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kevin_fisher2.0 kevin_fisher2.0 is offline
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Join Date: May 2009
Location: Alpharetta, GA
Posts: 175
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Questions: Intake Port Carbon Deposit

A few quick questions for the forum. Currently the engine in my 1969 911T 2.0 is out for a new clutch, carb rebuild and oil leak fixes.

- After removing the carbs/intake manifolds, I inspected the intake ports. Numbers 2-6 look clean as a whistle while port #1 has a consistent, thin layer of carbonization. Is it a burnt valve, bad seat, bad guide? Recommended next steps? Can this be identified without significant engine disassembly? I checked and all valves are properly adjusted (0.004 in.)
- Fuel line replating; the plating (zinc, cad?) from the metal line that supplies both carbs has worn off; is it OK for the new plating to cover the inside diameter as well as the outside diameter or do I need to block this off with some fittings during the plating process?
- Points; my Marelli distributor still has points and the engine is equipped with a PermaTune ignition box; should I take the next step and install a Pertronix electronic ignition kit on the distributor?
- Ignition coil refresh; OK to mask the top and repaint the coil housing? Alternatively, can coils be powder coated?
- Intake manifolds; what material are these black painted items? Can these be bead blasted and powder coated? Or should they be paint stripped and resprayed using rattle can?

Here's a 'progress' image.
Old 05-09-2011, 02:33 PM
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