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climberjohn Samba Member
Joined: January 11, 2005 Posts: 1840 Location: Portland Orygun
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Posted: Thu Apr 24, 2008 3:51 pm Post subject: Air flow sensor cover is falling off! |
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I was getting acquainted with the engine on my recently procured' 86 Westy yesterday. I wanted to check the air filter. In the process of getting the cover off, I very lightly tapped the cover on the air flow sensor (at least that’s what I think it is) and it just fell off! I have not been catching any Big Air off of speed bumps, which is good, as one bumpy dirt road would have vibrated this cover right off. It looks like it was held in place by a red colored gasket / sealant type of stuff.
The Bosch sensor is fairly new, judging only by the lack of dirt on it.
Questions . . .
Should this cover be on super tight and dustproof, or does one need to get inside it from time to time?
What type of sealer, adhesive, or gasket material should I use to reseal it?
_________________ '86 Westy, 2.5 Subaru power
Know your limits. Exceed them often. |
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Randy in Maine Samba Member
Joined: August 03, 2003 Posts: 34890 Location: The Beach
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Posted: Thu Apr 24, 2008 4:21 pm Post subject: |
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Put a dusting of silicon around the lip. I use Hylomar myself though. |
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Dogpilot Samba Member
Joined: October 03, 2005 Posts: 4205 Location: Flagstaff, AZ
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Posted: Thu Apr 24, 2008 4:39 pm Post subject: |
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Regular RTV or GE Silicone works just fine as well. If it gushes out the sides when you push it down, wipe it clean with a towel and some alcohol. _________________ Geology with a Syncro rocks!
86 Syncro Westy AKA "The Bughunter"
98 Disco I
08 Range Rover SC
08 VW Rabbit S
1951 O-1G |
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justcairns Samba Member
Joined: February 08, 2008 Posts: 88
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Posted: Thu Apr 24, 2008 5:59 pm Post subject: |
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Yeah,I've had the same problem. A little silicone goes a long way. |
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Wildthings Samba Member
Joined: March 13, 2005 Posts: 50255
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Posted: Thu Apr 24, 2008 6:46 pm Post subject: |
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If you think that you might have to remove it again sometime some just dab some silicone in the corners. That will keep it on though it will not be water tight. |
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tencentlife Samba Member
Joined: May 02, 2006 Posts: 10067 Location: Abiquiu, NM, USA
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Posted: Thu Apr 24, 2008 7:31 pm Post subject: |
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Hell, I mess with mine all the time trying diferent tuning combinations, and the cover just sets on there. I live 3 miles up the bumpy dusty road from hell, and it never, ever comes off. It just rides snugly on top there, and the insides stay perfectly clean. So, basically, no big deal. But, since you wouldn't have any reason to mess around in there yourself, a little smear of RTV around the rim will stick it down nice and tight. You can always pry it back off if you ever get brave and want to mess with the guts of this astoundingly crude instrument. _________________ Shop for unique Vanagon accessories at the Vanistan shop:
https://intrepidoverland.com/vanistan/
Please don't PM here, I will not reply.
Experience is kryptonite to doctrine. |
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OilNBolts Samba Member
Joined: May 12, 2007 Posts: 438 Location: Kentucky
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Posted: Thu Apr 24, 2008 8:31 pm Post subject: |
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Hate to differ with popular opinion here, but some types of RTV ( room temperature vulcanizing) silicone sealants can be very corrosive to conductive components. Read the label, and choose carefully.
http://code541.gsfc.nasa.gov/documents/materials_tips_PDFs/TIP%20044R.pdf
This paper refers to small gauge conductors imbeded in RTV, but I have dealt with corrosion problems on printed circuit boards that were only exposed to trapped acetic vapors. I wouldn't want my increasingly difficult (read expensive) to replace air metering potentiometer exposed to these salts. Or, for that matter, many of the gasses floating around a Vanagon's engine bay.
Non-corrosive products are available, such as Loctite's RTV 5145. _________________ Current fleet: Vanagons, two '88 GLs and an 89 Bluestar. Beetles, '63, '64, '72 convertible. Plus, four Subarus and three Prius. Too many cars. |
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mtlyrba Samba Member
Joined: December 05, 2009 Posts: 22 Location: Lake County, CA
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Posted: Sat Jul 06, 2019 3:05 pm Post subject: |
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Quote: |
Non-corrosive products are available, such as Loctite's RTV 5145. |
Thanks - I followed the RTV advice today. |
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