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H4 Install
Spending a cold Sunday in Garage fooling with this set of H4s I bought from fellow Pelican The question I have is how these bolt into housing Got to be more than just the screw for trim ring?
Thanks
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82 SC Twin Plug 3.2 SS ,46 PMO 
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03-25-2018, 09:36 AM
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It’s me again, guess I should read Wayne’s instruction on site use old retainer ring
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82 SC Twin Plug 3.2 SS ,46 PMO
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03-25-2018, 09:43 AM
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cycling has-been
Join Date: Sep 2004
Location: Jersey Shore
Posts: 7,237
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That's it pal.
The fender/bucket retainer lip at the top must be hooked under the trim ring, then you screw it into the single threaded tab at the bottom. I drilled a hole in the back of the headlight bucket and ran a safety chain to an anchor, then sealed it up with some clear silicon weather-caulk. All this after I lost one when I hit a pothole and saw one of the H4's go flying. Or, drill two holes and run a zip-tie through both holes and the wire braces holding the trim ring. This allows you to snug/tighten after install. Bill K
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73 911T MFI, 76 912E, 77 Turbo Carrera |
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03-25-2018, 09:49 AM
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Under the radar
Join Date: May 2007
Location: Fortuna, CA. On the Lost Coast near the Emerald Triangle
Posts: 7,129
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Make sure the tab that the screw threads into is sound. Some have reinforced that threaded area.
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Gordon ___________________________________ '71 911 Coupe 3,0L outlawed #56 PCA Redwood Region, GGR, NASA, Speed SF Trackrash's Garage :: My Garage |
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03-25-2018, 10:47 AM
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My install was going fine, new gaskets, black trim H4s......until on the second one - this tab stripped. So, now it's loose and I managed to get the bolt out (bolt with threaded hole in it). I guess I could thread a bigger screw, JB weld a nut on back of tab, or drill it out and find a metric riv-nut. Any suggestions?
Larger screw might be the temporary solution for the weekend.  Thanks
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1987 3.2 Carrera Coupe - Venetian Blue Instagram - roblkendrick |
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05-25-2018, 11:48 AM
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Guest
Posts: n/a
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If you have a welder, you might try closing up the hole, then drilling a new hole that starts the self-tapping machine screw.
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05-25-2018, 01:38 PM
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Formerly known as Syzygy
Join Date: Mar 2008
Location: Calgary, AB
Posts: 4,416
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JB weld a nut on the back side of the tab might be the easiest with least hassle. I had one strip out and used a riv-nut, but that was awkward and still doesn't fit just right.
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Kevin 1987 ROW coupe, Marine blue, with a couple extra goodies. The cars we love the best are the ones with human traits, warts and all. |
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05-25-2018, 02:12 PM
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No welder - but there is one M5 sppednut in town - so that should do for weekend and I’ll be buying rivet nut tool
Any other ideas? |
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05-25-2018, 02:14 PM
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abides.
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I used a rivet nut 10 years ago. No problems since then.
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Graham 1984 Carrera Targa |
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05-25-2018, 03:52 PM
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Got the last bag of M5 speednuts @ NAPA. Worked well, actually went back and did the other side, just to be safe.
Thanks for all the help/suggestions. Life saver below: 
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1987 3.2 Carrera Coupe - Venetian Blue Instagram - roblkendrick |
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05-25-2018, 04:48 PM
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Old School
My Garage
1971 Porsche 911
Baja Bug
1984 Porsche Carrera Targa
