I have a 88 truck with the 2.4l engine. On the bottom of the intake manifold is a part that threads into the manifold and has three coolant ports on it. I called the dealer, because no parts stores around here seem to carry parts for older Nissan trucks, and was told that it is the manifold connector or another name is the bypass connector part number 1407589w00. One of the ports rusted off and I need to replace it. The dealer wants $28.93 but that is a significant percentage of what I paid for the truck so I'm looking to find it cheaper or see if I can just plug it. Can anyone help?