I thought you could run up to ~1/2 a qt over full without issues.

I'd put my money on this being the issue....Oil coolers don't make noise, Power steering pumps do....Much like you describe, especially when low on fluid.

No....The Bypass system retains oil in the cooler. Whenever I've changed oil, I always get about a quart out of the cooler and lines...

http://images53.fotki.com/v439/photo...MG_2379-vi.jpg

Forgot about the bypass!

Modshack to the rescue.

You should be on the forum payroll, you know. :tup:

Modshack, you have a Starbucks gift card being emailed to you as soon as I figure out how to do it. You've been incredibly helpful with my whole install. If the bypass system retains the oil, then the dipstick will still be accurate.

So why would my PS pump make noise if I've bled the system? Just the added strain of pumping fluid through a 9-row cooler rather than a smooth tube with fins attached (the stock POS)? I'm hoping the last two sentences in the attached service manual clipping are the explanation. I followed the priming instructions in the service manual (turning lock to lock) and there aren't any more air bubbles coming out. It took about a quart to refill the PS system. What makes no sense is that the manual says the system takes 1 1/8 quarts and I've now added a new, somewhat larger cooler. Unless there is some retained fluid from the drain, I don't know why I only fit 1 quart. Annoying...

he said he wanted a steak house gift card for his whole family. lol. Well Im glad to hear its not an oil cooler problem as I will be doing mine here shortlly now that Im back from my training.

We can't reward Modshack too much as he's defecting, and that shouldn't be encouraged with gifts.

Functionally the coolers have been working great. It's simply the issue of a new sound after installing the oil and steering coolers. The improvement in oil temps is fantastic though. 95F ambient yesterday and my temps while sitting in traffic after a sporty highway jaunt never went over 215F.

LOL...send Money!

I like coffee....Contributions appreciated!

You guys can continue to abuse me while I'm still here.....But there are sharks circling around my car as we speak!

Try it again...Whenever I've purged PS systems I've had both wheels off the ground and cycled things left and right several times with no load on them...

what is Modshack defecting to?

Heh heh....I've had 58 cars. There are a few more on the Bucket List I need to check out before I can't drive anymore!

I can certainly do it again. However, I had the whole car on jack stands when I did it the first time. There isn't any noise when I turn the wheel lock to lock now (doesn't sound like a pissed off PS pump), and the sound is minimal when the engine is cold. As things heat up though, the throttle-related whir sound gets louder. I'm about to chalk this up to being nothing to worry about. FWIW, I'm using Redline PS fluid...anything fishy about that?

Someone just posted this article. Interesting that the R&T team heard the noise as well. Rather than being engine oil related, JB1 had an interesting theory that installing the cooler just gives an avenue to transmit engine noise that was otherwise more contained...a speaker-like effect. Who knows.

Wrap Up: 2009 Nissan 370Z Touring - Article - RoadandTrack.com
Quote:
For experimental purposes, we measured interior noise both before and after a switch to conventional oil. We found there was a noticeable gain of about six decibels at middle revs in 1st gear but no real discernible difference in maximum cabin loudness. Sans sound meter, some complained about the increase of whirring sounds at low rpm over time, which are reminiscent of radio speaker feedback from an improperly grounded audio system.

I just put my cooler on this morning and wasn't able to hear anything. Maybe the rubber buffered brackets that Setrab/Z1 put in their kits stops the vibration? Or maybe my ears are too wrecked from loud music and farm work to pick it up. :P