I rebuilt my alternator recently and thought I botched the job as a growl came back from underhood.
This morning Ive tracked it down with my trusty Nautic Blue colored hose, and it is, in fact the CVVT hub on the exhaust side making the noise.
No codes, but here is the giveaway.
On cold start, the noise comes on about 3 seconds after start - when the oil pressure goes up and pressurizes the CVVT hub.
My T5 has CVVT exhaust only - since Im up to 175k miles, I might do water pump too.
The sound is a low frequency whir-whir-whir-whir like low speed blender
Updated repair thread here
viewtopic.php?f=1&t=83008&p=453450#p453450
1999 V70 T5 Manual CVVT hub noise
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abscate
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1999 V70 T5 Manual CVVT hub noise
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
Link to Maintenance record thread
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
Link to Maintenance record thread
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