Approval Details

Valid E.O.

Validity

This Executive Order approved the specified parts on on July 12, 1978.
As of Tuesday, June 17th, 2025 this Executive Order has not been overturned or superceeded.

Approved Parts

Models
1978 and older gasoline vehicles.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-81
  • Executive Order 81 / D81
  • ARB # D-81
  • Executive Order No: D-81
  • C.A.R.B. No. D-81
  • Resolution D-81
For Free CARB Executive Order Status verification, email an image of the device Executive Order label as well as the Year/Make/Model and Test Group # of the vehicle to [email protected]

Download: Executive Order D-81 PDF

D-81 Document:

CARB_D-81

T .O {Beoor— (Page 1 of 2) State of California AIR RESOURCES BOARD EXECUTIVE ORDER D—81 Relating to Exemptions under Section 27156 of the Vehicle Code WALKER ENGINEERING COMPANY "AIRSEP" Pursuant to the authority vested in the Air Resources Board by Section 27156 of the Vehicle Code; and Pursuant to the authority vested in the undersigned by Section 39515 of the Health and Safety Code and Executive Order G—30A;— IT IS ORDERED AND RESOLVED: That the installation of the "Airsep" device manufactured by the Walker Engineering Company, 2240 Sawtelle Boulevard, Los Angeles, California 90064, has been found to not reduce the effective— ness of required motor vehicle pollution control devices and, therefore, is exempt from the prohibitions of Section 27156 of the Vehicle. Code for installation on 1978 and older gasoline powered vehicles. This Executive Order is valid provided that installation instructions for this device will not recommend tuning the vehicle to specifications different from those listed by the vehicle manufacturer. Changes made to the design or operating conditions of the device, as exempted by the Air Resources Board, that adversely affect the per— formance of a vehicle‘s pollution control system shall invalidate this Executive Order. Marketing of this device using an identification other than that shown in this Executive Order or marketing of this device for an application other than those listed in this Executive Order shall be prohibited unless prior approval is obtained from the Air Resources Board. This Executive Order does not constitute any opinion as to the effect that the use of this device may have on any warranty either expressed or implied by the vehicle manufacturer. THIS EXECUTIVE ORDER DOES NOT CONSTITUTE A CERTIFICATION, ACCREDITATION, APPROVAL, OR ANY OTHER TYPE OF ENDORSEMENT BY THE AIR RESOURCES BOARD OF ANY CLAIMS OF THE APPLICANT CONCERNING ANTI—POLLUTION BENEFITS OR ANY ALLEGED BENEFITS OF THE "AIRSEP DEVICE." No claim of any kind, such as "Approved by Air Resources Board" may be made with respect to the action taken herein in any advertising or other oral or written communication.

WALKER ENGINEERING COMPANY «. EXECUTIVE ORDER D—81 "AIRSEP" (Page 2 of 2) Section 17500 of the Business and Professions Code makes untrue or mis— leading advertising unlawful, and Section 17534 makes violation punishable as a misdemeanor. Section 43644 of the Health and Safety Code provides as follows: "43644. {a) No person shall install, sell, offer for sale, or advertise, or, except in an application to the state board for certification of a device, represent, any device as a motor vehicle pollution control device for use on any used motor vehicle unless that device has been certified by the state board. No person shall sell, offer for sale, advertise, or represent any motor vehicle pollution control device as a certified device which, in fact, is not a certified device. Any violation of this subdivision is a misdemeanor." Any apparent violation of the conditions of this Executive Order will be submitted to the Attorney General of California for such action as he deems advisable. Ah Executed at Sacramento, California, this ié} day of July, 1978. SVRmaury w + Thomas C. Austin Deputy Executive Officer

C}Cfiflflfli/bfify// ROUGH DRAFT Mr. Robert A. Walker . President _ . Walker Engineering Company 2240 Sawtelle Blvd. Los Angeles, CA 90064 Dear Mr. Walker: This is in responée to your request for an exemp— tion from the prohibitions of Section 27156 of the California Motor Vehicle Code for the "Airsep" device to be used on 1978 and older model véhicles. Our evaluation, documented in the enclosed staff report, indicates that the installation of the "Airsep" device would not cause any adverse affects on emissions. Enclosed you will find Executive Order D—81 exempting the "Airsep" from the prohibitions of Section 27156 of the Motor Vehicle Code foruse on all 1978 and older model vehicles. * Should you have any questions regarding this matter, please contact Mr. N. Ka&ne, Manager, Aftermarket Parts and Modifications Evaluation Section at (213) 575— 68 39. Sincerely} ORIGINAL SigNED By Thomas C. Austin Deputy Executive Officer Attachment

