Re: V8 oil pump. Hash v Packard v 56J et-al

Posted by HH56 On 2011/9/15 16:26:48

If the pump isn't working, it's just one big potential leak, so your comment makes a lot of sense!


There is a balance valve in the line. It's no longer functioning in it's original purpose if it's still installed since there is only one vacuum source now but suspect the valve might not be working--if you have a windshield washer, the mechanic probably left it in to provide that vacuum connection and plugged the now extra port. If the valve were working, it should have prevented the vacuum being lost thru a bad pump and you would see no difference in operation. If you do resort to adding another vacuum source and use the old connection, then might want to check the valve operation.