Date registered: May 2013
Vehicle: 1961 190SL
Location: Northern California, USA
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"So you are saying my 46 yr old brake lines need replacing?"
Dan and others,
In 50+ years of amateur mechanicing I have never heard of brake hoses "swelling shut" before reading it on this forum. But, being an amateur I checked that concept with the local, second generation brake supply store. These guys are very knowledgable and are so old school that they will actually recommend the product that is best for their customer, not best for their profit margin. An example of that is asbestos friction they recommended and obtained for me instead of techy, expensive ceramic or kevlar friction. I had forgotten how effective a friction material asbestos is. That stuff really works!
But back to the hoses. They also have never heard of any kind of quality hoses "swelling shut", and they sell brake parts for and service not only daily drivers and trailers but also heavy duty stuff from over the road trucks to gigantic earth moving equipment. They affirmed that if that is happening the hose material is simply incompatible with brake fluid.
Because I learned of the brake hose "swelling shut" issue on this forum I did remove the original hoses from my wife's 1961 190SL and replaced them with what I hope are quality parts. Three are made in USA Raybestos hoses and one is from West Germany. It turned out that the front hoses are the same ones used on a VW Fox. Finding current bubble flare hoses that fits older cars can be done.