State of California AIR RESOURCES BOARD June 16, 1978 Evaluation of the Walker Engineering Company "Airsep" Device in Accordance with Section 2222, Title 13 of the California Administrative Code I. Introduction Walker Engineering Cémpany, 2240 Sawtelle Boulevard, Los Angeles, California 90064, has applied for an exemption for the "Airsep" device from the prohibitions of Section 27156 of the Vehicle Code (See Exhibit A). The applicant is requesting that an exemption be granted for 1978 and older gasoline powered vehicles. II. System Descrigtion The "Airsep" is a b]owby gas—oil separator installed as part of the Positive Crankcease Ventilation system. The blowby gas is taken from the crankcease through an opening in each rocker arm cover and fed to the "Airsep" device. The "Airsep" device sepa— rates the gases from the oil. The oil is allowed to flow back into the crankease. The oil free gases are then split into two streams. One stream passes through the PCV valve into the intake manifold. The other goes into the air cleaner. III. System Eva1uati6n The applicant submitted CVS—75 data obtainéd at the Auto Club of _ Southern California Laboratory, 2601 So. Figuerca Street, Los Angeles, —California; a recognized vehicle emission laboratory. The tests were run on a 1973 Dodge Dart, 318—¥8 engine, with automatic trahsmission.and 46008 miles. The results were as follows:

2. Baseline With Airsep gm/mi gm/mi HC 2.93 2.68 co . 41. > 34.93 NOx . 5.49 5.22 The applicant also submitted tests run by Chrysler on a new 1978 Le Baron, V—8 with automatic transmission, with approximately 400 miles on the odometer. These tests gave the following results: Baseline.gm/mi With Airsep,.gm/mi CVS—75 Hwy CVS—75 Hwy _’HC .11 .09 12 w10 CO 1. 24 .49 3.25 48 NOx 1.61 0 2.41 1.31 2.33 Economy mi/gal 13.9 18.4 13.7 18.9 Since these tests were run on an unstabilized vehicle just off the assembly lines, the variations may be due to green engine effects. This device is similar to the previously approved "Oildex" system which had received extens{ve tests by fihe Air Resources Board prior to its certification. The staff therefore believes there is no need for further tests at this facility. IV. Manufacturer‘s Claims The applicant has agreed to delete his claims concerning fuel economy, pollution reduction, sparkplug life, and optimum ignition timing adjustments. It is the staff‘s opinion that there is some benefit in keeping oil vapors from being carried by the blowby gases through the PCV system into the air cleaner and the induction system.

Conclusion and Recommendation The app]jéant's device consists of the existing PCV éystem plus a mechanism for separating the oil droplets from the blowby gas. The staff belfeves that this will not result in afi increase in emissions. The submitted test data in general verified this opinion; The staff‘ therefore recommends that the Walker Engineering Company be granted an exemption, by Executive~brder D—81, for its ;Airsep" device from the prohibitions of Vehicle Code Section 27156 for 1978 and older model vehicles.

EXHIBIT A Allen L. Eest _ 606 Lazy Springs br. ked Gak, Texas 75154 March 13, 1978 Mr. G. C. Hass, Chief Division of Vehicle Emission Control Air Resources Board 9528 Telstar Avenue i RECEIVED Plikis HAR 2 7 7: El Honte, California 91713 | Bear Hr.. Hass: We are hereby applying to the Air Resources Board of the State of California for exemption to Vehicle Code 27156 for the oil recovery system manufactured by Walker Engineer— ing Company. This oil recovery—system will be marketed under the brand name "AIRSEP". Enclosed is the information and test data established by the "Eoard Criteria" for expediting our aspplication. Shoulé you find that additional information is required, please call me collect at my office 214 330—5261 or my home 214 223—5217. N Thank you for your assistance in this matter. Yours very truly, Allen R. Best ARB/ jb — Enclosures

