Volvo Engine >> CYLINDER BLOCK & CRANKSHAFT CHANGES
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Volvo Engine >> CYLINDER BLOCK & CRANKSHAFT CHANGES
Cylinder Block & Crankshaft Change On
Volvo 1988 2.3L B230 Engines
Volvo Motors has changed the cylinder block and crankshaft on 1988 and later 2.3L B230 engines. The changes are related to the crankshaft main journal size and thrust location. Volvo also identifies 1988 and newer blocks by stamping K externally on the front timing case.
Crankshaft main journal diameters have increased in diameter to 2.4798-2.4803 (62.987-63.000 mm). The thrust bearing has been relocated to the rear main and uses a flanged type bearing. The thrust length on the crankshaft was also increased to a length of 1.398 (35.5 mm). Connecting rod journals remain unchanged at 1.9285-1.9293 (48.984-49.005 mm) in diameter.
Revising the crankshaft required the block main bearing bores be increased to 2.6378-2.6383 (67.000-67.013 mm) in diameter.
Years Main Journal Rod Journal Thrust Main Brg.
Used Diameter Diameter Location Housing
& Length Bore
----------------------------------------------------------------
1985-87 2.1648- 1.9285- 1.142 2.3228-
2.1654 1.9293 @ #3 2.3236
1988-92 2.4798- 1.9285- 1.398 2.6378-
2.4803 1.9293 @ #5 2.6383
The AERA Technical Committee
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