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Registered
450 sl 1976
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9 Posts
Discussion Starter #1
i am trying to find air pump and bracket , i found many different but nothing feet 1976 .
1.where i can find one?
2.there is any overide connection i can make without the air pump in between ?

second, where dose the switce over valve get the electric signal?
 

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R/C107 Moderator
1986 560SL: '84 500SL: '84 280SL 5 speed: other 107s
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32,362 Posts
Do you have a US model 450? Post or PM your VIN and I will check the EPC to get the part numbers for you.
 

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Registered
1978 280slc
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3,203 Posts
I'm using one out of a buick riviera. The old style smog pump is totally mechanically controlled for how it turns on/off, I've pulled cleaned and lubed mine twice as between smogs it will rust up and seize.
 

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Premium Member
1984 380SL, 1973 450SLC
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2,174 Posts
Hello raminir, I have this 1975 SLC out in the back yard, here is a picture of the air pump, it seems to be seized, and I see no bracket. Is this something you could use??? I have some brackets that were removed by the previous owner, so if someone can get me a picture of what you need, i can see if it is still here. Let me know.
 

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R/C107 Moderator
1986 560SL: '84 500SL: '84 280SL 5 speed: other 107s
Joined
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32,362 Posts
Looks like at least part of a bracket is still attached. My 500SL had a Ford pump on it with a home made bracket. An import modification.
 

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R/C107 Moderator
1986 560SL: '84 500SL: '84 280SL 5 speed: other 107s
Joined
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32,362 Posts
Received the VIN.
Air pump number is 000 140 06 05
Bracket number is 117 142 08 40
There is quite a bit more involved in restoring this part of the system. Are you forced to do it for inspection?

And RC that is the bracket attached.
 

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Registered
450 sl 1976
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9 Posts
Discussion Starter #7
Topic: smog air pump 450 sl 1976 Reply to Thread

helo again
can i speak to you in the phone?
send your fhone number i will call you.
thanks
rami
 

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Registered
450 sl 1976
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9 Posts
Discussion Starter #8
smog air pump

last time when i went for car inspection i failed the test ,
the "co" was high and olso another parameter was above standrd (maybe "hc" more then 1000 ppm) .
i understend how to reduce the hc but i am not sure how to reduce the "hc".ther for i have decided to fix the sys.
rami
 

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R/C107 Moderator
1986 560SL: '84 500SL: '84 280SL 5 speed: other 107s
Joined
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32,362 Posts
Calling me would be a waste of time and money. I know nothing about emission controls on any car other than they work or they don't. I have a '73 with no emission stuff. An '84 500SL which was not was not made with emission stuff and an '86 which has it and if it fails it goes to the shop. No emissions testing here.
 

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Premium Member
1984 380SL, 1973 450SLC
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2,174 Posts
Hello raminir, if you think it's worth the shipping, I will pull these two items for you.
I think Scott is the one with the knowledge, maybe he will stop by this thread sometime..
If there is something else to include with these items, can someone let me know, pics would be real handy.... :)
 

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Premium Member
2010 Mercury Milan Hybrid, 1993 BMW 325i convertible
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6,077 Posts
the "co" was high and olso another parameter was above standrd (maybe "hc" more then 1000 ppm) .
HC is unburned hydrocarbons, which means your engine is running too rich. CO is carbon monoxide, which means your engine combustion is too hot. Making the mixture more lean to reduce the HC will also increase the CO, because lean running increases combustion temperature.

The air pump is supposed to circulate air through the heads, reducing combustion temperature, but it should be used in conjunction with a catalytic converter. The original cats on your car were in the engine compartment. I recommend you don't replace them there. Instead get a universal cat and put it in the exhaust system in place of the resonator. There's already heat shielding there, and that's where they put it starting in 1977. Having an air pump and a catalytic converter will reduce both the CO and the HC, and you should pass emissions without a problem.
 
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