Helicoil insert for a stripped spark plug hole: Difference between revisions

Line 56:

[[image:CYLINDER HEAD.png|100px]]

The tower completes the plug cavity from the head to the valve cover. It's a part of the exhaust cam bearing. The two cam bearing bolts hold the bearing ~~wit~~ the tower to the head. There is an o-ring between the tower and the head, but it should be ok to reuse.

The tower completes the plug cavity from the head to the valve cover. It's a part of the exhaust cam bearing. The two cam bearing bolts hold the bearing with the tower to the head. There is an o-ring between the tower and the head, but it should be ok to reuse.

Because the tap has an extension on it that threads into the existing threads, the cylinder needs to be as close to bottom dead center as you can get it. When you're positioning the piston for the cylinder you're working on, turn the engine over until the intake valve rocker arm will just wiggle a little. That way both valves will be closed, but the piston will be well down in the bore, so it won't cause any interference with the Helicoil tap. Since the thread tap is a three-part tool (guide, reamer, and thread tap) there will be a good bit of it sticking down in the bore, and you don't want it running into anything.

@@ Line 56: / Line 56: @@
 [[image:CYLINDER HEAD.png|100px]]
-The tower completes the plug cavity from the head to the valve cover. It's a part of the exhaust cam bearing. The two cam bearing bolts hold the bearing wit the tower to the head. There is an o-ring between the tower and the head, but it should be ok to reuse.
+The tower completes the plug cavity from the head to the valve cover. It's a part of the exhaust cam bearing. The two cam bearing bolts hold the bearing with the tower to the head. There is an o-ring between the tower and the head, but it should be ok to reuse.
 Because the tap has an extension on it that threads into the existing threads, the cylinder needs to be as close to bottom dead center as you can get it. When you're positioning the piston for the cylinder you're working on, turn the engine over until the intake valve rocker arm will just wiggle a little. That way both valves will be closed, but the piston will be well down in the bore, so it won't cause any interference with the Helicoil tap. Since the thread tap is a three-part tool (guide, reamer, and thread tap) there will be a good bit of it sticking down in the bore, and you don't want it running into anything.