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Screech from motor

spinaldex

NAXJA Forum User
Location
Oregon City, OR
https://www.youtube.com/watch?v=aiNLpJL5_kE

It wasn't doing this a couple days ago. The two changes I've made recently are:

New Cam Sync & Oil Drive
ZJ Fan Clutch


Now, the noise doesn't seem to be coming from the fan. First thought I had was that its touching the radiator, but its no where close.

Its REALLY hard to tell where its coming from ... but it seems like its more in the direction I'm pointing the phone ... maybe on the passenger side half way down the motor? Maybe near the Oil drive or inside the motor? Again, I could be totally wrong ...
Also, it doesn't happen if I rev it slow, only if I hammer on it quickly.

Anyway, any ideas?
 
The audio on that clip is noisy to my ears and really can hear what you are talking about.
When the ZJ clutch is installed the fan will spin 80-90% of engine speed vs 60-70% so there can be a Jet Engine whining sound when the engine is rev'd up.
This could be what you are hearing.
 
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