Engines Exempted to Higher Opacity Cutpoints

This page updated February 19, 2013

Technical Bulletin
(Ref. No.: MSD-NHDDS-96-006)

The following is a listing of approved exempted heavy-duty engines pursuant to Section 2182(b) of Title 13 - California Code of Regulations:

Engines Exempted to Higher Opacity Cutpoints

Manufacturer

No. of
Engine Families

Exempt / App.
Opacity

Model Years
DDC (1)

6

75%

1987-90

Hypermax (2)

2

75%

1985-91

Caterpillar (3)

2

70%

1989-90

Cummins (4)

1

75%

1988-92

(1)

Series 60 DDEC I and DDEC II Engine Families. DDC is upgrading these engines, by recalibrating the on-board electronic controls during routine maintenance, to comply with the applicable cutpoint.

(2)

This exemption applies to an aftermarket parts turbo-charger installation.

(3)

Model 3176 Electronic Engines

(4)

L-10 Engine Family-CPL 1226
These exemptions will be reviewed by ARB staff subsequent to the adoption of the new SAE J1667 specifications into regulations as required by AB 584 of 1993 (HSC 44011.6 et seq.). For further information, contact Don Chernich at (916) 322-7061 or Darryl Gaslan at (626) 450-6158.

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