Originally Posted by 97ta383
I cleaned the intake manifold already took awhile but it's very clean. I was talking bout the heads. And I fixed the pcv system lol
I'd fill each runner and cylinder with SeaFoam and let it soak for a few hours. You'll have to fill whichever ones have open valves so the cylinders also fill up. Then pull those spark plugs and turn the engine over for 10-15 seconds so it can all drain out. Let them air dry after that. Then do it to the other cylinders. Then pull those plugs and drain it and let it dry out. Be careful not to hydrolock any by accident.
When I had my intake off to clean it and change my OPSU.......thats what I did. No better way to clean a top end than that without removing the heads.
Install new spark plugs while your at it.