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Volvo RWD 140-160 Forum

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VIEW    READ ONLY    PRINT   SAVE   A    A  Random B18 engine anomalies 140-160 1968 posted by  sdewolfe on  Mon Jun 29 03:29 CST 2009 Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS]     [IGNORE ALL POSTS] last visit: Sat Nov 21 06:01 CST 2009 [RELATED] POSITIVE CRANKCASE VENTILATION The B18A engine is provided with positive crankcase ventilation, see Fig. 14. This arrangement prevents crankcase gases from being released into the atmosphere. They are instead sucked into the engine through the intake manifold and take part in the combustion process. The residue is blown out through the exhaust pipe together with the other combustion residues. Between the engine crankcase and intake manifold there is a connection which consists of an oil trap (8) attached to the valve inspection cover on the right-hand side of the engine (viewed from the front), and two rubber hoses (5 and 7) between which there is a control valve (6). The rubber hose (5) is connected to a nipple (2) screwed centrally in the equalizing pipe of the intake manifold. The partial vacuum which occurs when the engine is running causes the crankcase gases combined with the fresh air to flow from the crankcase to the intake manifold. The amount of flow is regulated by the control valve. Fresh air is supplied to the crankcase through the carburettor air filter via a nipple (1), rubber hose (3) and oil filler cap (4) to the rocker arm casing, which is connected to the crankcase through the push rod holes. The oil filler cap, which is sealed, has a built-in flame trap. This flame trap, in the same way as the control valve, which also functions as a check valve, prevents flame from any backfiring in the carburettor or intake manifold from reaching the crankcase. As the fresh air supply passes through the carburettor air cleaners, impurities are prevented from getting into the engine. Where there is a medium or high degree of partial vacuum in the crankcase (intake manifold), which happens during idling and when operating under a light load, the system functions as described above. When the partial vacuum in the crankcase is less than that in the air cleaner, which occurs at full load and/or with large flow quantities, no fresh air is supplied. Instead, the flow in the connection between the rocker arm casing and the air cleaner reverses and the crankcase gases go both ways, partly through the control valve and partly through the air cleaner and carburettor to the intake manifold. In this way, the crankcase ventilation system can deal with relatively large quantities of crankcase gases without any escaping into the atmosphere. Volvo Green Book 02a Engine B18A, pg. 2-15 -- Mr. Shannon DeWolfe -- I've taken to using mister because my name misleads folks on the WWW. I am a 53 year old fat man. ;-) Mark this post as an answer to my question<- Use this feature to mark quality replies to your post. Select, copy to buffer, and paste anywhere: <a href="http://www.brickboard.com/RWD/volvo/1357153/140-160/random_b18_engine_anomalies.html">Random B18 engine anomalies</a>

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• Random B18 engine anomalies [140-160][1968]
  posted by  drj434343  on Wed Jul 29 23:04 CST 2009 > V

• Random B18 engine anomalies [140-160][1968]
  posted by  drj434343  on Thu Jul 2 15:14 CST 2009 > V
  • Random B18 engine anomalies [140-160][1968]
    posted by  RNANS  on Fri Aug 7 22:56 CST 2009 > V
  • Random B18 engine anomalies [140-160][1968]
    posted by  drj434343  on Thu Jul 2 17:31 CST 2009 > V
    • Random B18 engine anomalies [140-160][1968]
      posted by  Rhys  on Fri Jul 3 11:34 CST 2009 > V
      • Random B18 engine anomalies [140-160][1968]
        posted by  drj434343  on Fri Jul 3 12:56 CST 2009 > V
        • Random B18 engine anomalies [140-160][1968]
          posted by  Rhys  on Fri Jul 3 16:31 CST 2009 > V
          • Random B18 engine anomalies [140-160][1968]
            posted by  drj434343  on Sat Jul 4 12:42 CST 2009 > V
            • mail address [140-160][1968]
              posted by  Rhys  on Sat Jul 4 15:34 CST 2009 > V
            • You've found it, and should be saying VOILA! right about now! [140-160][1968]
              posted by  Ron Kwas  on Sat Jul 4 14:48 CST 2009 > V
              • You've found it, and should be saying VOILA! right about now! [140-160][1968]
                posted by  drj434343  on Tue Jul 7 16:57 CST 2009 > V
                • You've found it, and should be saying VOILA! right about now! [140-160][1968]
                  posted by  Kentucky  on Tue Jul 7 18:50 CST 2009 > V