Ta%efz Engineertug Gowfp cwg November 28, 1977 Mr. G. S. Haas Haagen—Smit Laboratory Air Resources Board 9528 Telstar Avenue El Monte, California 91731 Gentlemen : This is to advise you that we are in the process of preparing certain data preliminary to making application for exemption from the prohibitions of provisions of California Vehicle Code, Section 27156. Mr. Allen Best on behalf of Walker Engineering Company is authorized and empowered to conduct all matters necessary to—securing such exemption from the Air Resources Board and act as our authorized representa— tive. Ve ruly yoy&s, v e ~ Robert A. Walker omm . President RAW/ 1w 2240 SAWTELLE BLVD. e LOS ANGELES, CALIF. 90064 «* (213) 272—1248

Ouf request for exemption from the prohibitions of Yehicle Code 27156 covers all gasoline powered cars, light and heavy trucks 1965 and newer. . Our tests show the AIESEP,l air—oil separator to be compatable with all emission controlled vehicles 100 cc and above. +

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warranty Walker warrants its AIRSEPs that it will repair or replace free at any time any AIRSEP as it is applied in its first use or original application to an internal com— bustion engine found under normal use in the United States or Canada to be defective in factory materials or workman— ship, except hoses and clamps. All that Walker requires is that there is no intentional damage to the AIRSEP and that it be inspected and certified to be in its original installed vehicle by a Walker dealer and that the AIRSEP be returned to WALKER with such dealer certification for replacement. THERE IS NO OTHER EXPRESS WARRANTY ON THE AIRSEP. . ANY IMPLIED WARRANTY OF MERCHANTABILITY, OR FIT— NESS IS LIMITED BY THE TERMS OF THIS WRITTEN WARRAWNTY. TO THE EXTENT ALLOWED BY LAW, NEITHER WALKER NOR THE SELLING DEALER SHALL HAVE ANY RESPONSIBILITY FOR LOSS ~OF USE OF, LOSS OF TIME, INCONVENIENCE, COMMERCIAL LOSS OR CONSEQUENTIAL DAMACE TO THE VEHICLE OR EQUIPMENT, TO WHICH THE AIRSEP IS APPLIED.

Outside Air to Carburetor Crankcase Vapor Air Return to Carburetor Intake Air to Eng'me'. 00 PCV Valve— — [ O.a ~ ‘aArser < Air—Oi : Crankcase Separator Vapor Lines sn :B Qil Return Line /i%a @J WALKER ENGINEERING COMPANY 2240 Sawtells Boulevard, Los Angeles, Cchformc 90064 » Telaphone: (213) 2721248

AIRSEP GENERAL INSTALLATION INSTRUCTIONS NOTE: THE FOLLOWING INSTRUCTIOXS ARE BROKEN DOWN INTO THE DETAIL AREAS NECESSARY TO INSTALL THE AIRSEP.. FIRST DETERMINE THE DETAIL AREA FOR THE STEP YOU ARE WORKING ON, i.e. AIRSEP MOUNTING IS DETAIL 1. THEN REFER TO THE WRITTEN INSTRUCTIONS UNDER DETAIL. DETAIL 1. AIRSEP MOUNTING Observe the following installation conditions before mounting the AIRSEP. 1. When 1nsta11ed the bottom of the AIRSEP must be at least 3" above the. oil level in the oil pan. 2. The 2" return air duct flange on the top of the ALIRSEP, must be at least 3" below any upper limiting surface of the vehicle, i.e. the hood. 3. The 3/4" breather lines must be able to be connected to the AIRSEP unit without kinking. 4. The mounting bracket must be installed so that the AIRSEP will be in a vertical plane + 5 degrees. STEPS: 1. Secure mounting bracket to located position, with the large clamp between the bracket and the structure. 2. Clamp the AIRSEP unit to the mounting bracket using the large clamp. (Position the hose bibs so that the 3/4" lines can be easily 1nsta11ed) DETATL _ 2. VALVE COVER FITTINGS Observe the following installation conditions before installing the valve cover flttlngs 1. Locate a position on the valve cover so that when the valve covéer fittings are installed, they will not interfere with the operation of the rocker arms. 2. —The PCV valve position may be used in one valve cover, if when the PCV valve grommet is removed, there is a 7/8" hole in the valve cover. 3. After drilling the valve cover, remove all metal chips using ; a magnet. STEPS: 1. Using a 7/8" hole saw, drill a 7/8" hole in the valve covers (If the existing PCV valve hole is to be used, drill only one valve cover)}. / 2. Install the 3/4" grommet in the valve cover. 3. Install the plastic elbow in the grommet. i 4. Cut, connect and clamp the two (2) 3/4" hoses to the plastic | valve cover fittings and the AIRSEP unit. i DETATIL 3. AIRSEP, AIR RETURN DUCT Observe the following installation conditions before mounting the AIRSEP air return duct. 1. The air return duct elbow, should be installed in the air cleaner top, in the low pressure area between the air filter element and the carburetor. If this is not possible, then the air may be returned to the side of the air cleaner.

