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Subaru 2.2 Liter Engine User Manual
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Subaru 2.2 Liter Engine User Manual

2.2 liter engine
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Subaru 2.2 Li t er Engi n e
Subaru 2.2 Liter Engine
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Summary of Contents for Subaru 2.2 Liter Engine

  • Page 1 Subaru 2.2 Li t er Engi n e Subaru 2.2 Liter Engine...
  • Page 2 The End Wrench introduces the Subaru 2.2 liter naturally aspirated (N/A) and 2.2 liter turbocharged horizontally opposed overhead cam (OHC) engines. It reviews the mechanical features of these engines and the differences between I n t r o d u c t i o n existing engines.
  • Page 3 The 2.2L engine uses a compact pentroof combustion chamber versus the bath- tub design of the 1800cc/2700cc Subaru engines. It has a centrally located spark plug which provides the quickest, most efficient combustion with a uniform flame front from the plug to the top of the piston.
  • Page 4 The HLAs used in the 2.2L engine are very small in size. Compare them to the size of the 1800cc and 2700cc HLAs. One advantage of these HLAs is the reduction of reciprocating weight. The HLAs are installed in the rocker arms while the 1800cc /2700cc HLAs are installed in the cylinder head.
  • Page 5 Subaru 2. 2 Li t er Engi n e Timing Belt System A single belt is used to drive both camshafts and the water pump. This provides more precise valve timing. The cam belt width is 30mm (1.18 inches) to increase cam belt life.

  • Page 6: Engine Diagnostics

    Engine Diagnostics Note: The following diagnostics pertain to the 2.2L engine only. • Valve train noise (clacking sound). Operate the engine for approximately one hour before diagnosing HLAs as the problem. Do not rev the engine! • If the rocker shaft relief valves are plugged, the rocker shaft oil pressure will increase during low engine temperature operation.
  • Page 7 Subaru 2. 2 Li t er Engi n e Engine Accessory Removal Remove the hoses, electrical connections, sensors, switches, intake manifold, and intake manifold gaskets. Note: The rubber coated metal gaskets are one-time use only. Remove dipstick tube and then remove the water pump and rubber coated metal gasket.
  • Page 8 2.2L Component Inspection and Servicing Cylinder Head Disassembly Remove the valve rocker cover bolts and the valve rocker cover. Then remove the eight rocker shaft assembly retaining bolts and the rocker shaft assembly. Note: Remove the rocker assembly slowly to prevent binding against the mounting dowels.
  • Page 9 Subaru 2. 2 Li t er Engi n e Valvetrain Components Use valve spring remover 499718000 to remove the valve springs. Then remove the valves and seals. The intake seals are black and the exhaust seals are brown. Use valve seal installer 498857100, to install the valve guide seals (black for intake, brown for exhaust).
  • Page 10 Compressing Belt Tensioner Piston will damage the tensioner piston and it will not extend properly when it is reinstalled on the engine. Refer to the appropriate section in the Subaru service manual for tensioner handling procedures. Revised Belt Tensioner Procedure...
  • Page 11 Subaru 2. 2 Li t er Engi n e Cam Belt Installation Install the camshaft sprockets using camshaft sprocket wrench 499207100 or 499407000. Refer to the service manual for the proper specifications. The left sprocket has the cam angle reluctors and is not interchangeable with the right sprocket.
  • Page 12 2.2 Liter Engine Enhancements Beginning in the 1997 Model Year, the 2.2 liter engine for 1997 Legacy and Impreza models has had internal and external changes that yield an approximately 10% increase in power and 3% increase in fuel economy. Accomplishing this involves many factors, one of which is engine friction reduction.
  • Page 13 Subaru 2. 2 Li t er Engi n e Notes and Cautions 2.2L Engine Disassembly • There are two timing marks on both the cam pulleys and the crankshaft pulley, a notch and an arrow. Align the notch on the outer rim of each camshaft pulley with the notch on the inner cam cases.

  • Page 14: Service Bulletins

    Subaru .2. 2 Li t er Engi n e General Hand Tools & Supplies Service Bulletins Date Title Remarks General hand tools and supplies 01-106-88 2/1/88 Recommended Dial indicator Sealants and Dye penetrant Adhesives Feeler gauge 02-44-86 2/4/86 OHC Replacement...