Repair ls6 intake? PIC INSIDE
Trending Topics
The Best V8 Stories One Small Block at Time
Here's some info on plastic welding.
http://en.wikipedia.org/wiki/Plastic_welding
After reading a little more about welding Zytel, that may not be a viable option. The average do it yourselfer isn't going to be able to do it properly, and the cost of having it professionally done, would probably not be worth the expense. Obvoiusly, it can be done, as is evideced by the fact that one vendor sells LS6 intakes with 90mm TB snouts welded on in place of the stock diameter snout.
More than you will ever want to know about plastic welding here.
http://labinfo.cefetrs.edu.br/profes...PRINCIPLES.pdf
"b) Effect of Moisture on Zytel®
Nylon resins absorb somewhat more moisture from
the air after molding than most other plastics. When
released from joint surfaces during welding, moisture
causes poor weld quality. For best results, parts of
Zytel® should either be ultrasonically welded immediately
after molding or kept in a dry-as-molded condition
prior to welding. Exposure of 1 or 2 days to 50%
relative humidity at 23°C is sufficient to degrade weld
quality by 50% or more as shown in Figure 11.60.
Welding parts at longer than normal weld times may
offset this loss of weld quality, but often at the expense
of heavy weld flash and marring under the
welding horn. As was shown in Figure 11.42, the part
temperature near the horn approaches that at the joint
during welding, and therefore lengthening weld cycles
may cause severe problems.
Parts may be kept dry for periods up to several weeks
by sealing them in polyethylene bags immediately
after molding. For longer periods, greater protective
measures must be taken such as the use of jars, cans,
or heat sealable moisture barrier bags. Parts which
have absorbed moisture may be dried prior to welding
in a drying oven. Procedures for this are described in
Zytel® design and molding manuals."
Last edited by Greg_E; Jan 20, 2008 at 08:42 PM.