' ALKRSEP GENERAL INSTALLATION INSTRUCTIONS CONT. DETAIL 3. (conr STEPS: Using a hole saw, drill a 1—7/8" hole in the top of the air cleaner housing. Install the elbow fitting from the top inward, with the nut on the inside. Drill and cotter pin the nut to the elbow. Install the 2" duct from the air cleaner elbow to the AIRSEP unit with the end that has the stainless steel element closest to the air cleaner. Clamp both ends of the hose. DETAIL 4 4. PCV _VALVE INSTALLATION | Observe the following 1nsta11at10n conditions before installing: the PCV valve. 1. If the original PCV valve is to be re-used it should be thoroughly cleaned before re—using. 2. Some PCV valves require installation in a vertical position to operate properly. Besure which type you have and install it vertically or otherwise as appropriate. STEPS: Remove the old PCV valve line from the bottom of the Carburetor (or in some cases, from the Manifold). ’ Install a short line between the PCV valve and the AIRSEP . PCV valve outlet. Clamp both ends in place. Install a long line from the outlet of the PCVvalve to the PCV valve inlet on the bottom of the Carburetor. Clamp both ends. [ 4. Tie the line in place using tie wraps. DETAIL 5 5. OIL RETURN FITTING AND LINE Observe the following 1nstallatlon conditions before 1nsta111ng the oil return fitting and line. 1. Oil pan fitting should be installed above the oil level in the pan. 2. Oil return line, should be installed so that it has as few low spots in it as possible. STEPS: 1. Install the oil return flttlng in the pan. Using a 45° cente: punch, punch a 3/16" hole in the center of the side of the oi pan 1—1/2" below the superior lip of the oil pan well above the interior oil level on the side of the engine nearest to the AIRSEP. Insert the self tapping oil pan fitting into the hole until the rubber on the washer seals the fitting. Be certain that the fitting is inserted straight rather than at an angle. Insert the threaded hose nipple into the pan fitti: Attach the oil return line from the oil drain tube on the ALIRSEP to the self tapping oil pan fitting. Clamp both ends ‘ of the line. Install the hose nipple in the oil pan fitting. Connect the 3/8" drain hose from the pan fitting to the oil outlet fitting on the AIRSEP. Clamp both ends of the line. KW—5000, KW—5002 o REV. LTR.

‘CENERAL INSTALILATION INSTRUCTIONS AIRSEP Outside Air to Carburetor | ATRSEP AIR RETURN DUC'I‘k (DETATL 3] rankcaseVapor \ E_.C,.._. VA.LYE _.ETAIL 4) PCV Valve— [ fi:fi%fip \,\‘,Crankcase Separator Y $ } ; Vapor Lines N /) ~._ h\ R 4Ty ~—AIRSEP MOUNTING l (DETAIL 1) . ' (7 L\-> it mmmmmme mmndp QIL_RETURN FI NG ~ (DETAIL5) ;{3\;7 WALKER ENGINEERING COMPANY \..f 2240 Sawtelle Souievard, Los Angeles, California 200464 * Telephone: (213) 272—1248 KW—5000, KW—5002 REVY LTR.

