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Network Native
Join Date: Jan 2007
Location: SoCal
Posts: 10,349
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AFM to U tube fit?
On my 83 L jet the barn door air flow meter is bolted firmly to the air filter box, and the air filter box bottom is bolted to a pair of rubber standoff things to the motor, all very solid feeling etc. With the intake "body" off I could clearly see the AFM to U tube connection, and it seemed to me it could have gone in another 1/4" or so.
Anybody know if this is a normal fit? The MAF on my 85 fully seats with a flat spot at the top of the "neck" for an O ring, but the AFM neck has no flat spot, so I am thinking maybe it isn't designed to fit flush with the U? The AFM neck also seems to have a taper. It did seem to seal fine, but I'm still wondering. |
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08-01-2008, 11:45 AM
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Architecture & Porsche's
Join Date: Jan 2006
Location: Austin, Texas
Posts: 3,189
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my track car has this same thing: AFM could press down a good 1/4" or so if it weren't for the air-box holding it up.
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Porsche Club Racing National Scrutineer '89 Andial 951 '82 928R '74 911 RSR 3.6 |
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08-01-2008, 12:54 PM
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Banned
Join Date: Mar 2007
Location: Ft.Lauderdale, FLORIDA
Posts: 2,813
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I'm not familiar with the L-jet flappy box fit, but make sure that the O-ring on the bottom of the MAF and the O-ring in the U on your '85 are in good shape. I had all sorts of driveability issues on my own '85 until I replaced both of these.
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08-01-2008, 01:19 PM
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Network Native
Join Date: Jan 2007
Location: SoCal
Posts: 10,349
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The 85 got new rubber and plenty of silicone grease, plus it does fit all the way down with the oring around the neck compressed between the U and the flat spot on the MAF.
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08-01-2008, 06:12 PM
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928: Serial Enabler
Join Date: Sep 2007
Location: Elkhart, Indiana
Posts: 2,929
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Not sure if I'm telling you anything you didn't already realize, but 84 US uses a big O-ring (dif.size than 85/86).
Doesn't really seat on any land-area, just kind of presses in. I had massive leakage originally, but no new O-ring, so I wrapped ducttape around the AFM as patch while waiting for the new O-ring. Did same as you, new O-ring + some silicone grease.
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84,85,86 928 cars |
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08-01-2008, 11:35 PM
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