 AAR test |
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| oldschool |
 Oct 12 2009, 02:12 AM
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#1
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Advanced Member  Group: Members Posts: 3,362 Joined: 29-October 08 From: P-town Member No.: 9,705 Region Association: Southern California  |
is there a way to check if its working(AAR)
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| TravisNeff |
Oct 12 2009, 02:46 AM
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#2
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914 Guru Group: Members Posts: 5,082 Joined: 20-March 03 From: Mesa, AZ Member No.: 447 Region Association: Southwest Region 
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Yes, 2 tests. One is to hook it up to 12v power and see if it closes after a few minutes. That tests teh heater in the valve. Next is to put the AAR in the oven 250 degrees or so and see if it closes within about 10 minutes - that tests the spring (which regulates opening and closing of the valve.
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| type47 |
Oct 12 2009, 07:09 AM
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#3
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Viermeister Group: Members Posts: 4,254 Joined: 7-August 03 From: Vienna, VA Member No.: 994 Region Association: MidAtlantic Region |
In addition to the excellent advice above, you basically want to verify that the flow of air through the AAR will decrease (probably to no flow) as it heats up. You can test the flow by blowing air (as in through a hose connected to the port) through the nipples (IMG:style_emoticons/default/idea.gif) and verifying that the flow is less with higher temp.
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| jim_hoyland |
Oct 12 2009, 08:02 AM
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#4
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Get that VIN ? Group: Members Posts: 9,298 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California
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(IMG:style_emoticons/default/agree.gif) All the above. When I remove mine, I hold it up to the light and note the percentage of opening at ambient temperature. Mine typically is open 1/3 to 1/2.
Then, I'll hook it up directly to 12 volts and measure the time it takes to close. Mine average 1.5 - 2.0 minutes. If all is ok, a quick spray of WD40 and then reinstallation.. I've never done the oven test, but I have put the AAR into the freezer; the opening increases to 1/2 -3/4--on some AAR's, more. Picture: Looking through hole in AAR at ambient temperature--around 75 degrees Attached image(s) 
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| type47 |
Oct 12 2009, 08:48 AM
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#5
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Viermeister Group: Members Posts: 4,254 Joined: 7-August 03 From: Vienna, VA Member No.: 994 Region Association: MidAtlantic Region |
That brings up an interesting point: Jim is showing an L-jet AAR and you don't state what FI system you have; D-jet or L-jet. Really doesn't make any difference except D-jet AAR's are NLA new but I think you can still get L-jet AAR's new. Probably plenty used ones available.
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| oldschool |
Oct 12 2009, 12:37 PM
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#6
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Advanced Member Group: Members Posts: 3,362 Joined: 29-October 08 From: P-town Member No.: 9,705 Region Association: Southern California |
thanks Jim and all, 1973 1.7 with a D (IMG:style_emoticons/default/rolleyes.gif)
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| r_towle |
Oct 12 2009, 03:06 PM
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#7
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Custom Member Group: Members Posts: 24,574 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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Body is ground, red is positive.
I have rebuilt a few, its not really that hard...They just get dirty and full of crap that needs to be cleaned out. It should flow ZERO air once its heated up, or then you have a vacuum leak. Rich |
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