We have the engine in the stand and are going to go through it to do a rebuild. Here are the pictures of the engine before we start.
The first order of business is removing the head. First, remove the six (6) bolts holding the valve cover on..
Now that the valve gear is exposed, I can remove the rocker arms from the head.
Remove the bolt on one side and then tap the rocker shaft until the spindle is exposed on the other side of the shaft.. When removing the rocker arm shaft, there are springs and washers on the shaft, so take note of the order of these as you remove the shaft from the rocker arms. Also, mark your rocker arms and shafts "Intake" and "Exhaust" so you can easily put them back where they belong when you reassemble the head.
Now I can remove the rocker arms and the push rods. Note that the push rod lengths are different for the exhaust valve rods and the intake valve rods.
The four head bolts next to the valve stems are removed next. You can see them in the picture above. There are also two nuts beside each spark plug that are removed. When these are removed, you can use a wood block with a hammer or a rubber mallet to tap the head to shear it from the head gasket and then the head comes off.
With the head off, you see the tops of the pistons and the copper head gasket. And, turning it upside down, the valve faces.
Next, I'll post a blog about removing the cylinders from the block and the pistons from the connecting rods.
Welcome to our page of blogs for the Do-it-Yourself (DIY) owner of vintage Triumph, BSA and Norton bikes. As we get projects in the shop, we will choose some and show you how we do the work. If you want to work on your bike yourself, then this material can give you a good idea of what's involved. Although we can't provide individual consultation about your project, feel free to post comments and questions on these blog posts.