Goodson Bronze Wall 2 Manual De Instrucciones

Bronze Wall II; Follow these steps:
1. Thread the valve guide with self-piloting tap. This tap assures true alignment and cylindrical bore
even with extremely worn valve guides.Tip: Run a reamer, .004" oversize, through valve guide
before tapping operation.
2. Screw bronzewall bushing in the guide using the special inserting tool. This tool may be run using
the optional power driver (adaptor BW2-640). It is best to start the first few threads by hand and
then to power the bushing the rest of the way into the guide. Hold a finger over the opening at the
other end of the guide and when the nose of the installation tool is just poking through the guide,
the bushing is fully installed. With the bushing installed, remove the power driver, grasp the
knurled knob on the top of the installation tool and twist backwards smartly to break off the
installation tang.
3. Unwind the excess bronzewall bushing material away from the valve guide and trim, using the
piloted cut-off tool supplied with the kit.
4. Using the ball sizing swages, swage the bushing to the desired size. The swage may be driven
manually through the guide using a soft face hammer or it may be air powered using the optional
air driver adaptors. This completes the bronzewall installation.
Bronzewall Installation Tips:
Choosing the sizing swage: Swage size should be determined by measuring the OD of the valve
stem and adding .001"-.002". This gives a good starting point for swaging the bronzewall guides.
The valve guide will generally end up being .001" smaller than the size marked on the swage due to
spring back of the bronze material. This varies depending upon the type of cylinder head, the
starting size of the bronzewall II bushing before swaging, and the diameter of the valve guide.
Optional Installation Instructions:
For high performance or specialized applications, it is sometimes advantageous to hone the valve
guide to final size rather than swage to a final size. The normal installation instructions are followed
for tapping and bushing installation, but choose a swage that will just seat the bronzewall bushing
into the cylinder head. A swage that is either slightly under or the same size as the valve stem is
best. Then the optional valve guide hone (P-190), can be used to hone the valve guide to a
precision-finished diameter. The guide can be checked with a dial bore gauge or a small hole gauge
and an outside micrometer. Another method that is often used where a honed finish is desired, is to
swage the bronzewall bushing so that the valve has a tight "O" fit in the guide and then follow up
using a small diameter ball hone (available as an option). The ball hone performs a deburring and
surface finishing operation on the interior of the guide. The guide should be honed so that the valve
has a smooth, sliding fit. One of the advantages of the bronzewall process is that guide may be run
BRONZEWALL II
INSTRUCTIONS