Join Date: May 2007
Location: Baltimore Maryland
Re: temperature sending unit
The intake should have a hole on the front passenger side for the heater hose and another hole either next to it or on the other side front to the side of the stat housing. If not, then just drill a hole. It's only cast aluminum. It's easy to drill. Do not use a "T" on the heater hose and do not use a reducer. The sending unit needs to be in DIRECT contact with the coolant flow. The reducer sets the sending unit back too far to have the coolant flowing DIRECTLY over the sender. It will give you a false reading. Each cylinder head has a hole in it. The drivers side head is between #1 and #3 cylinders and the passenger side head is between #6 and #8 cylinders. If you drill the intake, make sure you put a thick grease on the drill bit so it will collect the shavings. Trust me, it's easy as pie to drill the intake. Get yourself a 1/2"NPT tap. It has to be a NPT tap because all NPT holes are tapered. They get narrower the further they go down. On NPT threads and fittings, it's the threads that do the sealing.
Charlie Knudsen 67 Camaro RS/SS 350 TKO 600, 4.10's, AFR 195 Street Heads, Comp 270H, Rhoads Lifters, Crane Ignition, Pertronix Dizzy, Performer RPM Q-Jet, Heavily Modified Q-Jet, Hooker Comp Headers, MagnaFlow 2 1/2", 144 Decibles(Alpine CDA-7998 Head Unit, RF X7 and RF 750X Amps, MB Quart Mid's & High's, Kicker L7 12" Solo Barics)