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Message: <blockquote data-quote="ehoe" data-source="post: 8852" data-attributes="member: 141"><p>The throttle housing for the E34 M20 engines has two little pipes which is connected to your car's cooling system (circled in RED in attached pic). My mechanic tells me that this pipping to the cooling system is optional. You can actually install the throttle housing without the need the run the coolant pipes to these two connectors. i.e bypass the pipes all together. Car will still run fine.  So just wanted to get a second opinion from all the sifu's out there. Is it true, are these cooling pipping really optional? I'm sure they were designed and put there for a reason in the first place. Anyone disconnected theirs? Well just wanted some opinions.... tks.</p></blockquote><p></p>