Loud roaring during acceleration

Loud roaring during acceleration

Postby stev30h [OP] » April 12th 2016, 9:13pm

Have a 97 astro LT 175K. Was driving yesterday when i heard this whining noise coming from the engine bay. Then after it whined for a couple seconds the engine started roaring while accelerating. Sounds like its sucking in a bunch of air really. It roars until about 45-50mph, and then it just has a low pitch whining noise. I've checked what vacuum lines i could find. The snorkel and doghouse are all tight. Not sure where else to look. No engine codes, not overheating, oil pressure good, and milage seemed to remain normal. Any advice appreciated!
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stev30h
Fueling (1/4 tank)
Fueling (1/4 tank)
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Extra Info: LT 4.3 V6 RWD

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Re: Loud roaring during acceleration

Postby chevymaher » April 12th 2016, 9:17pm

Check the clutch on the fan. See if it locked up.
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Re: Loud roaring during acceleration

Postby stev30h [OP] » April 12th 2016, 10:31pm

If it's locked up would the fan still rotate? Sorry rookie questions.
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Fueling (1/4 tank)
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Re: Loud roaring during acceleration

Postby sixsix » April 12th 2016, 10:54pm

Yes it will - and your description of "Roaring" is perfect.
Mine, a 92' did the same thing - I installed an AC-Delco OEM Fan - from [email protected]
All better now.

Oh and Welcome to the Forum.



Mike
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"Ban gerrymandering" out 1 side, then says, "We really need to get rid of the electoral college for starters, there is no way in hell that the person that receives fewer votes wins, simply crazy."
So only CAL, ILL & NY Elects??
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Re: Loud roaring during acceleration

Postby stev30h [OP] » April 12th 2016, 11:24pm

Thanks! Forum has helped me a bunch. Is the van drive able with the van clutch locked up? Not sure if I'll have enough time before the sun goes down to fix it.
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Fueling (1/4 tank)
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Re: Loud roaring during acceleration

Postby chevymaher » April 13th 2016, 12:48am

Yes it is fine to drive. You will just have the turbojet sound till you fix it.
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Re: Loud roaring during acceleration

Postby stev30h [OP] » April 13th 2016, 12:52am

Good to know!
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Re: Loud roaring during acceleration

Postby Astrofarian » April 13th 2016, 1:18am

But now, your mileage may vary!
-Mike-
Move along....all is well.....return to your homes.....nothing to see here.
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Re: Loud roaring during acceleration

Postby stev30h [OP] » April 17th 2016, 6:39am

So changed the fan clutch today and no more roaring! Thanks all.
Original Poster [OP]
stev30h
Fueling (1/4 tank)
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Years of Membership: stev30h has been a member for 4 full yearsstev30h has been a member for 4 full yearsstev30h has been a member for 4 full yearsstev30h has been a member for 4 full years
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Re: Loud roaring during acceleration

Postby dkGarnet96 » April 17th 2016, 9:12am

Hey, awesome bit of info in this thread. I always wondered why my van made this sound.
-96 AWD 350k- R.I.P with a spun bearing
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Re: Loud roaring during acceleration

Postby sixsix » April 17th 2016, 11:54am

stev30h wrote:So changed the fan clutch today and no more roaring! Thanks all.

Good for you Steve !!! Now... go on and fix those other things. LOL



Mike
.

"Ban gerrymandering" out 1 side, then says, "We really need to get rid of the electoral college for starters, there is no way in hell that the person that receives fewer votes wins, simply crazy."
So only CAL, ILL & NY Elects??
User avatar
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