NIAYLLMiL Late Asdadiab k arr oo en nc & um ne m e w n en w ns e HhXD &AC.TVRE ABnt. mQSCp ~3" NN. M RILTO STLUCNMEE] \-“ + /\ J | mmRArmammL\t 0 SECULLE NWUNUNL | EZNCETTD BHTO STRUCIUWEL MSINL J/h0" Boattell ° WNUTS £ Lic&.‘ WASNERS R OIL LEUEL_ IN AIL FAN ‘KW—5000, KW—5002 REV. LTR.

*AIRSEP General Maintenance Instructions Routine Maintenance: 1, All hoses and fittings should be given a visual inspection every tune—up. . 2. Each engine overhaul, the Airsep should be removed and rensed out thouroghly using solvent. Inspect all hoses and fittings and replace as required. >

en ) AIRSEP Model "OJ" + Outside Air to Carburetor Crgnkcase Vapor fT— 4 S ) * . » Air Return to Carburetor Intake Air to Engine | %f» mz oi# l r—:F —— PCV Valve— g 3' -l c mE AIRSEP € Air—Oi Crankcase Separator VL}{J Vapor Lines 7 . > Oif ReturnLine + ' ;% . ______ hmz

Cuts oil consumption 50 to 80% m Reduces separates the oil from the emission vapors and refurns it frequency of cilchange a Keepstruck and sutround— directly to the crankcase. ing atmosphere clean by eliminating oil blowby Oil consumption is greatly reduced as well as fre— Increased power and—gus—mileage i Lower costs / quency of crankease oil replenishment. Tests have indi— more profits cated a recovery of 50 to 80% of crankease oil previously . ARSEP Air—Oif Separator will improve the efficiency wasted, depending on the type and condition of the en— of your frucking operations dramati¢ally whether on short gine. Areas previously exposed to oil blowby remain clean haul delivery runs or long haulinfer—state service. and engine breathing is vastly improved resulting in in— Designed to separate air and oil in crankcase venti— creased power—and—gastiine—mileage. tation systems or breathers on internal combustion en— in vehicles subject to emission controls, AIRSEP gines, the AIRSEP aftaches to the crankease vent and ehmmo?es the major cause of combustion chamber con— Continued on bock

PrtSpa E {/u.-..,z*r f///C/:/r. Aominution as well as the cause of PCV valvé/cloggihg: of d{mlacemenAis easily aftoched to the crankcase ‘This condamination reduction also increases "pakplug vent and issecured by sturdy clamps. . fite..allows reduction in engine ‘operating temperatures «AIRSEP, with no moving parts. is designed to last the ormils adjusiment—te—optimerm—ignition—tming:—thus life of your engine. Depending on the number of miles ° Iharreduoing —exhoust—emission—contaminaats; partic— traveled daily, operators may well recover the entite cost .arly in low speed, high vacuum periods of engine opeta— of an AJRSEP installation in asliftle as 3 to 6 months. tion. Lowered operating casts mean increased profils so The AIRSEP oit recovery system is only slighily larger why nof fook info the benefits that the AIRSEP Model "OJ" than an oil filter cartidge and it is available for all config— can bring to your trucking operations. Contaoct your urations of gasoline or other gas fired engines regordless nearest Walker Dealer or call us direct. . Prices (EO.8. Los Angeles) Model "OJ" Chrome plated $194 Black epoxy $178 All prices include mounting brackets and clamps. Hoses and installation are not included. Schematic Diagram of AIRSEP Installation on Standard Gasoline Engirie Outside Air to Carburetor 2 Crankcase Vapor If-_.é ,.<L. j m > Air Return to Carburetor Intake Air to Engine \V(» —————rt» =p<p =——————ito[ —oflv vi\a»‘ q(‘_] & PCV Valve— 1 l @‘% / & AIRSEP £ 4‘//Crankca > se \ J Air—Oi Separator Vapor Lines ¢ I > We mm mm ms®K Oil Return Line TX WALKER ENGINEERING COMPANY 2240 Sowlelle Boulevard, tos Angeles. California 20064 « Telephone: {213) 272—1248


Document Created: 2005-09-01 12:43:25
Document Modified: 2005-09-01 12:43:25

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