Mazda engine service manual F2-2

1 ENGINE ouTLlNE ....',|- 2 OUTLINE OF CONSTRUCTION ... 1- 2 STRUCTURAL VIEW ... 1- 2 SPECIFICATIONS ....... 1- 3 INTERCHANGEABILITY............. .1- 4 CYLINDER BLOCK AND OIL PAN.............. 1- 5 CYLINDER HEAD AND COVER.......... CYLINDER HEAD GASKET 1_ 7 VALVE MECHAN|SM............ ...... 1- 8 OUTLINE ... 1: 8 CAMSHAFT AND ROCKER ARM........ 1- 9 VALVE AND VALVE RELATED PARTS......... 1_10 HYDLAULTC LASH ADJUSTER (HLA) 1-11 prsToN AND CONNECTING ROD .............. 1-13 CRANKSHAFT......... ... 1-14 TIMING BELT 1-15 86U01 X-501

OUTLINE OUTLINE OF CONSTRUCTION The New 626 is equipped with an F2 2.2liter engine. This engine is based on the previous 626 FE engine, with increased displacement. The engine features three valves per cylinder and a new timing belt layout. Main Changes: .1. The piston stroke is increased for greater displacement 2, Intake and exhaust efficiency is improved through the use of two smaller rntake valves and one larger exhaust valve per cylinder, for an increase of total valve area. 3. The timing belt layout is changed for improved durability and noise reduction. 4. A stiffener is used between the cylinder block and the oil pan to lessen noise and improve performance. R Tha nrrlinrlor hlnnft gpf crankshaft strength is improved to meet the higher power output. 6. Hydraulic lash adjusters are used to reduce noise, thus the valve clearance is made maintenance-free. STRUCTURAL VIEW 86U01 X-502 t-z

SPECIFICATIONS F2 FE Turbo Non-Turbo Turbo Non-Turbo Trrno ' J Y" Gasoline, 4-cycle Cylinder arrangement and number ln line, 4-cylinders Combustion chamber Pentroof Multispherical Valve system OHC, belt driven Displacement cc (cu in) 2,184 (133.2) 1,998 (121 .9) Bore and stroke mm (in) 86.0 x 94.0 (3.39 x 3.70) 86.0 x 86.0 (3.39 x 3.39) Compression ratio 7.8:1 8.6:1 7.8:1 8.6:1 Compression pressure kPa (kg/cm', psi)-rpm e61 (98 139) *260 1 118 (11 4 162) _270 1 078 (11 0 156) _270 1 128 (11.5 164) -270 Valve timing IN Open BTDC 100 160 Close ABDC 49" tr/1o EX Open BBDC 550 Close ATDC 120 -160 \/-t,,^ ^t^^,^^^^ v otv9 utv4t 4t tuE (warm engine) Valve side IN mm (in) 0: Maintenancejree 0.30 (0 012) EX mm (in) 0: Maintenance-free 0.30 (0 012) ldle speed rpm N/TX 750 + 25 8oo i53 ATX (in "N" range) 7qi + )q 9oo 153 lgnition timing BTDC o -t- lo 6o + 1o Firing order 1-3-4-2 86U01 X-503 t-J

INTERCHANGEABILITY The following chart shows the interchangeability of the main parts of the new F2 engine and the previous FE engine in the 626. C.....lnterchangeable X..... Not interchangeable L.....F2 engine parts can be used on FE engrne, but reverse usage impossible. Part name Interchan- geability Remark Cylinder block related Cylinder block X 1 2. 3. Strengthened cylinder block Increased block height Oil control plug added Cvlinder head Three-valve confiouration Cylinder head gasket X Redesiqned coolant and lubricant passaoes Cvlinder head cover X New desion Oil pan X Shape chanqed Vibration reducino stiffener X Newlv added between cvlinder block and oil pan Timinq belt cover X Enlaroed Front housino X Shape changed Front oil seal A Increased heat-resistance Rear oil seal C Crankshaft rol2ia.i Crankshaft 1. 2. Increased crank pin offset for longer stroke Increased counter weicht width Main bearing Oil hole elliminated Connecting rod and cap X 1. 2. 3. Increased length Strengthened cap Increased bolt size Crank pin bearinq o Piston X 1, 2. Redesigned valve recess Land width increased Piston pin C Piston rino A Increased reliabilitv F vwneel Increased rnertia weioht Timing belt .^l^+^l IEI4LgU T mino belt X New design 1. Changed trm ng belt layoul 2. Increased timing belt width Q lrllor nr rllarr lrirlod vv,,v y qvvvv Timinq belt pullev mino belt tensioner Camshaft pullev Valve related iamshaft New design 1. Changed to three valve layout 2 HLA used at rocker arm 3. Changed rocker arm shaft mounting Rocker arm Rocker arm shafl Valve Valve sorino and seat Valve quide Valve seal Lubrication .^l^+^A I claLgu Oil pump X 1. Changed body shope 2. Changed to trochoid gear type 3. lncreased oear width Oil strainer X Shape changed Oil filter C Cooling related Water pump X 1. Changed body shape 2. Changed from two piece shaft and seal to one olece seal Thermostat o 86U01 X-504 1A t-?

CYLINDER BLOCK AND OIL PAN 86U01 X-505 '1. The rigidity of the cylinder block is increased to reduce engine vibration. o Width of the strengthening ribs on the cylinder block is increased. . Ribs around the crankshaft journals are rernforced or added for extra strength. 2. Instead of an oil orifrce in the cylinder head gasket, an oil control plug is installed in the cylinder block for improved sealing, This controls oil flow to the valve mechanlsm. 3. A vibration reducrng stiffener is secured between the cylinder block and oil pan, reinforcing the block. To prevent oil leakage when servicing, sealant must be applied to both sides of the stiffener. \ \\ Seal V E/ "/R J\ Sealant ant Vibration reducing stiffener wt I-U

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Mazda engine service manual F2-2

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