I had more or less figured out my timing issues on the '67 bus...Until
my idiot guide showed up and put me onto the idea that my engine just
plain isn't from a '67 bus and may well require different timing than
the 7.5º BTDC that I had set. The engine number is AD 219114 which as
far as I can tell from extensive google searching is a generic
"replacement 1600 engine for a bus" but tells me nothing about the year
or the proper timing for it. Anyone have any clues?
Yup. So many people have had their fingers in these engines and replaced
parts with non-original 'seemingly' identical parts (or sometimes not
even close), that don't really belong.
Tune according to the distributor. Hope the carb matches the dizzy too
so you get the correct vacuum signal.
doesn't matter if it is original or not....as Jan said so many
opportunities to have been changed, therefore(as Jim stated) you time the
engine based on the distributor(and it's properties) that is being used....
different distributors have different advance totals/etc.
Totally agree. Had no end of grief with timing set to 7.5deg BTDC even
though that is what factory specs are.
Eventually I twigged Dist was not original. I kept on retarding ignition
till the pinging stopped, no more problems. That happens to be a few degrees
after TDC in my case but it runs very sweetly.
Same answer as for the engine :-)
In fact, new Universal Replacement Crankcase(s) sold by Volkswagen
came without any serial number at all. Good mechanics would rebuilt
the engine around the new crankcase then stamp the old serial number &
prefix into the new crankcase and add an asterisk to show it had been
rebuilt. But in rebuilding the engine they would be very careful to
ensure they produced an EXACT copy of the original.
But when you add forty years and heaven knows how many less than good
mechanics to the mix, the serial number becomes meaningless.
If there is any trick to keeping these antiques running it is to have
a good knowledge of their fundamentals, such as WHY the engine even
needs to advance the spark... and why that advance curve is different
for vehicles of different weight & gearing. By going back to the
basics you are able to do whatever is necessary to allow you assemble
ANY combination of engine, distributor & carburetor into a reliable,
responsive, smooth-running power-plant.
Don't give up on it. Use that tool-box between your ears :-)
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