still over heating
#1462668
07/04/13 01:25 AM
07/04/13 01:25 AM
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Joined: Nov 2011
Posts: 256 libby mt
lifted85
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enthusiast
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OP
enthusiast
Joined: Nov 2011
Posts: 256
libby mt
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ok I swapped in a new t stat, changed the water pump to a known good 1, flushed the radiator with some flush stuff I had. put it back together an still over heating 250 deg!! maybe radiator cap?? still could be the radiator not throwing that idea out... motor is a 77 318
drive fast, drive hard, DRIVE MOPAR
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Re: still over heating
[Re: Remow2112]
#1462670
07/04/13 03:39 AM
07/04/13 03:39 AM
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Joined: Nov 2011
Posts: 256 libby mt
lifted85
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enthusiast
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libby mt
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ok, ya well it had a flex fan on it removed that, put a clutch fan on it, I fired it up in the yard an probably after about 5-10min's idling she was 250 deg ish, IIRC the pump is a non ac pump, radiator is a factory mopar radiator it's a 2-3 core, I ran some of that radiator flush stuff in it thinking maybe hey that might fix it, then I ran the hose through the radiator for a few hour's an throught the motor thinking maybe something is blocked but still the same I will try your idea's an update thanks
drive fast, drive hard, DRIVE MOPAR
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Re: still over heating
[Re: Mr.Yuck]
#1462675
07/04/13 11:05 AM
07/04/13 11:05 AM
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Joined: Jan 2003
Posts: 21,079 Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,079
Niles , Ohio
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Let it warm up.Then shut off and feel the rad at top and bottom.It should be pretty close to the same temp.Try pulling the plugs that screw into the block.Use a 6 point 9/16s to remove them.Most wont even drain because of crud in the block.You have to use a screwdriver to open them.Flush it with the plugs out.SBs I fill the block thru the stat opening and then install the stat.Rocky
Chrysler Firepower
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Re: still over heating
[Re: therocks]
#1462676
07/04/13 12:01 PM
07/04/13 12:01 PM
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Joined: Jan 2006
Posts: 166 MINNESOTA
BRONZEBEE
member
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member
Joined: Jan 2006
Posts: 166
MINNESOTA
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Checking with a infrared temp gun is good advise!!Is it blowing coolant out the overflow?If not probably not overheating. I went through this for two years on and off factory gauge off 30 degrees,cheapo 3 pod aftermarket gauge off 25 degrees with two gauges telling me i'm overheating i thought i was. Gauges read 230 and 240 and infrared reads 185 at the thermostat housing. Installed autometer mechanical gauge it reads 195 max in traffic and just changed the gauge because i changed ever thing else twice!!
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Re: still over heating
[Re: lifted85]
#1462678
07/04/13 01:13 PM
07/04/13 01:13 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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Can you pull up the original thread on this for more background info. As said I would confirm the actual temp with a known good gauge or infrared gun what ever it takes. Assuming the initial ain't severely retarded which I doubt it is & with a new stat/pump I'm thinking there's plenty of water flow UNLESS the rad is severely plugged & I doubt the lower hose is sucking shut at idle. sounds more like an airflow problem but you've addressed the fan but might put a shop fan in front just for a check to see if it is an airflow issue & can you feel the air being pulled thru on the front side of the rad?. I would take off the water pump fan belt & the stat housing & the stat & with the coolant at the brim, start the eng from cold & gun it repeatedly for a minute or two max & see if there's bubbles or if the coolant starts to rise which it should not rise in that length of time starting from cold since the water pump is totally diasabled there should be a dead calm with no turbulence unless there's a combustion leak. Keep us posted. #1 confirm the actual temp. EDIT hitting 250 in 5 or 10 minutes tells me there's a severe issue going on
Last edited by RapidRobert; 07/04/13 01:22 PM.
live every 24 hour block of time like it's your last day on earth
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Re: still over heating
[Re: RapidRobert]
#1462679
07/04/13 06:35 PM
07/04/13 06:35 PM
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Joined: Nov 2011
Posts: 256 libby mt
lifted85
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yep fan shroud, installed a new 195 tstat, removed the flex fan it had an installed a clutch fan. today I fired it up, let it run for10-15 min's, felt the radiator an the hoses & they were cold, except the 2 hoses running to the water pump from the intake they were hot.. an yes I did bypass the heater core thinking maybe it was plugged but no change.water was boiling out kind ofby the intake not sure if there was water that was sitting up there or what. but what's temp she should be at 200-210??
drive fast, drive hard, DRIVE MOPAR
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Re: still over heating
[Re: lifted85]
#1462685
07/05/13 08:12 AM
07/05/13 08:12 AM
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Joined: Dec 2007
Posts: 18,157 Mass
DAYCLONA
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 18,157
Mass
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It's often hard to diagnose symptoms via the internet, but here's 2 questions/suggestions, won't cost you anything but time...
are you using a cast iron water pump?..if so turn the thermostat upside down in the waterneck, flow is reverse...
another suggestion, start the vehicle, put the radiator cap on, but turn it back to the point that it's just engaging the tangs where you have to push it down to release, but still engaged, but loose, run the engine, if it doesn't overheat,...I'd start looking at head gaskets...
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Re: still over heating
[Re: DAYCLONA]
#1462686
07/05/13 09:35 AM
07/05/13 09:35 AM
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Joined: Oct 2003
Posts: 21,345 Marysville, O-H-I-O
70Cuda383
Too Many Posts
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Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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So... Gauge read 250 but rubber hoses were cold?
At 250 it should be painful to touch the hoses.
Pull the radiator out of the car. Use a garden hose at full blast, and see if the radiator can flow enough to not back up. If the radiator can flow the 5 gallons per minute that a garden hose can put out, then you have enough flow to heat up the upper radiator hose.
So if your upper hose is not hot when the gauge reads 250, and the radiator is not plugged, then you either have a faulty gauge issue or a thermostat that's not opening.
You can test water pump flow by disconnecting the upper hose at the radiator and removing the thermostat. Water should flow out of the upper hose.
**Photobucket sucks**
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