Cracked Cylinder Diagnosis: Remove the Intake Manifold

Video Transcript

"DOUG JENKINS: Hi. I'm Doug. I work with 20 great guys in St. Louis at Doug Jenkins Custom Hot Rods, and we're going to do some work for you today on Expert Village. Oh, look at the milk inside your rocker cover. Yeah, that's a--when you see this kind of milky mess inside your rocker cover, that is another indicator you got a coolant problem, that coolant mixing with the oil. So Dan is going to poke around with a pry bar here and there, push and pull on things, trying to get the seal between the intake manifold and the cylinder heads in the cylinder block to break loose. Now, he's going to be careful about this because there might be a fastener hidden that was missed the first go-around. You'll see him poking around here being real smart because it's no fun breaking stuff because you missed something. The reason that it sticks real good is because we want it to. You don't want a water leak or an air leak at the intake manifold. As part of this, he's going to try out just a putty knife in between the intake manifold and the block to see if he can break that seal loose. The silicon we got in there is a real good glue. It holds things real well. Ah, now it's loose. So Dan chose to run the putty knife here where the silicon seals to the block because that's a less important seal. You would never want to drive a tool in this joint here. No, that's the most critical seal. That's where the water and the air are both sealed off. So just off the top of my head, the first thing I see is coolant inside the motor, not where you want it to be. You should only see nice and clean oil in these passages. When we're done with the job, the first thing we're going to do is change the oil before we fire the engine, then we're going to run the engine for a little while and change the oil again."