Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
This thread got way off base. I’d really like to know peoples thoughts on the question though. I’ve been given a fan clutch twice that never seems to shut off. I’m need to order a new one but I don’t want to order the wrong one.
What ambient temp are you running in? When it is 90-100*F or more outside mine rarely shuts off. There are times when I hear it kicked in and roaring at 75 mph climbing a long-sustained grade. In stop and go or around town you will hear it the whole time the engine is running and up to temp. It couples the fan whenever additional cooling is needed like it is supposed to.
I ended up getting a Hayden 2734 (Link below) and installing it with an 11 blade fan yesterday. It does seem a little better but still seems to stay on quite a bit (Texas 80-100 deg all the time). I'll get some drive time in and update. The clarify, it does turn off but my observations in the past is that it is on quite a bit. I just don't seem to remember hearing it run hardly ever years back and never had cooling issues.
Not sure where you guys come up with the 195°F stat thing. I run 170°F stats because the knock retard is not turned on until ~165°F in most GM setups. Fuel enrichment ends and closed loop happens in the 120-140°F range. Thermostat temp does not change how quickly the engine gets from cold start to 160-170°F. On a 40°F cold start, in under a minute my L31 was in closed loop using short term fuel trims, same for the 383. Long terms are enabled at 133°F.
I think the 195° thing is for emissions more so than fuel trims.
