Thermostat Housing
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Honda-Tech Member
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Thermostat Housing
I have an 87 Prelude 2.0 Si.
Does anyone know what that 2 port vacuum thing is that's screwed into the thermostat housing? and it's function? is it necessary? it sits below the bleed bolt.
Does anyone know what that 2 port vacuum thing is that's screwed into the thermostat housing? and it's function? is it necessary? it sits below the bleed bolt.
Honda-Tech Member
Joined: Jan 2008
Posts: 322
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From: Union Grove, Alabama, USA
Re: Thermostat Housing
i havent messed with a older lude with a 2.0 but that is probably a ported vacuum switch. It opens up once the engine gets up to temp. Ususally they control egr. or some other emmissions junk.
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