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mike c, toyota master diagnostic technician
Category: Toyota
Satisfied Customers: 620
Experience:  toyota certified master diagnostic technician ase and hybrid certified
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2002 toyota Sequoia: a roaring noise starting out from 0..hot days

Customer Question

I have a 2002 toyota Sequoia. It is making a roaring noise starting out from 0 until up to speed. It seems to do this more on hot days. It does not always do t.
Submitted: 5 years ago.
Category: Toyota
Expert:  mike c replied 5 years ago.

hello.. what you need to do is when it is making the roaring sound put it in park or neutral and rev the engine a few times a see if you hear the same noise..

i suspect you may have a bad fan clutch.. when they go bad the fan clutch can roar like an airplane taking off..

if you can try this and then get back to me if you need further assistance.. thank you

Customer: replied 5 years ago.
I will try this and see what happens.
Expert:  mike c replied 5 years ago.
ok let me know..
Customer: replied 5 years ago.
okay, I tried it and at first it was not doing the roaring thing (and it is 103 degrees)...then it started to do it. In park or nuetral it still makes the roaring sound. Also, in park just sitting there idling, I noticed the A/C recirculate button flashing on and off and the A/C seemed to not be working as well as when I am moving. Could this be related? I have owned this car since it was new and it has 120,000 trouble free miles. thanks.
Expert:  mike c replied 5 years ago.

it sounds like a different issue with the ac light flashing..

whenthe ac light is flashing than the ac has detected a probelm in the ac clutch or ac electrical circuit.. there is a service bulletin on your ac compressor if you have rear ac also...

i would be pretty confident you have a bad clutch fan , the engine has to get warmed up to operating temp before the clutch fan will engage of lock so if it took a little while and then does it in park and on accel i would say that you need to replace the fan clutch..

hope that helps.. if you have the rear ac and want a copy of the service bulletin you would be out of warranty on this let me know and i can send it to you..

Customer: replied 5 years ago.
I do have the rear A/C also, and would appreciate if if you sent me a copy of the service bulletin. I plan to take it in for the 120,000 routine maintenance this week. Is it okay to keep driving it until I get it in? Just to clarify....the A/C recirculate button below the A/C button is the one randomly turning off. thank you.
Expert:  mike c replied 5 years ago.

if you are just driving local trips it should be ok to drive.. keep an eye on the temp gauge because with the clutch fan roaring it is not pulling enough air through the radiator..

the bulletin i was pertaining to deals with the improved ac parts for your vehicle as some of the compressors were failing prematurely on your model i have attached the link dont know if that is your probelm or not..

Download link: http://www.mediafire.com/file/wmyzdmwixwy

mike c, toyota master diagnostic technician
Category: Toyota
Satisfied Customers: 620
Experience: toyota certified master diagnostic technician ase and hybrid certified
mike c and 5 other Toyota Specialists are ready to help you
Customer: replied 5 years ago.
okay, thanks for your reply. I will be taking this in to be serviced. I will keep an eye on the temp gauge..it has not heated up so far. thank you for your help.
Expert:  mike c replied 5 years ago.
thank you have a good day..

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mike c
mike c
master diagnostic technician
620 Satisfied Customers
toyota certified master diagnostic technician ase and hybrid certified