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 Can you briefly
explain the process?
 Prior to the preheating,
the area to be welded is ground out and specially prepared. Once the
casting has reached the desired temperature, it is maintained at that
temperature during the welding process. Using a gas fusion process, a
specially trained welder begins melting and flowing cast iron or brazing
rod into the area to be repaired. At the same time, the welder is
melting the parent metal so that the two metals flow together and
integrally bond to each other.
Is it a complicated
process?
Such welding requires a
great deal of expertise in recognizing color changes, and the welder
must know how to control the heat emitted from various areas of the
torch flame. Such expertise comes only after years of training and
practice under the supervision of a master welder.
Do you remachine your blocks?
The cylinder block is
then cooled at a very slow and controled rate. The heating and cooling
processes remove the built-in stresses that occurred when the block was
originally cast at the foundry. This relaxation of stresses causes
distortion in the cylinder block. For this reason, every block we weld
we also completely remachine.
Are the block surfaces
milled?
All cylinder block
surfaces are milled and the counterbores are recut to factory
specifications. Cylinders are all bored to the next oversize and liners
are hone fitted. The main journal caps are checked for tightness and
replaced if loose. New style stabilizers are installed and the block is
realign bored. Balance shaft and cam shaft journals are checked for
correct sizes and alignment.
Will you explain your
quality control process?
These cylinder blocks are
thoroughly tested, cleaned and inspected before leaving our shop. They
come back to you looking new and will perform as well as new blocks. The
methods we use allow us to salvage about 75% of damaged cylinder blocks.
Please contact us with any questions or comments regarding
your block requirements.
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