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  #1  
Old 09-06-2007, 05:51 PM
meltedpanda's Avatar
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Auxillary Fan Question 72 450SL

My manual states that it should come on at 212 degrees F
but mine cranks up at about 175 degrees. I am beginning to think my temp gauge is off or my senders are bad, before I start replacing willy nilly I thought I would ask who has been there done that
Basically, temp gauge stays steady at 175-180 degrees , fan comes on when she gets near top temp ( 175-80) so basically it runs alot. Of course it is bloody hot here, I am not running AC, I prefer top down.
any ideas? perhaps just normal for 35 year old car????
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2011 Porsche Cayman - Bond,James Bond
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  #2  
Old 09-06-2007, 10:28 PM
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Ron, check your temp with an IR thermometer perhaps right where the sensor that looks like this is:
http://img.eautopartscatalog.com/live/G503012319BEH.JPG

If it's not 212 or higher, the sensor is bad. They can eventually wear with age, turning on too soon. If I don't have a spare you can pick up a new one, but I think I owe you for that hood latch still so if I can find a spare (which I won't have time to look for until MAYBE Sun PM, as I'm going on vacation this weekend), I'll send it your way.
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  #3  
Old 09-06-2007, 11:14 PM
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thanks Tom, I think that may be my issue, everything else seems OK, i figure I will change it out when I do the coolant flush. Let me know if you find your "spare"
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Ron
2011 Porsche Cayman - Bond,James Bond
99 E320 THE Queen Mary
62 220b - Dolly - Finally my Finny!
72 450SL, Pearl-SOLD
16 F350 6.7 Diesel -THOR
07 Lexus RX 350 - Lexi
14 38HP John Deere 3038E Tractor -Mean Green
84 300SD, Benjamin -SOLD
71 220 - W115-Libby ( my first love) -SOLD
73 280 - W114 "Organspende" Rest in Peace
81 380 SL - Rest in Peace
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  #4  
Old 09-10-2007, 09:30 PM
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I have found 3 sensors Ron - but not 1 is a 212 switch. I'll look in my spare parts bin but I doubt I have it there. I need to check the bin when it's light in my garage!
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  #5  
Old 09-11-2007, 06:44 AM
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I see there are for sale out there replacement fan switches that run the fan at 90 C which is close to where yours is coming on. Does it have a temp stamped on it & could it possibly been changed out by a PO in the past? Just a thought....
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  #6  
Old 09-11-2007, 10:48 AM
meltedpanda's Avatar
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perhaps that is the case.
I have decided to change mine out, don't stress tomguy, just thanks for looking.
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Ron
2011 Porsche Cayman - Bond,James Bond
99 E320 THE Queen Mary
62 220b - Dolly - Finally my Finny!
72 450SL, Pearl-SOLD
16 F350 6.7 Diesel -THOR
07 Lexus RX 350 - Lexi
14 38HP John Deere 3038E Tractor -Mean Green
84 300SD, Benjamin -SOLD
71 220 - W115-Libby ( my first love) -SOLD
73 280 - W114 "Organspende" Rest in Peace
81 380 SL - Rest in Peace
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  #7  
Old 09-11-2007, 06:36 PM
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aux fan

why worried it kicks on too soon? I am mad mine kicks on too late. seems to me early is better?
Quote:
Originally Posted by Tomguy View Post
Ron, check your temp with an IR thermometer perhaps right where the sensor that looks like this is:
http://img.eautopartscatalog.com/live/G503012319BEH.JPG

If it's not 212 or higher, the sensor is bad. They can eventually wear with age, turning on too soon. If I don't have a spare you can pick up a new one, but I think I owe you for that hood latch still so if I can find a spare (which I won't have time to look for until MAYBE Sun PM, as I'm going on vacation this weekend), I'll send it your way.
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  #8  
Old 09-11-2007, 09:41 PM
meltedpanda's Avatar
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perhaps, but its not right, as you can tell by my many posts, I like things the way they are suppose to be
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Ron
2011 Porsche Cayman - Bond,James Bond
99 E320 THE Queen Mary
62 220b - Dolly - Finally my Finny!
72 450SL, Pearl-SOLD
16 F350 6.7 Diesel -THOR
07 Lexus RX 350 - Lexi
14 38HP John Deere 3038E Tractor -Mean Green
84 300SD, Benjamin -SOLD
71 220 - W115-Libby ( my first love) -SOLD
73 280 - W114 "Organspende" Rest in Peace
81 380 SL - Rest in Peace
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