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Discussion Starter · #1 ·
I install a mishimoto oil cooler kit on '16 BK2 3.8 v6. Upon first start, there is a loud whining sound which keeps cadence with rpms. I replaced the power steering pump with a new one and the noise persists. I've checked the idler pulleys and they don't seem worn or sticky. Let me know any ideas on the cause.

Secondly, I noticed the outside temperature reading now soars to 138 degrees F on highway. Can someone tell me where the outside air temp sensor is located?. Maybe it's near the oil cooler which it in front of the radiator.

Any suggestions will be appreciated.
 

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The air sensor(s) is mounted on the center cross brace in front of the condenser.

Maybe the oil cooler is draining down after engine is shut off? Does it take any longer for the oil light to go out when you first start?
 

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Discussion Starter · #3 ·
Thanks. Maybe I need to relocate the sensor. Re: the oil cooler, I've noticed no change in oil light behavior and oil temp is lower (which is why I went to trouble to install it.)
May the howling noise is air in the PW steering lines? I'm using the bleeding method of turning the front wheels lock to lock several times with reservoir cap off and engine running. Does any one know a better way to bleed steering system?
 

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I've drained and fill the PS system quite a few times and only did just that. Never had any noise or bleeding issues.

Maybe one of the hard lines is damaged. They are soft aluminum.
 

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Thanks. Maybe I need to relocate the sensor. Re: the oil cooler, I've noticed no change in oil light behavior and oil temp is lower (which is why I went to trouble to install it.)
May the howling noise is air in the PW steering lines? I'm using the bleeding method of turning the front wheels lock to lock several times with reservoir cap off and engine running. Does any one know a better way to bleed steering system?
What power steering fluid did you use?

Had this happen on a acura I was working on....... reason why I asked.
 

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Discussion Starter · #8 ·
There was no whining before. The only reason the PS system was affected by the oil cooler is the PS return tube on BK2 interferes with the oil cooler lines. There's too little clearance between the tube and the cooler lines as they pass over the subframe.I had to re-route the PS return tube which meant having to bleed the PS system. That's when the humming started.
 

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2014 Hoondai 🏎️💨 GC 2.0T FBO+SFR
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Are you able to take off the sandwich plate on the oil cooler and put a filter and see if noise persits?
That way you either go oil cooler diag or power steering diag.
 
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