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Head and Rocker Arm Assembly

6:54
35:02
472.5K views

At 6:54 in

Lake Speed's Forgotten NASCAR Engine is READY TO RIP! 90's Ford C3 with Modern Tech Dyno Test

What happens here

The cylinder heads, now with updated valvetrain components and ported, are installed on the engine block. The head bolts are torqued in a specific pattern to ensure even pressure and proper sealing of the head gaskets. This is done with careful attention to detail, indicating the precision required for race engine assembly. After the heads are installed, the rocker arms and their stands are assembled. The new, smaller valve springs are noted for their modern design, contributing to valve train stability. The lash is set on the solid lifters using a feeler gauge, aiming for a very specific gap (e.g., 0.020 inches) to ensure proper valve operation without excessive noise or wear. This involves careful adjustment of each rocker arm.

Goal: Assemble and properly torque cylinder heads and set valve lash.

Tools and materials

  • Cylinder Heads — Installation on the engine block
  • Dowfil 732 Silicone Sealant Dowfil — Sealing engine components
  • Feeler Gauge — Measuring and setting valve lash
  • Head Gaskets — Sealing between the block and cylinder heads
  • Rocker Arms — Part of the valve train assembly
  • Rocker Stands — Supporting the rocker arms
  • Torque Wrenches — Accurate tightening of head bolts and rocker arm fasteners

What they say

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to be. Yeah. So you do this pretty quickly. Yeah. We try. The Ford lends itself to being a uh a pretty userfriendly motor to work on. I think is that just cuz you're a Ford guy? Well, not just that. I think [laughter] I think even Chevy guys that worked on these in the day I'll tell you it's a lot less complicated than the the modern engines that we race now, you know, you have all these different fasteners in different locations. These are everything's pretty much the same. When they went to the D3 head after this, it was, you know, very similar also. So, now knowing what you know about specs that you've measured and the heads that you've flowed and the cam specs that you know for sure, now that it's all here, what is your professional prediction of what this thing is going to do on the dyno? Boy, I knew you were going to ask that question. What if I if I over overpromise and underdel? We hate that, don't we? Give us your your actual one and then give us what you would give us if you were a customer didn't want to hurt their feelings and overpromise under deliver. How about that? You get to pick two. What you really think and then what you would actually tell somebody. [laughter] What I really think, uh, I would I would, if I had a promise, I'd save it 725, but what I what I think it is, it's going to be 7:45. 7:45 is your authentic number. Yeah. No feelings attached. That's right. Okay. There's a lot to think about there. I'd also like to point out that we're having a conversation with you and you're just running through these heads like you don't even have to think about [laughter] the torque pattern. And I and I get on my guys for doing this, right? That this is not what you do, right? You just know it. How many times have you done this? Oh, a lot. And I'm capable of a lot of mistakes. Last night we were mocking this stuff up cuz I thought I had everything. And these stands right here. Uhhuh. I put the rockers that Nick Ramy we had found on it and they were along a pivot length and I had to go looking for stands. So, we had to go through the archives cuz the stands that were on this were for a shorter pivot length rocker arm. Huh. Luckily, we found them. Maybe Lake will need to refresh his other engine after this. That's right. The one that's supposedly good. Oh, does he have another one? Yeah. Okay. He has another one that was just like this sitting around. Why is this in the back of my truck right now? Okay. So, we've had so much fun with the first…

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