• Random B18 engine anomalies [140-160][1968]
  posted by  Rhys  on Sat Jun 27 17:38 CST 2009 > V
  • Random B18 engine anomalies [140-160][1968]
    posted by  drj434343  on Sun Jun 28 22:27 CST 2009 > V
    • Random B18 engine anomalies [140-160][1968]
      posted by  Rhys  on Sun Jun 28 23:47 CST 2009 > V
    • Random B18 engine anomalies [140-160][1968]
      posted by  aaron74  on Sun Jun 28 22:57 CST 2009 > V
      • Random B18 engine anomalies [140-160][1968]
        posted by  drj434343  on Mon Jun 29 14:13 CST 2009 > V
        • Random B18 engine anomalies [140-160][1968]
          posted by  aaron74  on Mon Jun 29 17:25 CST 2009 > V
          • Random B18 engine anomalies [140-160][1968]
            posted by  drj434343  on Mon Jun 29 21:37 CST 2009 > V
            • Random B18 engine anomalies [140-160][1968]
              posted by  aaron74  on Mon Jun 29 22:27 CST 2009 > V
              • Random B18 engine anomalies [140-160][1968]
                posted by  Rhys  on Tue Jun 30 15:42 CST 2009 > V
      • Random B18 engine anomalies [140-160][1968]
        posted by  drj434343  on Sun Jun 28 23:18 CST 2009 > V
        • Random B18 engine anomalies [140-160][1968]
          posted by  aaron74  on Sun Jun 28 23:39 CST 2009 > V
          • Random B18 engine anomalies [140-160][1968]
            posted by  drj434343  on Mon Jun 29 00:03 CST 2009 > V
            • Random B18 engine anomalies [140-160][1968]
              posted by  sdewolfe  on Mon Jun 29 03:29 CST 2009 > V
              • Random B18 engine anomalies [140-160][1968]
                posted by  derek uk  on Mon Jun 29 03:52 CST 2009 > V

• Random B18 engine anomalies [140-160][1968]
  posted by  derek uk  on Sat Jun 27 05:05 CST 2009 > V
  • Random B18 engine anomalies [140-160][1968]
    posted by  drj434343  on Sat Jun 27 12:13 CST 2009 > V
    • Random B18 engine anomalies [140-160][1968]
      posted by  drj434343  on Sat Jun 27 15:23 CST 2009 > V
      • Random B18 engine anomalies [140-160][1968]
        posted by  derek uk  on Sat Jun 27 17:20 CST 2009 > V
    • Random B18 engine anomalies [140-160][1968]
      posted by  Pebee  on Sat Jun 27 15:20 CST 2009 > V
      • Random B18 engine anomalies [140-160][1968]
        posted by  drj434343  on Sat Jun 27 15:24 CST 2009 > V
        • Random B18 engine anomalies [140-160][1968]
          posted by  Pebee  on Sat Jun 27 20:42 CST 2009 > V

• Random B18 engine anomalies [140-160][1968]
  posted by  Pebee  on Fri Jun 26 19:55 CST 2009 > V

• Random B18 engine anomalies [140-160][1968]
  posted by  alschnertz ONLINE  on Fri Jun 26 18:36 CST 2009 > V
  • Random B18 engine anomalies [140-160][1968]
    posted by  drj434343  on Sat Jun 27 00:59 CST 2009 > V
    • Random B18 engine anomalies [140-160][1968]
      posted by  sdewolfe  on Sat Jun 27 04:48 CST 2009 > V
    • Random B18 engine anomalies [140-160][1968]
      posted by  alschnertz ONLINE  on Sat Jun 27 04:45 CST 2009 > V
      • Random B18 engine anomalies [140-160][1968]
        posted by  Pebee  on Sat Jun 27 10:17 CST 2009 > V

• Random B18 engine anomalies [140-160][1968]
  posted by  walrus3  on Fri Jun 26 18:10 CST 2009 > V

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