MORE than enough air flowing through the radiator at speed.

common problem is the old soft rubber of the hose
"sucking shut" and stopping flow through the system, which is why so many have springs inside of them. the wire coil is wrapped around to prevent the rubber from pinching closed under negative pressure.

if you don't have one laying around, an old coat hangar can be cut and molded into shape and slid inside the hose to serve the same purpose, and it's free




Good advise. Rev the engine and see if the hose is trying to suck closed. If there is no spring in there, you should put one in there. Like what was said, a piece of wire wrapped around a broomstick handle will work just fine.

Re: Overheating issue - highway only! [Re: Andrewh] #993587
05/16/11 05:02 PM
05/16/11 05:02 PM
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
R
RapidRobert Offline
Circle Track
RapidRobert  Offline
Circle Track
R

Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
Make sure (as said) the hose ain't sucking partly shut and the stat is opening all the way (not likely) but check, but the prob is a partly/somewhat clogged rad, not enough (water) flow thru it


live every 24 hour block of time like it's your last day on earth
Re: Overheating issue - highway only! [Re: RapidRobert] #993588
05/18/11 07:28 AM
05/18/11 07:28 AM
Joined: May 2003
Posts: 1,603
germany
440sat72 Offline OP
top fuel
440sat72  Offline OP
top fuel

Joined: May 2003
Posts: 1,603
germany
I'll try the hose trick and will let you know!

Thanks!







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