Vacuum nipple - Mercedes-Benz Forum
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post #1 of 18 (permalink) Old 01-11-2019, 03:20 PM Thread Starter
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Vacuum nipple

Does anyone know which vacuum hose connects to the vacuum nipple on the front upper right of center on the intake manifold. This would be on a 91 560sec.

Thanks in advance.
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post #2 of 18 (permalink) Old 01-11-2019, 04:46 PM
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IIRC and if it's the one I'm thinking of that is the one supplying the air pump, if it's disabled/deleted then cap that nipple

Some days it's just not worth chewing through the restraints
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My Stable:
'91 560SEC "Ursula"
'91 300SE (sold) "Sadie"
'11 Suzuki SX4 Sport Sedan
'02 S-10 Truck
'72 SeaBird boat, "Riff Raft", overhaul restarted

Dif-tor heh smusma
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I'm surprised that NOBODY has asked me what this is / means
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LOL
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post #3 of 18 (permalink) Old 01-11-2019, 05:34 PM Thread Starter
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Wooky the air pump is supplied by the nipple on the passenger side of the intake manifold next to the fuel distributor.
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post #4 of 18 (permalink) Old 01-11-2019, 05:50 PM
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Vacuum nipple

Pull up the vac diagram you will see it. IIRC the bottom nipple on my 91
Is capped off.


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1991 560SEC 199 /268, 17" RS90'S, Eibach springs, Bilstein HD shocks, Custom rear sway bar, Euro Headlights, Custom ceramic coated headers and down pipes with stainless dual exhaust, W140 glass sunroof, dog ear trunk spoiler, OEM Skid Plate, Euro bumpers, wood refinish and restored.
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post #5 of 18 (permalink) Old 01-11-2019, 06:36 PM Thread Starter
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Quote:
Originally Posted by 281lxm View Post
Pull up the vac diagram you will see it. IIRC the bottom nipple on my 91
Is capped off.
Itís the vacuum diagram Iím after for the 91 560sec. Also Iím talking about the nipple on the front right of the intake manifold not on the throttle body.
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post #6 of 18 (permalink) Old 01-11-2019, 08:13 PM
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Post a pic


Enjoy yourself, Marco.


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post #7 of 18 (permalink) Old 01-12-2019, 11:01 AM Thread Starter
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Quote:
Originally Posted by lowphat View Post
Post a pic
Here is the pic. One with a vacuum hose attached and one with vacuum hose off.
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post #8 of 18 (permalink) Old 01-12-2019, 12:10 PM
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That line is the EZL vacuum line connection. At the other end connects to the vacuum port of the EZL
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post #9 of 18 (permalink) Old 01-12-2019, 12:21 PM Thread Starter
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Thanks for confirming that Liviu.
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post #10 of 18 (permalink) Old 01-12-2019, 12:45 PM Thread Starter
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Another question where does the lower of the two vacuum connections go to from the throttle body.
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