Alfa Romeo 33 owners manual page 25

text version of content this owner's manual page from owners manual to the vehicle Alfa Romeo 33, year of production 1983 - 1995:

COMPLETE CAR or between cylinder liners and CHECKING CYLINDER COMPRESSION pistons. REPLACING AIR CLEANER When diagnostic poor engine perfor- CARTRIDGE mance because power is not up to normal, it is advisable to test cylinder I. Unfasten air cleaner cover retain- compression using relevant tester ing spring clips 0. (MOTOMETER) and according to 2. Lift cover0 and remove following procedure: cartridge. 1. Start rhe engine and warm it up 3. Thoroughly clean cartridge by to normal running temperature. blowing low pressure compressed air 2. Remove spark plugs. from within. 3. Disconnect distributor’s high If necessary, replace cartridge. voltage cable. 4. Apply compression tester onto the seat of one spark plug. 1 Tester 3 Filler cap 2 Union 5. _ Crank the engine briefly keeping 1 Cover the accelerator pedal fully pressed so Cooling system pressure test 2 Air cleaner cover retaining spring clip that carburetor throttle valve is fully open. 1. Remove expansion reservoir cap. 6. Verify that compression pressure 2. Tighten tester onto expansion reservoir filler. is above min. value (make sure there are no leaks from tester’s union). 3. Apply pressure to the cooling system and check tester to make sure Min. compression pressure IGNITION AND FUEL that pressure remains within spec- ified value. 1030 kPa (IO.3 bar; SYSTEM 10.5 kg/cm2 ; 149.34p.s.i.1 Cooling system testing pressure: CHECKING AND REPLACING 107.9 kPa (I.08 bar; 7. Repeat the test to check com- SPARK PLUGS 1.1 kg/cm’; 15.65p.s.i.1 pression in other cylinders, being careful to reset the tester each 1. Disconnect spark plug wires with time. Compare the readings and relevant protecting boots. make sure that max. difference 2. Remove spark plugs with spark between the various cylinder pressure measurements does not exceed speci-plug wrench. fied value. 3. Clean electrodes and check insu- lation for cracks and chips. If electrodes are excessively worn, Max. compression difference between cylinders replace the spark plugs. 98 kPa (0.98 bar; Spark plug type: LODGE 25HL 1 kg/cm’; 14.22p.s.i.1 4. When replacing spark plugs, coat plug thread with specifiedgrease and then fit them in relevant seat tighten- If picked up values are not within ing them according to specified specified ones, look for the trouble’s torque. cause in poor tightness of the valves May 1983 00-28

owners manual Alfa Romeo 33

owners manual Alfa Romeo 33 - year of production: 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995 - Alfa Romeo 33 owners manual EN