Page 3 of 3 FirstFirst 123
Results 41 to 42 of 42

Thread: Fan / fluid coupling (fan clutch)

  1. #41
    Administrator timsrv's Avatar
    My Van(s):
    Lots of them
    Join Date
    Jun 2010
    Location
    SW WA ST
    Posts
    5,507
    Blog Entries
    14
    Rep Power
    10

    Re: Fan / fluid coupling (fan clutch)

    I agree that aftermarket brands might not measure up, but come on, do you really think some guy bumbling around in his garage has learned more than the engineers who designed this clutch? I'm sure his "scientific" calculations as to the exact volume of silicone would far exceed theirs....... . Regarding silicone levels, if you end up with not enough silicone, the fan will slip (won't move enough air). If you end up with too much, it will not disengage. If I had to guess, I'd speculate he has hydraulically locked his clutch. Yes, this would be better than a clutch that doesn't engage, but it would unnecessarily rob power and decrease fuel mileage. IMO opening a working clutch in an attempt to improve is a silly waste of time. I understand these tactics become necessary when things break and parts are NLA, but when you can get a new OEM clutch for ~$90, it just doesn't make sense.

    These OEM clutches last about 150k miles. Considering what they do and the extreme environment they operate in, I say replace with a new OEM unit (Aisin) every 150k miles (or when it malfunctions) and forget about it. Tim

  2. #42
    Van Addict
    My Van(s):
    Blue 1987 4wd 5-speed Hi/Lo Manual Hubs
    Join Date
    Nov 2010
    Location
    oregon
    Posts
    382
    Blog Entries
    1
    Rep Power
    1

    Re: Fan / fluid coupling (fan clutch)

    Not sure it's in this thread but the lower shroud is usually missing on these vans and that makes a huge difference with cooling and clutch fan operation. I didn't even know it existed until somewhat recently thanks to Tim. My van gets hot on the hills-doesn't overheat but still has me staring at the temp gauge-I will eventually add a piece of sheet metal to make up for the lost lower shroud, or go the electric fan way.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •