Engine - Parts Changes

Group:
ENGINE MECHANICAL

Number:
99-20-004

Date:
DECEMBER, 1999

Model:
1996 - 2000 ELANTRA/TIBURON

Subject:
1996 - 2000 1.8L AND 2.OL ELANTRA/TIBURON ENGINE PARTS CHANGES

DESCRIPTION:

Several component changes have been made that apply to the 1.8L and 2.OL engines used in the 1996 - 2000 Elantra and Tiburon. These changes involve the following parts:





A. Crankshaft

B. Flywheel and Flex Plate and Mounting Parts

SERVICE INFORMATION:

CRANKSHAFT

The new crankshafts (P/N 23110-23710 for the 2.OL); P/N 23110-23510 for the 1.8L) released July 8, 1999 have the following dimensional changes.

A. The flywheel mounting flange (pilot) diameter has been reduced from 41 mm to 35 mm.

B. The flywheel mounting flange (pilot) height has been increased from 4 mm to 6.5 mm.

C. The crankshaft rear flange thickness has been reduced from 20.5 mm to 18 mm.

D. The crankshaft rear flange bolt hole depth has been reduced from 15 mm (± 1.5 mm) to 12.5 mm (± 1.5 mm).





NOTE:
The new crankshafts are not interchangeable with the previous ones. However, a crankshaft spacer (P/N 23112-23900) can be attached to the new crankshafts to make them interchangeable with the older crankshafts.

FLYWHEEL AND FLEX PLATE

The flywheel and flex plate assemblies have 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 (P/N 23112-23900) onto the new style crankshaft.

A. The flywheel and flex plate assembly pilot bore diameter has been reduced from 41 mm to 35 mm.





B. The flywheel pilot bore depth has been increased from 5.0 mm to 7.5 mm. Dimension B is recessed.


MOUNTING HARDWARE: FLYWHEEL AND FLEXPLATE








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.

NOTE:
Crankshaft PIN 23110-23710 for the 2.OL is part of Short Block
Sub-Assembly P/N 21102-23C01. Also, crankshaft P/N 23110-23510
for the 1 .8L is part of Short Block Sub-Assembly P/N 21102-23B01.
These short blocks also require the use of Tables 1 and 2.

INTERCHANGEABILITY: SEE BELOW

Old to New= NO
New to Old = Only with spacer/adapter! See tables for details.