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A GM Chevy GEO tracker is Suzuki Vitara. not told by you he problem or where it he drive-train or brake system ???? please name a problem. no engine told. my guess v6. H25 , nor transmissions. 1.6 L L01 I4 (G16B Suzuki actual) 2.0 L J20A I4 130 hp 2.5 L H25A V6 155 hp the word Orifice is mostly told in the contexts of these subjects below. 1: engine head, orifice to limit cam gallery feed oil to cam. 2: AC air conditioning HVAC expansion valve ,as a spray orifice inside. 3: brake ABS modulators. 4: A/T automatic transmission has many. (vast) 5: fuel injectors are kind of modulated ORIFICE 6: crankshaft gallery feed orifices. surely more can be found, but no clue me the problem.
I have the full set of manuals and endless data on some like G16 engines. just ask, and all 3 + transmissions.
I can't answer your question - I am the worst auto trans expert ever but early autos did have a vacuum unit and a connection to the engine intake and I suppose under certain conditions, if the diaphragm failed, which they did sometimes (mostly on carburettered engines), some fluid could be pulled into the engine intake though in more than 40 years as a repairer I have never heard of it.
As electronic engine management became more common, electronic control began to be integrated into the automatic transmissions so they could "talk" to each other and as these systems became more sophisticated there was less need for a vacuum line (or any other mechanical connection).
bad shift solenoid in transmission ,and white smoke is because you need head gasket,it is broken and you are mixing fuel with coolant,that will cause bad cat converter soon,and your engine will die soon due oil and water mix ,will kill your crank shaft and cam shaft bearing,(check your oil see if it look like milk shake,that is very bad)
i have done a few timing chains, you should go get a manual so you can go back and reference when you need to. I can tell you this "do not" move the cam or crank when the belt or chain is off. Hope it helps
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