I'm helping a buddy from zr2.com install his OHC next Tues. He is also having overheating issues and it seems that his fan clutch isn't engaging, so we figure we'll replace the clutch. He's had the coolant flushed (by a GM dealer), he had the t-stat replaced before having that done. What size wrench do I need to remove the clutch from the water pump shaft? Is the serpentine system enough friction to keep the pulley from turning while un-doing the nut? I know there are GM tools for both tasks, but neither of us figure we'll be doing this again. The Auto Zone loan-a-tool program only has the wrenches (in 2 sizes, 1-9/16" and 2-1/4") for the Ford clutches. Is either one of these the right size? Would a pipe wrench fit on the nut?
Also, can you check on some document numbers for me? They're from the GM service info system and may relate to something I've noticed on my truck, curious what the text is. Document numbers are A000572 (Headlights dimming, flickering while driving) and A001661 (INTERIOR LAMP , HEAD LIGHT FLICKER - BATTERY COURTESY ELECTRICAL FLUCTUATION GENERATOR INTERMITTENT LIGHTS). These both relate to at the least a
2000 S-10 4WD.