Cracked Cylinder Diagnosis: Finding the Cracks

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. The head is loose so he's going to pull it off and it's going to make a big puddle on the floor. So doing what he can, move the coolant pan over to try to trap as much of it as possible so we don't have to--get too much with the mop bucket. Now you can see there's coolant everywhere. DAN: And there shouldn't be any. DOUG JENKINS: What a mess? There should be no coolant. No. At this point, you should see a little bit of coolant in some of these holes, but you shouldn't see it in the cylinders like that. And you can see that the cylinder that we suspect is the problem. And the first thing I noticed here, these three are black. This one is all clean. The water makes it so that you're not getting the right combustion there and you're not going to end up with the carbon deposits. And, Dan, what do you think? Most likely the water in these other holes is just spilling over when you pulled the head loose? DAN: Yeah, that was just from taking it and so it pooled. DOUG JENKINS: Yeah. And I see a big crack. You can see there's a crack right here along my finger. And I think if we rotate it along, you get the piston down further then maybe we will see more.

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