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Tuning the 1.9 Liter Opel engine, is a “Deductive” process In general, once you acquire an older Opel, it’s a good idea to install all new common-use components, as it’s frequently easier to just replace them, than to try to sort out all the multiple potential causes of symptoms of individual part malfunctions. Generally, this means: Ignition: Distributor Cap & Rotor, Ignition Points, Condenser (correct type), Spark Plugs, Ignition Wires Fuel: Fuel Filter, Carburetor Air Filter, Fuel Hoses, Carburetor Gaskets, Fuel Pump Spacer Plate/Gaskets Cooling: Fan Belt, Radiator Hoses, Heater Hoses, Thermostat (decide heat range), Water Pump (if worn) Engine: Oil, Oil Filter, Valve Cover Hoses, Valve Cover Screens, Motor Mounts (if needed) Other: Vacuum Hoses (including Brake Booster Hose), and consider re- installing carburetor and distributor Keep a record of dates and odometer mileage reading when installing, to determine component wear rates. Procedure: Acquire an engine compression gauge (screw-end type is recommended)., Make sure battery is fully charged. Remove all 4 spark plugs & disconnect coil (+) wire. Important: Remove air filter or hardware from top of carburetor, and use a tool to hold the main throttle plates of the carburetor fully open for the duration of this test. Screw the engine compression gauge, into spark-plug holes, beginning with #1 cylinder. Observe the highest number the gauge reads (the needle jerks upward about 4 times, then levels off), and write it down as the “dry” number for that engine cylinder. Additional Diagnosis : If the reading on any cylinder is in the 40psi-80psi range, perform additional “leak-down” test to learn if a valve is worn-out, sticking, or damaged. Place the car in neutral gear (or “Park”) with parking brake engaged. Head has A plug, on the cylinder head casting “spine,” between #3 intake and exhaust valves. Inspection & Adjustment of Solid Lifters. On solid-lifter heads, a good idea is to also replace the 8 rocker nuts (and studs if needed), to assure they hold a consistent gap setting. If camshaft has been removed, always re-install the camshaft prior to re-installing the solid lifters.
Tags : radiator hoses, vacuum hoses, opel engine, heater hoses, compression gauge, fuel hoses, plug holes, leak down test, heat range, coil wire, fan belt, exhaust valves, engine cylinder, range water, brake booster
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