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My Viper is running HOT! (250 degrees)

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My Viper is running HOT! (250 degrees)
Old July 3rd, 2013, 11:21 PM   #1
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Exclamation My Viper is running HOT! (250 degrees)

A week ago a notice came from the DMV to SMOG my Viper, So I took it to a star smog station, It was a very hot day (about 102 F outside) and I filled the viper with premium gas and drove it around a bit, I stopped at the smog station and kept the car running, then 10 minutes later the smog tech took it onto the smog dyno and went through the testing, it passed nicely.

Now I sit back in the car and start driving and the little red thermometer light on the console is ON and the gauge shows 250 F!!

I shut the car off in shade in the nearest parking lot (luckily at the mall) and walk around the mall for 3 hours. I figure the engine running for so long during the smog without air flowing into the radiator was the issue.

I started it up later and it went back to normal 190''' position, but climbed higher as I drove home. When I reached my garage/home it was around 225-230.

Im beginning to worry. it's has always been at the 190''' mark and never at 250'

Should I:
  • Change/flush coolant system?
  • Replace thermostat?
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Last edited by E_Tar; July 4th, 2013 at 01:54 PM.
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Old July 3rd, 2013, 11:39 PM   #2
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Your stat could be shot. Id start there.. water pump also may be on the way out. ..


you have not been on in a while, nice to see you.. sorry about your problems
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Old July 3rd, 2013, 11:44 PM   #3
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Quote:
Originally Posted by kanadianpride View Post
Your stat could be shot. Id start there.. water pump also may be on the way out. ..


you have not been on in a while, nice to see you.. sorry about your problems
Thanks Kanadianpride. I haven't logged into any of the forums I frequent because i've been so fucked in the head. I was having business problems over the last 4-5 months, lots of stress and depression.

I'm a bit better now. I added a new car to my little stable, see my sig below. feeling positive.
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Old July 4th, 2013, 12:20 AM   #4
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I bet it's your fan relay. Are your fans kicking on?

Pull the relay cover on your power distribution center (located next to the fuse box under the hood). You have 3 relays in there, 2 are for the fans. Pull the 2 fan relays and check the red plastic underneath. If it's scorched, you probably have the same problem us Texans have.

There are a few write-ups on here about ways to fix that.

Another note: I went through all the shit to fix the wiring heating up (new wires in the PDC, removed the red plastic, smeared dielectric grease on new relays), but the actual harness at the fan was burned up pretty bad. I just cut the connectors off tonight and put in quick disconnects with much larger contact points so hopefully the current won't bottleneck there any more. I haven't run it yet.
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Old July 4th, 2013, 12:41 AM   #5
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Gen2's are known for burning out the wires at the fan connection.
Very easy to check visually.
This would defintely be my first check as i have seen sooooo many do this exact thing. You could buy a new connector if you disconnect it and it is indeed fried, or cut and splice, either will get you back on the road.

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Old July 4th, 2013, 02:42 AM   #6
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Thanks guys.
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Old July 4th, 2013, 06:04 AM   #7
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Make sure your water pump is floWing.
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Old July 4th, 2013, 09:40 AM   #8
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If the other suggestions don't resolve it, check your radiator. They are old enough that the welds of the end tanks can fail. That happened to me last year. Never had a drop of fluid on my garage or anything that would lend me to believe it was leaking/steaming off.

Had it re-cored based on my mechanic's recommendation as the OEM materials were more efficient than the all aluminum in his opinion. Never had heat issues with my heads/cam GTS prior, but after the re-core, it seems to cool more efficiently then prior.
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Old July 4th, 2013, 10:54 AM   #9
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Let us know who wins the troubleshooting contest
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And the winner is....
Old July 4th, 2013, 01:30 PM   #10
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And the winner is....

Quote:
Originally Posted by jasontiff View Post
Let us know who wins the troubleshooting contest
JASONTIFF!!!

You were right, checked my relays and guess what the fan relay was scorched. it even burnt a bit of the red base cover.. here's a pic..

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Old July 4th, 2013, 01:49 PM   #11
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What's normal temp for standing still...... Not cruising?


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Old July 4th, 2013, 01:54 PM   #12
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JASONTIFF!!!

You were right, checked my relays and guess what the fan relay was scorched. it even burnt a bit of the red base cover.. here's a pic..

I call bullshit your just sucking up trying to get a free shirt.
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Old July 4th, 2013, 01:57 PM   #13
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What's normal temp for standing still...... Not cruising?


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It has always been at around 190-200 at the most. Im guessing the fan not running would cause the temp to start climbing.
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Old July 4th, 2013, 02:44 PM   #14
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Quote:
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what's normal temp for standing still...... Not cruising?


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98.6
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Old July 4th, 2013, 02:46 PM   #15
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If your car is fine at highway speeds I call radiator fans. If its still getting hot even above 50-60 mph then I'm wrong...or only partially right
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Old July 4th, 2013, 02:56 PM   #16
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You can also just start your car in the garage with the hood open. Let the car idle until it reaches the temperature the fans are supposed to kick on. Mine are set at 170. If they don't come on you know it's your relays, your fuse or some wiring with the fans. If they do turn on and you still heatsoak that's probably a radiator.
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Old July 4th, 2013, 04:46 PM   #17
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Just install a 98.6* thermostat and some skel stripes and call it chilled out.
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Old July 4th, 2013, 05:35 PM   #18
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Quote:
Originally Posted by E_Tar View Post
It has always been at around 190-200 at the most. Im guessing the fan not running would cause the temp to start climbing.
ok mine is at 190 within 2 minutes of driving and remains that unless im sitting in traffic. Then It can go to 215. The fan kicks on and drops the temp fast. I wish it would come on earlier though
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Old July 4th, 2013, 05:47 PM   #19
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Nice find I had the relay mod done last week as well it was pretty simple
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Old July 4th, 2013, 05:48 PM   #20
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So u guys think it's best to have the second fan come on around 170 deg?
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