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Message: <blockquote data-quote="Tazza" data-source="post: 36007" data-attributes="member: 82">Its not always the way, when the oil is cold its thicker than when its warm. As you stated it runs well when cold it probably isn't only wear causing your issue. The pressure sender should be on the front of the square block, if the sender is not there anymore there will be a plug in it. Charge pressure has a lot to do with the drive circuit, if its too low it will howl and not move.Hopefully its just air that is bleeding out, but i highly doub it from what you describe its doing. Its working fine then not....To check for wear you need to remove the main pump and pull it down and inspect the rotating groups and wear plattes, there is no easy way i'm afraid.</blockquote>