7400 vortec electric fan sensor.

Mar 28, 2007 6 Replies
E

I have a motorhome with the 7400 Vortec 450 hp. engine. I suspect the electric fan is not coming on as needed. I cannot find the sensor for it. As a second question, does the sensor provide for two speeds or is it only a on/off switch. Also does it switch the hot 12v or does it switch the ground side.



The reason I'm concerned is when I stop for a stop light the temp gauge goes to the red. As soon I begin to move the temp remains in the normal I have ruled out a voltage problem and the fan is good. Hills are no problem.



Any help in locating the sensor / switch.



Thanks, Ed


Vote
Twitter Facebook LinkedIn
E

I forgot the chassis is a 96 Chevy.

Vote
Twitter Facebook LinkedIn
S

The LS6 version put out 450HP, LS7 was 465HP. Both picked up 50 horse with just headers.

Vote
Twitter Facebook LinkedIn
S

Yeah. Let's take them down to the dyno. I'll bet they don't do an ounce over 300.

Vote
Twitter Facebook LinkedIn
A

Maybe so, but that was in the old gross HP rating. But I seriously doubt that his 1996 Motorhome 7.4L Vortec is "the 450HP" version. Seeing as how it's the first SFI year with a 9:00:1 compression rated at 290HP / 410 Lb Ft Torque factory.

Vote
Twitter Facebook LinkedIn

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required