Date: Fri, 29 Jun 2012 23:41:19 -0400
Reply-To: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject: Re: Tips on passing emissions
In-Reply-To: <4FEE5D67.5090004@turbovans.com>
Content-Type: text/plain; charset="us-ascii"
The scraper seal part number is 113109619. For some reason ETKA does not
show it on the waterboxer or type 4 engines but they were originally there.
The new AMC heads now also have them. They tend to get brittle and break off
and disappear in the oil. The pieces will usually come out with an oil
change .
If you over advance the ignition timing the usual response is to lower the
idle speed by closing the throttle bypass or the throttle plate itself. If
you do this while connected to an exhaust gas analyzer you will reach a
point where both CO and HC will rise and the O2 sensor can only do so much.
Dennis
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Scott Daniel - Turbovans
Sent: Friday, June 29, 2012 9:59 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Tips on passing emissions
I don't think I've seen intake valve seals on any waterboxer head I ever
took apart.
There are a lot of vanagon waterboxer engines not running perfectly. I think
that's fairly safe to say.
They sure do 'keep going' though, even if not really right, gotta love that
about 'em.
"overly advanced timing causes the throttle to be too far closed"
........??
howdi-ya figger ?
Maybe that means either of the two screws that affect idle are used to keep
rpm down to where it belongs at idle, since the too advanced timing is
conspiring to create a too fast idle.
" throttle too far closed" just by itself ...don't get that either,
unless somebody messes with a stop screw perhaps.
On 6/29/2012 1:51 PM, Dennis Haynes wrote:
> So for all those years you had one or more of the following:
> Ignition miss fire
> Lean miss fire due to bad injector(s), vacuum leak, cylinder air flow
> unbalance due to cylinder, rings, or valve problem.
> Valve problem-exhaust.
> Oil carry over from overfilling, worn guides, or intake valve stem
> seals missing.
> Improperly adjusted ignition timing, (over advanced)causing throttle
> to be too far closed, insufficient air for combustion, mixing at idle
speed.
>
> In addition the catalyst was not doing its job.
>
> Dennis
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On
> Behalf Of Stuart MacMillan
> Sent: Friday, June 29, 2012 12:05 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Tips on passing emissions
>
> At least they worked 10 years ago. As I mentioned in an earlier post
> I used to have to go to a test site where a guy with a Sun three gas
> tester charged
> $35 to guarantee you passed. No matter how much tuning I did, and I
> would even set the mixture screw to get the proper voltage at the O2
> sensor, I always failed on HC, and he did two things. First he
> cranked up the idle to the maximum the test facility allowed, which
> was 1150 rpm. The second, and most important, is that he was able to
> talk the tester out of using the funnel they were supposed to stick on
> the wand for short tailpipes like the Vanagon's. I think that had the
> most to do with it because without it there was more air dilution of
> the exhaust gasses. That stupid funnel kept the gasses in the
> tailpipe longer, and I didn't think it was fair. They didn't listen to me
though.
>
>
>
> These were the days before we had dynamometer testing, so YRMV.
> Syncros are not dyno tested though for obvious reasons.
>
>
>
> Good luck!
>
>
>
> Stuart
>
> Exempt '85 Westy
>
> Seattle
>
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