Why do we do this to ourselves?! We tip toe around some odd engineering choices, will this one fit my truck? It's off by 3 months but still looks the same... Lol.. In the case of the viscous, why not just swap it out entirely w a 10" (?) electric?! Seems a good alternative.. Btw just read the thread on wanting to remove the rear o2 sensors and am feeling a bit salty...
VC fan clutch sanity check
- Thread starter msggunny
- Start date
... until you're flogging your truck up a 6% grade at 80mph in a 120F heat.
That said - a 10" fan isn't enough even for a Civic. If you want to have something close to stock engine-driven fan, look at twin 12" Derale or SPAL electrics - which will set you back like twice or three times the cost of a new genuine fan clutch.
Removing and/or bypassing 02 sensors is simply idiotic.
Just out of interest, we were pulling No2 Son's D2 engine out this week, and I tried to turn the drive nut of the viscous fan to gauge how much torque it needed, which wasn't a lot as it was cold, I thought.
The spare V8 has been sitting around for a couple of years now, but when I pulled the fan off that, it was much harder to turn that Philip's one, which has sat for 4 months without moving.
Not sure what I can read into this, but here we have two units with quite markedly difference turning torques but ostensibly for the same engine.
My own fan tends towards the easier to turn end of the spectrum, like Philip's fan.
Peter
The spare V8 has been sitting around for a couple of years now, but when I pulled the fan off that, it was much harder to turn that Philip's one, which has sat for 4 months without moving.
Not sure what I can read into this, but here we have two units with quite markedly difference turning torques but ostensibly for the same engine.
My own fan tends towards the easier to turn end of the spectrum, like Philip's fan.
Peter
IIRC the fan clutch is supposed to be stored face down. I've definitely run into fans that seemed to be locked up after they sat for extended periods of time. I think the last DII fan clutch I replaced had a warning label stamped into it saying which way to store it.
Didn't know that. It may explain while I found a spare fan clutch leaking fluid - it has been stored face up for months.
FWIW..... I have 180 stat. It also creeps up at idle. If driving, 188-193. Just sitting at idle may get up to 202. The 190 stat NEVER did that, idle temps never changed from running temps. As with other posters, I don't think outdoor temps cooling off really much matter.
Per the Rave manual:
In cold ambient temperatures the engine temperature can be raised by up to 10°C (50°F) to compensate for the heat loss of the 10% exposure to the cold coolant returning from the radiator bottom hose.
Does that mean if I park my truck for a while it needs to be on its nose? :smilelol:
Along this same topic. Are all of the OEM fans noisy? I had a '96 D1 with the Chevy S10 fan/clutch swap and it was much quieter than the '97 I just bought. It sounds like it is spooling up for takeoff!
Not at all. OEM fan is noisy on a cold engine upon the start-up, and it goes quiet in about 20-30 seconds.