Driver's side radiator fan won't come on? - DodgeIntrepid.Net Forums - Dodge Intrepid, Concorde, 300m and Eagle Vision chat
 
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post #1 of 14 (permalink) Old 09-15-2012, 06:12 PM Thread Starter
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Driver's side radiator fan won't come on?

Hello all, first post here. I did some Google searches and that led me to this site.
About 5 days after I bought this '99 Dodge Intrepid w/ 2.7L, it overheated while driving on the freeway. That resulted in replacing the radiator, hoses, thermostat, belts and a pulley. That set us back $1K exactly. Ever since then, it has had a hard time staying below half on the temp gauge on hotter days this summer or when going up a decent hill with the A/C on.

Fast forward 2 months: it started to get hot again - about 3/4 on temp gauge on my wife yesterday on the freeway. Thankfully she saw it and pulled over, waited, and then took some slower back roads home. Today while checking around, I realized there was coolant leaking from somewhere by the coolant reservoir. Sure enough . . . there was a hair line crack in the back side of the reservoir; it's most likely been there all along. Nearly 1 gallon low on coolant.

Replaced the reservoir and cap with new ones from the dealer. Have been burping the level several times today (getting it up to temp on the freeway, and then parking it to cool it off). So far so good. It has not gone above half temp - likes to hang out just below the half mark on the temp gauge now, so this is improvement.

However, I noticed that the driver's side fan never comes on. The passenger's side fan will come on when the temp gauge gets just over the 1/4 mark or so. It will also come on like it should about 5 seconds after the A/C is turned on - I imagine this is when it's registering 250 psi, right?

I also tried the trick someone suggested in a post on here of pulling the coolant temp sensor wires and then starting the engine. The passenger side fan does what it should and comes on full blast. The driver's side fan does nothing.

Please help me on what to try next! My wife and I really love this car, and wish we would have got a 300M now, because we love the front end of that thing even better - but we didn't know anything about that car when we bought this Intrepid. Oh well.

After buying the car, investing in the cooling system, new quality (not cheap) tires, new stereo, new gas shocks for hood and trunk, we are quite into it and need to have it last a while at this point. I would love to be able to feel safer about it not overheating on my wife when she drives 50+ miles on the freeway in it.
Thanks for any help on where to go from here. I really appreciate your time.
Sincerely,
Jed
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post #2 of 14 (permalink) Old 09-15-2012, 06:47 PM
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post #3 of 14 (permalink) Old 09-15-2012, 07:07 PM
That rhythm is INFECTIOUS.


 
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Sounds like you need a new fan assembly... they are wired in parallel, IIRC, so when the fans are told to kick on, they both should run, either on low speed or high. I believe the connector is just 3 pins.
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post #4 of 14 (permalink) Old 09-15-2012, 07:21 PM
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Both fans operate at the same time. I will go with getting a new fan assembly.
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post #5 of 14 (permalink) Old 09-15-2012, 08:08 PM
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Quote:
Originally Posted by MrBigE View Post
Sounds like you need a new fan assembly... they are wired in parallel, IIRC, so when the fans are told to kick on, they both should run, either on low speed or high. I believe the connector is just 3 pins.
That is true for '98, '99, and '00 for all engines, and for 2.7 engine in later years (IOW - not true for 3.2 and 3.5 engines in later years due to differences in the fan motors and the control wiring - see FSM schematics).
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post #6 of 14 (permalink) Old 09-16-2012, 12:20 AM Thread Starter
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Thanks to all of you! So if I'm understanding this correctly - I can just purchase a new fan unit and pop out the old one? I mean, are they are two separate units so I can just leave the passenger's side fan in there when I do this?
I really appreciate the help. It's definitely running cooler with the new coolant reservoir and cap. I'm sure it will be even better when I get both fans working. Sure wish I would have replaced that when the radiator went, but I suppose that tiny crack could have gone undetected for a long time...I'll know what to look for next time!
Thanks,
Jed
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post #7 of 14 (permalink) Old 09-16-2012, 03:56 AM
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OUCH! $1000 for radiator, thermostat, pulley, hoses, and belts? wow.....you got ripped off my friend! The fans should both be running at once.....replace the fan assembly and see what happens.....its 2 10mm bolts and a upward pull and unplugging one plug...do it yourself and save alot of money.....I got mine from the junkyard and was under $100 for my 00' R/T....
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post #8 of 14 (permalink) Old 09-16-2012, 09:52 AM
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The fan is usually replaced as a unit. You *can* replace just the one motor, but for the time, cost, and the questionable remaining life on the "good" motor, the better choice is to replace the whole assembly.

Quote:
Originally Posted by 2ToneR/T View Post
...its 2 10mm bolts and a upward pull and unplugging one plug...do it yourself and save alot of money.....I got mine from the junkyard and was under $100 for my 00' R/T....
You do also have to remove the radiator upper support. The fan assemlby is held in by four M6 bolts. But yes - still worth the labor cost savings. People have generally had good results with the brand new ebay units, and I believe they are under $100.
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post #9 of 14 (permalink) Old 09-18-2012, 12:58 AM
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One of the bolts is difficult to get to but other than that it is not a hard job. Watch this video, it demonstrates the procedure well.

Chris
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post #10 of 14 (permalink) Old 09-18-2012, 01:02 AM
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And this link will take you right to the part you need. http://www.rockauto.com/catalog/rafr...&parttype=2181
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post #11 of 14 (permalink) Old 09-18-2012, 07:06 AM
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The fan mounting bolts are not hard to reach at all, but there is a clip at the bottom that will need some attention after the bolts.
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post #12 of 14 (permalink) Old 09-20-2012, 06:17 PM Thread Starter
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Thanks for the help, guys! Really appreciated. Sorry for my late reply, I had to go out of town for 2 days. I see what you mean about replacing them together, I may as well get the single unit with 2 fans on it.

The reason for the high price on the replacement parts - the radiator literally blew a hole in itself less than a week after we bought the car - but we were many miles away from home and there was no way I could fix it or even try to do anything but have the car towed a few miles to the nearest shop. I tried milking it along for about a 1/4 mile when it happened just to see if I could, but the water was pouring out so fast there was no choice. So we had to pay the big bucks and get the car home the next day.

On a more serious note, I hope there is nothing worse going on with it. We live by the ocean here in Ventura, and days are around high 70s, low 80s tops. Car drives just perfect and temp stays below 1/2 on the gauge. When we took it to LA - inland - over the last 2 days, temps are near or at 100 degrees there, and any decent hill, the temp would start to climb...and I had to really watch it.
Do you guys think the one fan not running could really cause that much difference in the temp, or do you think there might be something else more seriously wrong that I should be looking at too?

Thanks again for your time,
Jed
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post #13 of 14 (permalink) Old 09-20-2012, 06:22 PM
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May have an air pocket in the coolant system that needs to be bled. What type of antifreeze is in it?
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post #14 of 14 (permalink) Old 09-20-2012, 08:07 PM Thread Starter
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It looks like the orange stuff. But it's whatever Firestone put in there when they redid the entire cooling system for $1K...
Any easy way to tell if there's an air bubble or pocket in there?
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