Re: JPOR: air pump stuff

[Steve Friend <sfriend@xxxxxxxx>]

Mo is correct.  But, if you do not need it, I would not install it.  It
will not hurt you to run without it.  It only takes HP.  But, if you
have to pass smog, you will need it and start looking for manifolds and
air lines.  If you put the things together with Never-Sez, you will be
able to remove them at a later date.  The smog pump has a limited life,
for sure.  I replace mine every year or two, when it seizes.  Pain in
the butt, for sure.  I wish that I could run without it, but the smog
Nazis out there won't allow it.  

SF

Maurice Cox wrote:
> 
> ****************Please Remember to snip your replies***************
> 
> >I've gotten two conflicting reports on this from the FSJ list, so
> >I'm hoping you gurus can shed some light on the topic.
> >
> >I guess I'm a little confused about air pumps.  When I bought my '77
> >Wag with a 401 V8 (now being rebuilt), it had brackets for an air
> >pump, but no pump & no other equipment from the air pump setup.  I
> >now have a pump, but nothing else.
> >
> >I read the TSM & understand basically what the air pump setup was for.
> >It seems to indicate that even the 49-state engines had air pumps.  How
> >necessary is it for a good, clean-running engine?  My Wag also had
> >every single vacuum line cut & plugged, so I initially assumed the
> >missing air pump setup was just another victim of the DSPO's knife.
> >Now that I'm rebuilding the engine & have realized just how much of the
> >air pump system I'm missing, I'm wondering if it's worth the trouble to
> >try to obtain & reinstall all of it.
> >
> >This is going to be a tow rig / family cruiser, not a wheeling machine,
> >so power & clean emissions are important even though Nebraska doesn't
> >test them.
> 
> I don't consider myself a guru, but here's what I've gathered/thought
> through:
> 
> The air injection system has nothing to do with how clean the ENGINE runs,
> but does impact emmissions.  Air is injected into the exhaust stream so it
> can react with the exhaust gasses via the catalytic converter.  More air =
> more oxygen which allows for a higher CO2 / H20 content, versus CO and NO.
> 
> You can tell if you had an air injection system by looking at the exhaust
> manifolds.  If you see a total of 7 bolts/plugs on the outboard side of the
> manifolds (forget which side has 3 and which has 4) you had air injection.
> The original bolts are hollow to allow the air to get from the air manifold
> to the exaust manifold.  They're often brittle and plugged.  They also cost
> about $7 each from the dealer.
> 
> Hope this helps.
> 
> Mo
> ---------------
> Maurice Cox
> Cleveland, Ohio
> 81 CJ8  360/T19/NP205/D60s -- under construction
> 92 XJ   4.0/AX15/NP231
> 79 SJ   Just about gone
> 
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