Coolant Problems (yes, im a newb)

[DaMoNe6969]

you dont need no 50/50 mixture... its "recommended" I would say go with about 50/50 if you drive your car summer and winter without changin coolant so its good year round.. I only drive my babies in the summer so I use mostly water with Redline WaterWetter additive.. good stuff..

[89IROC&RS]

chevyracincamaro - you are correct about water cooling better than coolant. and no, 50/50 is not completely nessesary, it is kinda like the 3000 mile rule for oil. someone just kinda said, this is a safe number, lets use it. the 50/50 is to protect for temps to -30 degrees F which most of us wont ever encounter. so running 30/70 for most of us would probly be ok.

4onfloor - well, i do know that the coolant temperature sensor is in the head, but the fan switch sensor is in the side of the block. ive changed it before. took a nice little coolant shower when i did it too lol.

[4onFloor]

the one in the block is the knock sensor, atleast on 3rd gens it is. the one in the passenger head right above it is the fan switch. it's not a variable resistance sensor like on the driver's side head for the temp gauge, though they look identical. it's a thermal switch. at about 220 degrees it grounds out and trips the relay for the fan. go out on one of your 3rd gens and turn the key on, and ground the wire, the fan will come on.

[89IROC&RS]

the knock sensor is on the driver side of the block, the fan switch sensor is in the passenger side of the block. the one in the head, is the temp switch.

[4onFloor]

since when is the knock sensor in the drivers side of the block? every 3rd gen including firebirds that i've seen is on the passenger side, and there was nothing but a plug in the driver's side. then the temp gauge sensor is in the driver's side head. not saying your wrong or that everyone's is the same, but i've actually ground the fan switch wire as a temporary fix on a few cars untill could get a new sensor. and on the fuel injection swap that i did on my truck, the wiring harness is routed for the kock sensor to be on the passenger side, with the temp sensor in the passenger head

[4onFloor]

this is in the driver's side of your block? if it is, it's a new one on me
http://www.thirdgenresource.com/sens...ays__etc__?b=1

[89IROC&RS]

well, ill have to go look on the IROC, but i do know for sure that the fan switch for my RS is on the passenger side of the block. cuz my fan quit on me, and turns out that the fan switch had broke, and the wire was taped onto it making and breaking connection. i replaced the wire, and replaced the sensor, and the fan has worked ever sense. so i know that it was the fan switch.