i got the swap done and i was hearing noises from the water pump so i changed it because the car war running hot. my questions are now that i replaced the water pump the temp gauge show it running hot. i had a pcm tune that controls the fans, 2 mins after starting both fans kick on and the temp gauge rises fast. i purchased the stock 2000 camaro thermostat but i cant figure it out. could it be the temp sensor on the front side of the motor on the drivers side. i hooked the odb2 tester to it and the code is P0118-power train engine coolant temperature circuit high output. any ideas please

 

sounds like you have air in the system still, disconnect the hose running to the coolant passages in the heads and let it keep flowing until a stead stream of coolant comes out then reconnect that hose, you might need to jack up the nose of the car to get it to burp out all the air.

 

LS engines are tough to refill w/ coolant because the thermostat is an inlet to the block, not an outlet like previous designs. On a dry engine, there's no coolant at the stat to heat up and open it...engine overheats quickly after initial startup.

I refill mine by disconnecting the upper rad hose and pouring coolant down the hose directly into the block. Works every time.

 

Way I do it too. Never hurts to drill a 1/8" hole in the t-stat to prevent a total seal

 

Thanks pocket. Would I drill the hole down the center of the t-stat cause it integrated in the housing.

 

So I found out why the engine trough the code p0118. I had connected the coolant gauge wire from the c100 (green wire/may have white stripe) to my stand alone ls1 harness connector that lead to the temp sensor. I had I connected to the yellow wire which gave a reading for a sec then the gauge went straight to overheated. My next question is where should I connect the green wire to because I can't tell of its overheating or not. Also where does the tach wire go. Only gauge working is the battery.

 

Should I do that on a cold start.

 

 

Is that for a 91 Camaro. The connector to the temp sensors are yellow and black only 2 wires. If the c100 isn't available can I just trace the wire from the gauge connector. I dispose of the c100 connector as I didn't need it

 

Is that for a 91 Camaro. The connector to the temp sensors are yellow and black only 2 wires. If the c100 isn't available can I just trace the wire from the gauge connector. I dispose of the c100 connector as I didn't need it

 

Pour cold coolant into a hot engine and you'll have an expensive coffee table base with a crack in it.

Coolant goes into a cold engine only.

 

The yellow and black wires go to the LS1 harness, find the schematics posted here and whip out your soldering iron.

The blue wire goes to your in-dash temp gauge via the 3rd gen C100 located on the firewall near the brake booster.

 

Thanks a lot guys. I'm no mechanic, but I don't want to sound stupid. Ok so how does the blue wire connect to the yellow or black wire. I see the schematic but I don't understand it. Frustration is starting to turn to smiles.

 

So I did some thinking and I realized that I purchased a new dash harness from third gen ranch and it was from a 92 trans am. That's why my service manuals don't match when I double checked about the temp gauge wire from the c100. So now I have several issues. My tach don't work, my speedo doesn't work, my oil pressure gauge doesn't work and I made all those connections from the c100 to my standalone ls1 harness. Does anyone know where I could find that c100 snout for a 91 or 92 transam. The harness otherwise works well and I changed it because my z28 had only power locks.

 

that wire is green. i have traced it back to the guage. the service manuals say they are green. i dont know what blue wire you speak off

 

From the C100, its dk grn

From the 3 wire connector, it can be any number of colors from dk blu, dk grn, brn etc

Colors arent as important as pin assignments. They're handy when troubleshooting but often fall short in conversions because the beginning often isnt the same as the end

 

The diagram Pocket posted has a wire descriptor of "DK BLU" and that's the wire I'm pointing out.

 

i understand. but my connector to the temp sensor has two wire plug in. yellow and black only. the 6.0l is from a silverado 2001. i was reading another thread that said use another temp sensor on the other side of the head in the rear where the plug is just above the exhaust manifold. i have one wire and the sensor ask for two. i am just getting frustrated. my oil pressure, fuel and tach are still out. believe me guy i search and read threads. thanks for the help.

 

Diagram is for a 98 Fbody 3 wire CTS. 99+ LSx engines use the two wire you have which will not drive your gauge. Swap the sensor and solder a new connector on. BLK to pin A Yel to pin B whatever is left to your C100 coolant gauge wire (Grn)