Hyundai Engine >> REVISED CRANKSHAFT DESIGN ON 1.8 & 2.0L HYUNDAI
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Hyundai Engine >> REVISED CRANKSHAFT DESIGN ON 1.8 & 2.0L HYUNDAI
Revised Crankshaft Design For
1996-2000 Hyundai 1.8 & 2.0L Engines
The AERA Technical Committee offers the following information on 1996-2000 Hyundai 1.8 & 2.0L engines. Several other components including the flexplate/flywheel required changes to accommodate the new crankshaft designs. These engines are used in the Elantra and Tiburon car models.
The new crankshafts, Part #23110-23710 for the 2.0L and Part #23110-23510 for the 1.8L, were released July 8, 1999 and have the following dimensional changes as illustrated in Figure 1.
A. The flywheel mounting flange (pilot) diameter has been reduced from 1.614(41 mm) to 1.3780 (35 mm).
B. The flywheel mounting flange (pilot) height has been increased from .1575 (4 mm) to .2560 (6.5 mm).
C. The crankshaft rear flange thickness has been reduced from .8071 (20.5 mm) to .7087(18 mm).
D. The crankshaft rear flange bolt hole depth has been reduced from .5315-.6496 (13.5-16.5 mm) to .4528-.5512 (11.5 mm -14 mm).
NOTE: The new crankshafts are not interchangeable with the previous ones. However, a crankshaft spacer (Part #23112-23900) can be attached to the new crankshafts to make them interchangeable with the older crankshafts.
The flywheel and flex plate assemblies have also been changed to fit the new crankshaft. The new flywheel and flex plate assemblies are not backward compatible with the older crankshaft. However, the older flywheel and flex plate can be made interchangeable by mounting a crankshaft spacer (Part #23112-23900) onto the new style crankshaft.
· The flywheel and flex plate assembly pilot bore diameter has been reduced from 1.6142 (41 mm) to 1.3780 (35 mm).
· The flywheel pilot bore depth has been increased from .1969 (5.0 mm) to .2953 (7.5 mm).
Each crankshaft and flywheel / flexplate combination necessitates that specific mounting bolts to the crankshaft are used. Tables 1 and 2 identify the different combinations for manual and automatic transaxles.
The AERA Technical Committee
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