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Old 09-15-2011, 10:28 PM
snookomatic snookomatic is offline
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Default Temperature Gauge, is this normal? Picture included

Hello, I just bought a 2005 RAM 1500 4x4 Quad Cab 4.7 Magnum one owner with 90,250 miles. Nice, seems to be a well taken care of truck.

Anyway the temp gauge rises to "one to two needle widths" or 1.5mm past center when I am going 65+mph, when I drop down to less than 45mph, all the way to an idle, it will be at the center point. Around town it seems to stay at the center point. If I am going 55mph and floor it it to pass the gauge will go to the "one to two needle widths" or 1.5mm past center point, once there, it stops and will not climb higher. I can floor it while it is at the "one to two needle widths" or 1.5mm past center point and it will not climb higher.

I live in SC, it is somewhat humid now and 85-90 degrees.

It only moves from dead center to the point shown in the picture or "one to two needle widths" or 1.5mm past center point. The picture was taken at 68mph. It is a small amount of movement but it seems to be more than I have ever seen in a vehicle before.

I have called several Dodge dealers and explained the above thoroughly and all of them say this is normal, one said they get asked this a lot.

Anyway, thanks for helping out the new guy.
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Old 09-15-2011, 11:55 PM
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My personal experience is that my 03 4.7 normally stay just below the halfway point. The only times I have ever seen it climb higher, I was towing a boat or a fairly heavy trailer at freeway speeds.
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Old 09-16-2011, 12:12 AM
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Mine hovers just below the 1/2 mark most of the time.
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Old 09-16-2011, 12:26 AM
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same here, if I am doing alot of highway driving at 65 mph its slowly works its way up to below 3/4 (talking 12 hour drives) but every day use and driving under 4 hours it hovers slightly higher (its hot down here in TX)

I wouldn't worry about it, your seems normal
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Old 09-16-2011, 03:07 AM
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Quote:
Originally Posted by Drake371 View Post
same here, if I am doing alot of highway driving at 65 mph its slowly works its way up to below 3/4 (talking 12 hour drives) but every day use and driving under 4 hours it hovers slightly higher (its hot down here in TX)

I wouldn't worry about it, your seems normal

when you say, " it hovers slightly higher"...are you saying that your truck hovers slightly higher than what my truck shows in the picture?
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Old 09-16-2011, 11:43 AM
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That's not a normal Temp. You might have a Clog Radiator or a thermostat soon to be a failure due to thermostat being stuck also get the clutch fan checked and Water pump.
Once I rebuild my Engine I replace the water pump and Removed the Clutch fan for an Electric Fan and I went from an 190 degree thermostat to a high Performance Jet 180 Degree Thermostat. The temp never see half way mark and I live in Miami where the Temperature out side is always 95 degrees and up. I posted a Picture below where the Temp sits all day long on highway and traffic.


http://img59.imageshack.us/img59/4784/guages007.jpg

http://img842.imageshack.us/img842/1347/guages005.jpg
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Old 09-16-2011, 01:02 PM
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Quote:
Originally Posted by SuperiorStyles View Post
That's not a normal Temp. You might have a Clog Radiator or a thermostat soon to be a failure due to thermostat being stuck also get the clutch fan checked and Water pump.
Once I rebuild my Engine I replace the water pump and Removed the Clutch fan for an Electric Fan and I went from an 190 degree thermostat to a high Performance Jet 180 Degree Thermostat. The temp never see half way mark and I live in Miami where the Temperature out side is always 95 degrees and up. I posted a Picture below where the Temp sits all day long on highway and traffic.


http://img59.imageshack.us/img59/4784/guages007.jpg

http://img842.imageshack.us/img842/1347/guages005.jpg
His appears to be normal. Yours is lower due to the new thermostat.
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Old 09-16-2011, 01:15 PM
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Everybody is below the half and his is higher which is a caution when the cooling is about to have a problem
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Old 09-16-2011, 08:47 PM
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Flushed the coolant, new t-stat, realized that it has a new radiator (Just bought the truck with 90K on the odo -I thought that it looked new, the dealer confirmed that is was) Well it runs straight up and down now, maybe a little left of center to dead center. goes a bit off center to the hot when I get on it, but the needle is always covering the center mark and it is not very noticeable. Seems much better now. I think he used a 190 T-stat. what it the recommended t-stat temp? Do these trucks have a histor of overheating?

I hear good things about these truck, lots of people have a lot of miles on theirs. Thanks again for all the replies. I will keep ya'll posted.
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Old 09-16-2011, 09:40 PM
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Quote:
Originally Posted by snookomatic View Post
Flushed the coolant, new t-stat, realized that it has a new radiator (Just bought the truck with 90K on the odo -I thought that it looked new, the dealer confirmed that is was) Well it runs straight up and down now, maybe a little left of center to dead center. goes a bit off center to the hot when I get on it, but the needle is always covering the center mark and it is not very noticeable. Seems much better now. I think he used a 190 T-stat. what it the recommended t-stat temp? Do these trucks have a histor of overheating?

I hear good things about these truck, lots of people have a lot of miles on theirs. Thanks again for all the replies. I will keep ya'll posted.
Sounds like you have it worked out then. The OEM stat is 195 I believe. The cooling systems of vehicles is one that tends to be ignored unless there is a problem. IMO this was made worse by the introduction of the 5 year 100k coolant. The problem is that there is no margin of error with these trucks. I dont know about the hemi but the 4.7 has aluminum heads and 1 overheat will create a problem, be it blown head gaskets or warped heads. It is a great engine (160k on mine currently) but really sensitive to heat. I almost risked a head problem with mine by ignoring a coolant leak for a year and a half. That leak was caused by pressure building up in the radiator because it was plugged. I never considered that because the radiator was new when I bought the truck. The radiator finally blew and the temp started climbing.........FAST. Thankfully I was leaving the parking lot at work and able to turn around and shut it down before it got to hot. If I was on the interstate or somewhere else, I may have had to rebuild her.
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