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New Engine Noise post-Oil Cooler Install

Originally Posted by spearfish25 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

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Old 07-15-2010, 02:13 PM   #1 (permalink)
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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...
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...
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Old 07-15-2010, 02:51 PM   #2 (permalink)
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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...
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?
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