I drove my wife's Sequoia yesterday and am wondering about the "roar" coming from the engine bay. The 4.7 liter always makes this roaring noise on initial cold start-up which I am assuming is normal. It lasts maybe 15 or 20 seconds and goes away.
However, yesterday we were running a little late for our baseball game so I was a little heavy on the throttle. Anytime the engine downshifted or rpm's increased I got the same roar coming from the engine. Sounds like a jet taking off! I don't drive it much but I don't recall this happening before.
Is this the sign of a failing fan clutch? What is the best way to diagnose? I have heard they can be rebuilt or new fluid put in them if bad? Doesn't seem to be overheating but we don't do much stop and go traffic out here in the country. Any suggestions? thanks.
However, yesterday we were running a little late for our baseball game so I was a little heavy on the throttle. Anytime the engine downshifted or rpm's increased I got the same roar coming from the engine. Sounds like a jet taking off! I don't drive it much but I don't recall this happening before.
Is this the sign of a failing fan clutch? What is the best way to diagnose? I have heard they can be rebuilt or new fluid put in them if bad? Doesn't seem to be overheating but we don't do much stop and go traffic out here in the country. Any suggestions? thanks.