93 mx-5 WHIRRRRR

[Stealth5]

how come my friends 93 miata SE makes a weird whirring sound when accelerating, esp. at low rpms?

 

[Equinox]

cause of your whistle tips

 

[KpaBap]

(lol)

(owned)

Could be that JRSC.

 

[Stealth5]

jrsc? i noticed it on an eclipse too, those are the only cars i ever heard it on, its like a whirrr like a fan, but its too loud to be a fan

 

[Darin]

get us a photo of under the hood.

 

[kcbhiw]

I've got a whine that sounds like a super charger. Sounds kind of cool, actually, heh. The pitch changes with RPM.

 

[Stealth5]

its not s/c, totally stock, kcbhiw has it too, im not crazy

 

[kcbhiw]

its not s/c, totally stock, kcbhiw has it too, im not crazy

Yours is coming from the front of the engine (timing belt area), correct? If so, it could be one of three things, water pump, idler/tensioner bearings, or dry bearings on one of ur accessories (alt, PS pump, etc). I'd place my bet on the bearings. It's quite typical for them to age and become 'loose', per se. One more thing, how old's your timing belt? If new, it could be over tensioned. If you decide to replace ur tensioner bearings, do both plus the water pump and timing belt (preventative maintanance). How many miles are on ur Miata?


Side note: I'll be away for a week for work so I may not be able to post any more on this unless I can find access to a computer.