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Enginetech Inc
For Techincal Assistance Call:
1-800-410-3664 ext 340 or ext 237
TECHNICAL BULLETINModel: CELICA
Liter: 1.6L
V I N: 4AFE
Year: 88-97
January 1993
Mfg: TOYOTA
TB 971
Camshaft Timing On Toyota 1.6L DOHC 4AF and 4AFE Engines
Timing the camshafts on 1.6L DOHC Toyota engines can be a source of frustration. This popular DOHC, 16 valve engine is used in the Corolla, Prizm and Celica vehicles.
The cause of the frustration is two sets of timing marks on each of the integral camshaft gears (Figure 1). Each set of marks has a particular purpose. One set is used to time the intake with the exhaust camshaft when they are mounted to the cylinder head. The other set indicates the TDC (Top Dead Center) for bothcamshafts.
Mount the camshafts to the cylinder head using the following steps:
1) Install the exhaust camshaft and torque the bearing caps in sequence to 108 in.lbs. (Figure 2).2) Rotate the exhaust camshaft to position the knock pin slightly past 9 o'clock (Figure 3).3) Mount the intake camshaft, aligning the installation timing marks and torque the bearing caps in sequence to 108 in.lbs.4) Rotate the camshafts to ensure alignment of the timing marks. 5) Finish by aligning the TDC timing marks (Figure 1).
The cylinder head is ready for installation on the cylinder block. Align the crankshaft and camshaft sprockets before positioning the timing belt (Figure 4). Aligning the through hole in the camshaft sprocket with the mark on the camshaftbearing cap is the only tricky part.
The AERA Technical Committee
Page 1 of 5
Reference:
This information is provided from the best available sources. However, AERA does not assume responsibility for data accuracy or consequences of its application. Members and others are not authorized to reproduce or distribute this material in any form, or issue it to their branches, divisions, or subsidiaries, etc. at a different location, without written permission.© Copyright AERA 2006
TECHNICAL BULLETINModel: CELICA
Liter: 1.6L
V I N: 4AFE
Year: 88-97
January 1993
Mfg: TOYOTA
TB 971
Bulletin Diagram: Untitled Graphic #1912 for TB 00971
Page 2 of 5
Reference:
This information is provided from the best available sources. However, AERA does not assume responsibility for data accuracy or consequences of its application. Members and others are not authorized to reproduce or distribute this material in any form, or issue it to their branches, divisions, or subsidiaries, etc. at a different location, without written permission.© Copyright AERA 2006
TECHNICAL BULLETINModel: CELICA
Liter: 1.6L
V I N: 4AFE
Year: 88-97
January 1993
Mfg: TOYOTA
TB 971
Bulletin Diagram: Untitled Graphic #1913 for TB 00971
Page 3 of 5
Reference:
This information is provided from the best available sources. However, AERA does not assume responsibility for data accuracy or consequences of its application. Members and others are not authorized to reproduce or distribute this material in any form, or issue it to their branches, divisions, or subsidiaries, etc. at a different location, without written permission.© Copyright AERA 2006
TECHNICAL BULLETINModel: CELICA
Liter: 1.6L
V I N: 4AFE
Year: 88-97
January 1993
Mfg: TOYOTA
TB 971
Bulletin Diagram: Untitled Graphic #1914 for TB 00971
Page 4 of 5
Reference:
This information is provided from the best available sources. However, AERA does not assume responsibility for data accuracy or consequences of its application. Members and others are not authorized to reproduce or distribute this material in any form, or issue it to their branches, divisions, or subsidiaries, etc. at a different location, without written permission.© Copyright AERA 2006
TECHNICAL BULLETINModel: CELICA
Liter: 1.6L
V I N: 4AFE
Year: 88-97
January 1993
Mfg: TOYOTA
TB 971
Bulletin Diagram: Untitled Graphic #1915 for TB 00971
Page 5 of 5
Reference:
This information is provided from the best available sources. However, AERA does not assume responsibility for data accuracy or consequences of its application. Members and others are not authorized to reproduce or distribute this material in any form, or issue it to their branches, divisions, or subsidiaries, etc. at a different location, without written permission.© Copyright AERA 2006
