Took my plenum off 3-4 weeks ago in order to switch from old style to new style injectors. Took the plenum off again last week due to a bad oil leak on the rear of the passanger side intake valve cover. When i took the plenum off i saw that the plenum did not seal to the lower plenum and the air was escaping from the last 3 runners. How can i make sure that the plenum is on all the way when i reinstall this time. I dont want to strip anything with the mani being out of aluminum.