C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

93 Lumbar Support Pump

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Old Feb 20, 2007 | 04:28 PM
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Default 93 Lumbar Support Pump

The diaphram in the Lumbar Support Pump deteriorated. I have been unable to locate a replacement diaphram. I have been attempting to make a replacement diaphram. Does anyone know where a replacement diaphram can be purchased or what would be a suitable material to make a new diaphram from.

Thanks for your thoughts.
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Old Feb 20, 2007 | 05:25 PM
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This site shud help .....http://www.geocities.com/Yosemite/7491/tips.html
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Old Feb 20, 2007 | 05:42 PM
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Who have you tried, most every aftermarket place should have them.
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Old Feb 21, 2007 | 07:38 AM
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I replaced both of mine, one with a rubber glove and the other with an old tire bicycle tire tube. The tire tube was too thick, the rubber glove seems to work better. I used the wifes old kitchen gloves, not those thin blue ones they sell for mechanics.
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Old Feb 21, 2007 | 08:40 AM
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Originally Posted by kalister1
I used the wifes old kitchen gloves



My wife wasn't happy to see one of her gloves cut up, but the pump works great . 2 years no problem.
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Old Feb 21, 2007 | 08:58 PM
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Here is an idea: if you go to a Hospital, or try it with a Veterinary clinic.
A lot of times patients are conected to an IV line, that is for passing fluids.
This fluids come in glass bottles or plastic bottles.
The plastic ones come in two varieties, one is like a more rigid one, something like a softdrink would be in.
But the other one is made from some kind of more elastic plastic, maybe PVC, I am not sure. But this little "bags" can withstand a lot of pressure.
I have used them for a lot of different projects and they resist a lot. Much more than latex gloves because they do not degrade easily.

This bags with fluid come in different capacities, the most comon are 1 liter ( 1000 mililiters), 1/2 liter ( 500ml) and 1/4 liter ( 250ml).

Hope this works for you and you can get your hands on some empty bags.
Try to get one first with a Vet, or maybe a Paramedic.

Good luck!
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Old Feb 22, 2007 | 06:51 AM
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Something else that migh work well is the bag from a re-breather type oxygen mask. Just ask a Parameter or FireFighter for one, or maybe your local pharmacy. These bags are very durable and about the right size.
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Old Feb 22, 2007 | 10:19 AM
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The procedure is also describe in the C4 tech section. I did the replacment last weekend. It wasn't difficult.
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