New Strange Noise

[hughwilton]

Strange noise

I agree with the oil cooler valve as being the problem. The noise is also known as the "military groan". On my truck the noise goes away when the oil is clean returns as it gets dirtier.

[luckyjoe]

Jim-ME,

From all the info you've posted - it is the relief valve at the entrance of the oil cooler:


My only question is if this is simply a whine due to the valve/set-up, or if it is directly related to oil level and/or air in the system.

Regards,

Tom P.

[Jim-ME]

I believe it is due to the setup not due to low oil level or air in the system. My oil level is between H and L on the dipstick and no where near min. I'm not sure how to bleed the cooler other than remove the sump side of the cooler. I will do that shortly to eliminate any possibility of air. Thanks for the reply.
Jim