doing my major on a 89 mondial-t and replacing hoses. for the vacuum lines I was going to silicon does anybody have a recommendation on a source and type ? I ran into things like thick wall, reinforced, HPS extruded silicone vacuum tubing, etc. thanks
Silicon vacuum hoses tend to slip off their fitting, some use a small tie to keep that from happening. But the oem rubber hose does not do this, so why not use the oem material? The oem vacuum hose is also designed for vacuum, the silicone hose specifications vary so widely it would be easy to get an inappropriate hose, eg. Proper thickness but too soft will not do it. If it is for the colour that silicon hoses come in, I get that, it is simply that sometimes function should lead the priority.
Has anyone substitute the 1/2" vacuum line with Gates Green stripe coolant hose? Is there that much vacuum that it could collapse the hose?
I'm having a hard time locating the 1/2 hose. NAPA has hose for PVC that they are saying I could use and willing to sell by the foot. Is that suitable for the application?
Went thru my supply of vacuum hoses, and actually Gates does make a 1/2" ID Green Stripe Vacuum Brake Hose: https://www.gates.com/us/en/fluid-power/hydraulic-hose-and-couplings/air-brake-compressed-air/green-stripe-vacuum-brake-hose/p/3245-000000-000000/v/3276-04475 Don't have a specific recommendation for where to buy, but it shouldn't be rare. Here's a cross-section scan of a piece I had left over showing the extra reinforcement layers and large wall thickness (0.5" ID x 0.93" OD): Image Unavailable, Please Login If the "NAPA PVC" suggestion seems similar then it might be OK too.
O'reilly does not have a 1/2" brake booster hose. It looks like I will have to get a 3,000 PSI hydraulic hose to withstand the vacuum unless you have another suggestion.
I've no information on that (but can't believe that something like this is unobtanium as vacuum-assisted power brakes are still a thing). I did have a quick look at the brake vacuum hose on my TR, and it isn't quite as robust as the old piece of the Gates that I have (slightly smaller OD), but it's still very rigid. If you can "pinch" a length of hose closed by hand locally = it's probably too soft for a vacuum situation.
That hose is really driving me out of my mind. Didn't realize it was gonna become a project... Ok here it goes.. Gates green stripe 1/2 ID 27211 is no longer available. They make it in 5/8 and 3/4. They do have a really cheap 1/2 ID #27231. Will the 5/8 work? It has an OD of 1 1/16 ?
For the larger ID hose like 1/2 or 3/4 I found that braided hydraulic line works well - industrial supply by the foot.
Ok one problem solved. Continental is making a heavy wall 1/2" vacuum brake line #65103. They only sell it in 50 foot roll. Local suppliers don't have it. Only online about $5,0 a foot. I just have to find another 2 people that are in need to replace so we can share.
I just got some greenline hose yesterday in Vancouver, not sure what supplier though, it's still out there.
Reid, Do you mean Greenstripe? I have checked with gates distribution in KY and they confirmed that there is no stock in the US.
https://www.greenlinehose.com/catalog/products/Hoses-by-Application/Auto-Truck-Hose-Assemblies/dept-30Y I was offered greenstripe but it was on backorder, maybe forever?
