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noise in oil lines (vibrating the radiator) when first started in am.noise gone in 5 minutes V70-XC70 1999

posted by  toyflyr on  Mon Nov 25 12:57 CST 2002
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I have a 1999 xc that has a vibration noise described better as a course hum
a first start up when cold.You can put your hand on the radiator and feel it,or you can put your hand on the oil cooler t-stat and feel it . It goes away after 5 minutes of running. It seems to be from the oil presure system. I replaced the oil cooler t-stat noise still there.
ANY IDEAS ????????????
Terry Lucas
toyflyr@pacbell.net








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noise in oil lines (vibrating the radiator) when first started in am.noise gone in 5 minutes

posted by  someone claiming to be Ray N on  Tue Nov 26 05:13 CST 2002 [RELATED]

I think Steve is right about the air pump. You can drop the front
air damn (black palstic, two 10mm bolts on either side) to see it.
I just checked alldatadiy.com for service bulletins (I have a
subscription for my 98 T5) and it did not list any TSBs for this
pump.

Perhaps a mounting bolt is loose or it is touching something.
In any case, the pump is pretty noisy (I can hear mine when I
start the car in the garage) and it makes something of a
rattling sound when it runs.








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noise in oil lines (vibrating the radiator) when first started in am.noise gone in 5 minutes

uid 10890's pic
posted by  STEVEF on  Mon Nov 25 13:12 CST 2002
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Could it be your "air pump"(exhaust pre heater)? they are known to get a bit loud, and are in the same area(under batt tray).
--
Steve F. in Hoboken, NJ







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