See post #5. Use those gaskets if you need to switch gaskets. I agree to retorque the intake bolts and it should go away. If the heads of your bolts take a 1/2 inch wrench, you can only tighten them to 210 inch pounds. They look like 3/8 in bolts with a 9/16 wrench head and should be tightened to 30 foot pounds. Just check to be sure.