On Thursday, June 8th Johnmowog@aol.com wrote:
$
$ re:TJ's 66B smog problem:
$ I used a product by Wynn's this time in my 67, can't for the life of =
me
$ remember what it was, something like "smogcheck", and even though it =
was
$ still running closer to "my way" than "their way" it passed with flying
$ colors. oops, my spelling... _colours_!
<<stuff deleted>>
$ Cure: new diaphram (<$10), new hose piece (2") and clamps, and plumbers=
putty
$ or tape on all those bolts in the manifold. Also renew all the
$ carb/heatshield/manifold gaskets and the main manifold gasket.
$ With a good tuneup (include valve setting) and new air filters , your =
car
$ will now run wonderful, and *might* even pass the test.
$ Best of Luck, and, remember these guys come election time....
$
Thanks for the informatino "John". I didn't go in to excrutiating detail=
about
the condition of my B. . .but the engine was rebuilt (by me) about 40K =
miles
ago. Some might opine that it's due for another rebuild after that many =
miles.
. .they might be right! :)
But seriously, the carbs were rebuilt so the throttle shafts are in great=
shape. . .and everything *should* be up to spec. It does have the crankc=
ase
breather, and I have not done anything with that. . .I will check it out.
The interesting thing about the way it failed is this:
Bear with me because I'm not a chemist. . .
CA Smog checks involve two emmissions measurements. . . .CO and Hydrocarb=
ons
(dunno the symbol for it HC?) Anyway, too rich makes CO go UP, too lean =
makes
HC go up. . .so you have to find the point where it's neither too rich =
or too
lean.
But the smog machine only tests the emmisions AFTER the engine has been =
run at
above 3000 RPM for 30 seconds (simulating a real life drive). Once the =
car
returns to idle it begins to measure the emmisions. Now BEFORE you run =
the car
at 3000 RPM, the emmissions are well within range. .it's AFTERWARDS that=
the
car fails. . .so it must be running either too rich or too lean and the =
excess
emmissions are being created at speed. I've just not been able to get =
it
dialed in at that point.
You mentions "bolts" in the manifold? Where are these? I don't believe =
my
intake or exhaust manifold have any extra bolts in them that I've seen =
(of
course, it's been a while since I've spent any time under the bonnet, =
shamefully).
Thanks again for the advice, and if you remember the name of that magical=
potion please let me know.
Regards,
teej
"A gentleman does not motor about after dark"-J. Lucas
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