Loud rushing sound when accelerating

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Author Message   Corey (Discobro) Member Username: Discobro Post Number: 244 Registered: 12-2002 Posted on Wednesday, July 23, 2003 - 05:18 pm:    When I start the rig from sitting for a while and start to accelerate there is a loud rushing noise like a fan or something. It stops after I get over about 20 mph and keep accelerating. It doesn't do it again until I stop completely and start again or if I'm going at low speeds with a lot of load (A/C, blower on HI, stereo on, etc). Is this normal? It doesn't seem to affect the performance. Just curious if I should be on the lookout for something.   Peter Matusov (Pmatusov) Senior Member Username: Pmatusov Post Number: 939 Registered: 09-2002 Posted on Wednesday, July 23, 2003 - 05:21 pm:    most likely, it's your engine fan. check your fan clutch if it bothers you.   Corey (Discobro) Member Username: Discobro Post Number: 246 Registered: 12-2002 Posted on Wednesday, July 23, 2003 - 05:28 pm:    Will it cause any damage down the road? The sound doesn't bother me - it actually sounds kind of cool. Like a 747 taking off...   Peter Matusov (Pmatusov) Senior Member Username: Pmatusov Post Number: 940 Registered: 09-2002 Posted on Wednesday, July 23, 2003 - 05:53 pm:    you should hear it - - upon a cold start, for up to a minute, - when you climb up a steep grade on the highway, - when you turn on the A/C things like that. From what you write, it sounds more or less like it. The cold engine thing - I don't know and I haven't checked whether Rover's fan clutch works the same as the others, but the regular Hayden clutch will be stiffer when cold, then "thaw out," then stiffen up again.   Rob Davison (Nosivad_bor) Dweb Lounge Member Username: Nosivad_bor Post Number: 729 Registered: 02-2003 Posted on Wednesday, July 23, 2003 - 05:54 pm:    it's hot out and the viscous coupling fan is locking up and cooling the engine better. it is supposed to do this. you probably notice power loss and that it happens most on hot days. rd   Corey (Discobro) Member Username: Discobro Post Number: 249 Registered: 12-2002 Posted on Wednesday, July 23, 2003 - 06:24 pm:    yes there is a slight power loss when I hear the noise and on hot days usually with the AC going. Thanks for the info! One less thing to worry about...   Brian J. Rohan (Rover_wannabe) Member Username: Rover_wannabe Post Number: 79 Registered: 09-2002 Posted on Wednesday, July 23, 2003 - 07:59 pm:    Here I thought it was all the gas rushing by my ears from the tank to the engine.   Eric (Epuffy) New Member Username: Epuffy Post Number: 12 Registered: 07-2003 Posted on Wednesday, July 23, 2003 - 08:04 pm:    I was told by my friend (who's a Land Rover tech) that it was sound of the compression spreading to the rear wheels. I don't know if he worded it like that, I could be wrong. But basically it was the engine pushing air to the back wheels to make them work in 4 wheel drive. Is that right?   Rob Davison (Nosivad_bor) Dweb Lounge Member Username: Nosivad_bor Post Number: 731 Registered: 02-2003 Posted on Wednesday, July 23, 2003 - 08:16 pm:    your tech friend is half right or maybe you heard it wrong. it is actually a hot liquid rushing back to the rear wheels to make it 4x4. the viscus fan turns on and pumps it back.   Eric (Epuffy) New Member Username: Epuffy Post Number: 14 Registered: 07-2003 Posted on Wednesday, July 23, 2003 - 08:56 pm:    i see. I agree it sounds cool like a jet, and muffles the sounds of a damn squeak coming from my wheels!