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Join Date: Mar 1999
Location: Quebec, Qc, Canada
Posts: 250
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Front rubber bumper top pictoral...
As i'm getting my front bumper rechromed i decided to buy a new front bumper top. It was now time to check what was going on inside the old rubber bumper top making it look 'bumpy'. As i never seen pictures of what was inside the bumper rubber i decided to sacrifice this one.
 Here is what i found:       I decided to cut it open from the back side. At first I decided to make only one cut (the one at the bottom of the picture). I could them pop the rear part off but was having a hard time with the front part as the rubber part didn't want to come loose from the metal stip. I noticed that the metal stip had holes in it at about every inch. So i decided to make another cut about the holes. Now a could pop the front part and reveal the metal stip... The rubber top was stored dry at the end of november. After opening it up, 2 areas where still wet... From where is this water coming from??? If you look at the pictures you will notice that the parts that are rusted are mysteriously near the bolts that fasten the rubber top to the bumper... My guess is that humidity and water get in the bumper by the surrounding of the bolts. This area doesn't offer much of a seal... I'll sure seal up this area on the new bumper top... Marc-André 70 914-6 conversion 3.0L Webers Last edited by si2t3m; 02-23-2003 at 04:36 PM.. |
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02-23-2003, 12:14 PM
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Join Date: Jan 2003
Location: Savannah, Ga.
Posts: 2,006
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I am gonna cut my brand new set up, and compare.
=) M
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I wish I had a dime for every penny I ever had. http://www.914club.com/bbs2/uploads/blog-1136350347.jpg |
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02-23-2003, 03:55 PM
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Join Date: Mar 2002
Location: My House
Posts: 5,345
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Bumpers chromed?
I've got the black ones myself and have been wanting them to be chrome. How much does that cost to get done?
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-The Mikester I heart Boobies |
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02-23-2003, 07:49 PM
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Join Date: Mar 1999
Location: Quebec, Qc, Canada
Posts: 250
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My front bumper is already chromed. It's just that those 33 years of road debris have dulled it out pretty much. I was quoted 450$ cdn to get it s stripped and replated.
Cheaper than a new one! Marc-André 70 914-6 conversion 3.0L webers |
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02-23-2003, 08:10 PM
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Me personally.. I like the 916 bumper
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72' 914 |
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02-24-2003, 12:06 AM
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Join Date: Apr 2002
Location: Massachusetts
Posts: 438
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Marc-Andre,
I think your analysis is going in the right direction. I bought a NEW rear rubber piece a few years ago, and there were voids in the rubber in several places, notably around where the screws come out. Before installing any new one, I highly recommend people use some good sealant to fill and seal these voids. I did, but then I don't plan on getting much wetness on the car and I don't know how many years it will hold up. Mark S. '70 914-6
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Mark S. '70 914-6 |
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02-24-2003, 07:33 AM
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Join Date: Oct 2002
Location: Tucson, AZ
Posts: 1,599
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Marc-André
I don't suppose there's any way to remove the rusted-out metal and replace with new metal? I don't want to put my bumpy ones back on when I reassemble the car but new ones are pretty expensive I believe. I was wondering if I could roll a strip of steel to approximate the original, then bond the old rubber over the top. Probably more trouble than what it's worth... Guy in sunny Tucson |
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02-24-2003, 11:43 AM
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Join Date: Mar 1999
Location: Quebec, Qc, Canada
Posts: 250
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914GT
The rubber skin can be seperated from the metal part Looky:     Initially i had made 2 cuts on each side of the holes in the metal part. I could then peel off part of the rubber part. Something was holding the top part. I took a utility knife and peeled of the remaining part inbetween the 2 cuts i had made carfully cutting the rubber in the holes. The rubber skin was easy to seperate afterwards. Don't know about replacing the metal part. The shape is way to complex for my skills!!! Looking at the rubber skin from the top part, you can't tell that it has been seperated. Unfortunatly it's still lumpy... I'll let it sit for a while and see what happens. The lumpy area is actually the change between the holes and the metal between them. The high parts in the rubber sking is where the metal is and the low part represents the holes. I think that once the lumps appear in the rubber skin, it's time to save some $$$ for a new one .... Unless someone has a bright idea??? Marc-André 70 914-6 conversion 3.0L Webers Last edited by si2t3m; 02-24-2003 at 05:21 PM.. |
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02-24-2003, 05:13 PM
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Join Date: Oct 2002
Location: Tucson, AZ
Posts: 1,599
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Marc-André
Actually your pictures gave me some encouragement. If I cut a curved strip of 18 or 20 ga steel and roll the edges with my bead roller I might be able to fabricate a part. Then the question is can I get the bumps out by putting a lot of contact adhesive on it and clamping it. I know mine must be rusted inside as they seemed 'crunchy' when I took the bumper off. Well might be worth a try. I can always fork out a couple hundred bucks and buy a new one I guess  Guy |
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02-24-2003, 06:33 PM
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Join Date: Jun 2001
Location: Lake Oswego, Oregon
Posts: 874
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What about stainless steel or aluminum for a new inside piece?
Craig C. Laughlin
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Craig C. Laughlin CAMP 914 Helping to bring your 914 into the 21st century. http://www.camp914.com |
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02-24-2003, 08:28 PM
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Join Date: Oct 2002
Location: Tucson, AZ
Posts: 1,599
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Craig
Stainless or alum definitely better for corrosion/rust, I'd probably try steel first since I already have plenty of it and wouldn't be out anything but my time if it didn't work. I'd shoot some epoxy on it, probably never rust here in Tucson (my whole car has been bare metal since October and still no sign of rust). Guy |
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02-25-2003, 06:14 AM
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1972 Porsche 914 2.0L Hydrolic 
