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Old 02-19-2002, 05:39 PM
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Need to ident. a part

Im trying to find out what this part is and what it does.
The car is a 1975 450 sl
This piece is mounted on the intake manifold next to the cold start valve.
It is a Bosch 0 280 140 017.
Looks to be some sort of a thermostat .What is it
What does it do, and how do i know if it works
Is their any way to test it?????
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Old 02-19-2002, 05:57 PM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
That is the warm-up auxiliary air valve! Supposed to raise the idle speed when the engine is cold.
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Old 02-19-2002, 06:56 PM
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Re: part id


Thank you

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