Clutch or flex fan...
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds / (Old System)

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Page 1 of 2 1 2 LastLast
Results 1 to 15 of 17
500, 472, 425, 368 Discussion, Clutch or flex fan... in Cadillac Engine Technical Discussion; Hello, I got some problems with overheating some hot days in my 500 DeVille -68, and I wonder if a ...
  1. #1
    caddyswede's Avatar
    caddyswede is offline Cadillac Owners Member
    Automobile(s): Cadillac deVille sedan HT-68
    Join Date
    Sep 2005
    Location
    Sweden
    Posts
    52

    Clutch or flex fan...

    Hello, I got some problems with overheating some hot days in my 500 DeVille -68, and I wonder if a clutch fan is so much better than the flex fan I've got? What about the distance between fan and radiator, how much should it be?

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    Fleetwood472 is offline Cadillac Owners Fanatic
    Automobile(s): 78 Fleetwood w/ FI 472/ Switch pitch TH400
    Join Date
    Aug 2005
    Posts
    236

    Re: Clutch or flex fan...

    The thermal Clutch fan is definantly better. Replace that flex fan you will definantly notice the difference. What brand is the flex fan?

    - Justin

  4. #3
    terrible one's Avatar
    terrible one is offline Banned
    Automobile(s): 1976 Eldorado project
    Join Date
    May 2005
    Location
    El Dorado, Arkansas
    Age
    24
    Posts
    1,631

    Re: Clutch or flex fan...

    The problem doesn't lie within your fan. It's probably the radiator or t-stat or something. Most likely you just need to have your radiator replaced or rodded.

    Oh BTW Justin, got your MO sent out today. Sorry for the delay.

  5. #4
    zonie77 is offline Cadillac Owners Connoisseur
    Automobile(s): 94 ETC,97 STS
    Join Date
    Sep 2003
    Location
    Arizona
    Posts
    3,531

    Re: Clutch or flex fan...

    There is a large variation in flex fans. Some are stronger than clutch type, some weaker. Are the blades fairly large on the fan or very small?

    A thermal clutch has oil in it that stiffens when warm. It cools more when the radiator heats up. This is the preferable one.

    I'd start with the thermostat and check the radiator first...unless it's a fan with small blades.

  6. #5
    terrible one's Avatar
    terrible one is offline Banned
    Automobile(s): 1976 Eldorado project
    Join Date
    May 2005
    Location
    El Dorado, Arkansas
    Age
    24
    Posts
    1,631

    Re: Clutch or flex fan...

    The fans are very large. They push a lot of air. Why would it start overheating now? The fan has been fine for years. I'm still betting on the radiator.

  7. #6
    zonie77 is offline Cadillac Owners Connoisseur
    Automobile(s): 94 ETC,97 STS
    Join Date
    Sep 2003
    Location
    Arizona
    Posts
    3,531

    Re: Clutch or flex fan...

    Now I'm confused...who's car is this???

  8. #7
    terrible one's Avatar
    terrible one is offline Banned
    Automobile(s): 1976 Eldorado project
    Join Date
    May 2005
    Location
    El Dorado, Arkansas
    Age
    24
    Posts
    1,631

    Re: Clutch or flex fan...

    caddyswede's 68 Deville

  9. #8
    zonie77 is offline Cadillac Owners Connoisseur
    Automobile(s): 94 ETC,97 STS
    Join Date
    Sep 2003
    Location
    Arizona
    Posts
    3,531

    Re: Clutch or flex fan...

    OK, are you sure which flex fan he has?

    I agree that flex fans don't usually go bad. Clutches go bad more often.

  10. #9
    caddyswede's Avatar
    caddyswede is offline Cadillac Owners Member
    Automobile(s): Cadillac deVille sedan HT-68
    Join Date
    Sep 2005
    Location
    Sweden
    Posts
    52
    Thread Starter

    Re: Clutch or flex fan...

    So here does it look.

  11. #10
    JTraik is offline Cadillac Owners Enthusiast
    Automobile(s): '68 DeVille '95 FWB '99 Eldo '96 Cummins Ram 5MT
    Join Date
    Mar 2004
    Location
    Rochester, NY
    Age
    28
    Posts
    763

    Re: Clutch or flex fan...

    AHHH!!! You have no shroud!! That is certainly causing a problem, get a shroud on there man.

  12. #11
    terrible one's Avatar
    terrible one is offline Banned
    Automobile(s): 1976 Eldorado project
    Join Date
    May 2005
    Location
    El Dorado, Arkansas
    Age
    24
    Posts
    1,631

    Re: Clutch or flex fan...

    Quote Originally Posted by JTraik
    AHHH!!! You have no shroud!! That is certainly causing a problem, get a shroud on there man.
    Beat me to it!

  13. #12
    The Ape Man's Avatar
    The Ape Man is offline Cadillac Owners Connoisseur
    Automobile(s): '80 Fleetwood Coupe, 1994 and 1995 Mercedes 140 Coupe
    Join Date
    Feb 2005
    Location
    Southern NJ
    Age
    52
    Posts
    2,096

    Re: Clutch or flex fan...

    Is that a Bosch alternator on there?

  14. #13
    caddyswede's Avatar
    caddyswede is offline Cadillac Owners Member
    Automobile(s): Cadillac deVille sedan HT-68
    Join Date
    Sep 2005
    Location
    Sweden
    Posts
    52
    Thread Starter

    Re: Clutch or flex fan...

    Ok, now I know what a shroud is... I hope I can found someone here in Sweden. That's why the distance between fan and radiator is so big, with a shroud on, it doesn't matter. Thanks!

    Yes, it's a Bosch alternator.

    It's a lot of work with my car, you can follow it here: http://www.cardomain.com/memberpage/690250

  15. #14
    472's Avatar
    472
    472 is offline Cadillac Owners Fanatic
    Automobile(s): 55 60S, 81 DeVille (Diesel), 83 Coupe (507), 84 Wood (425)
    Join Date
    Dec 2004
    Location
    PDX
    Age
    31
    Posts
    119

    Re: Clutch or flex fan...

    Good eye, Ape Man. I doubt a 7122 (or 7127) alternator is that easy to come by in Sweden.

    A shroud will definately help - up to solve - the problem. Disputes aside, cooling differences are actually marginal between a thermal clutch setup compared to a properly set up clutch-less system.

    Just a note: I think it was HotRod that compared a flex to clutch setup and found a mere 2-5hp gain, and only at almost 6,000rpm... no thanks. That clutch is just one more thing to fail.

  16. #15
    terrible one's Avatar
    terrible one is offline Banned
    Automobile(s): 1976 Eldorado project
    Join Date
    May 2005
    Location
    El Dorado, Arkansas
    Age
    24
    Posts
    1,631

    Re: Clutch or flex fan...

    caddyswede, nice page. I'm digging your car. Great job!

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Bookmarks

Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
Read about Lincoln | Buick | Kia Forte Forum
Need products for your Cadillac? Check out your options at the links below:

custom floor mats | Cadillac Chrome and Black Chrome Wheels | window tinting