Dorman 47076 Vacuum Storage Canister

This has a built in one-way valve. Be sure to get it plumbed correctly or it will not function. And I just got done replacing the one-way valve coming off the manifold! Oh well, now there's two in series. The hooded port towards vacuum actuators in dash, the non-hooded port towards engine manifold.Yes I was using this on a "does not fit" project. The 1992 Roadmaster and Caprice (GM B bodies 91-96) have vacuum canisters up under the dash above the glove box but you cannot get to it without removing the entire dash. So I bypassed it and placed this dorman under the hood where I can get to it easy. For those that need the info, here is the vacuum line color code. Orange Line: Controls the defrost door. Gray Line: Controls the fresh air/recirculation door. Purple Line: Connects directly from the under-dash vacuum canister to supply the main vacuum source to your climate control selector. Black Line is vacuum supply from manifold to the under-dash vacuum canister. I accidently pulled the purple line off the under-dash canister and did not want to pull the dash, couldn't even see the port/canister under the dash with a snake cam. Original problem on the Roadmaster was the vacuum selector valve as part of the climate control apparatus. One half has a sector gear that rotates when you slide the selector lever which is attached to a linear gear. The other half is fixed with colored vacuum lines running where needed. Between the two is an application specific (It appears roadmaster is different than caprice in this case) molded silicone seal that channels vacuum as needed. The two halves were held together by a plastic center clip that kinda looks like a rivet with two hooked ears. The ears snapped off. Judging by the buildup on the seal since that rivet snapped, musta been 20 years ago. Replaced the plastic rivet with an M4 thin flathead and nylock and voila, back in bidness. I'm just glad all the vacuum actuators still function and without leak. Right here on amazon pick up a vacuum / brake line bleed tool to test actuators, they are inexpensive and effective. I use 3mm and 4mm silicone vacuum line as well as 4mm hard plastic line. When joining use clear RTV like GE2 or JB Weld. Stick the hard line in the soft then rtv around the interface, permanent joint.

Good replacement used on my 1965 Impala

Very very pleased with this product. It was a tremendous value. My old Ford truck’s AC works but I’d lose the dash vents airflow to the floor and defrost vent when I’d accelerate. I knew my old Tun can vacuum canister must be leaking. I bought this new one off Amazon hoping it would fix the issue. It did! Now my AC stays blowing at me and I’m pretty sure my truck now has a lot more power. I could not be happier. Also, it was super easy to install. I don’t usually write reviews for Amazon but I’m doing for this!

So far so good runs my truck

Priced so you can replace the old canister without going deep into your wallet. My 2002 Sonoma has the original vacuum canister mounted in the front fender where you cannot get at it and there is nobody selling a new OEM unit anyway. I just tucked this one in nearby and shifted the hose, easy! Did not solve my problem but eliminated one possible problem. Would be nice if it came with caps to use on the unused vacuum port instead of telling us that it has a valve inside each port to prevent leaks. It comes from China...do you believe that is has valves inside? I plugged the unused port with epoxy-now I know it won't be leaking.

Used this in place of a broken vac canister on my2019 econoline van. Fixed my vent defrost floor selector issue in 10 mins.

As described

We have a '67 Mustang with factory air that did not work right. We needed more vacuum and this helped.

worked well, just as advertised.

The vacuum tank works as it is supposed to. The shipping on the other hand, had much to be desired. They lost the first one on 2 day shipping, then stuck the second one for replacement in the mail of all things. For 2 weeks, I did not have proper 4x4 or heater controls while waiting for the product to arrive. All good now though.

Hard to explain and dont have a picture, but after about a month or 2 it now looks like a deflated ball? It did not melt due to heat. The INITIAL fit and finish and.. shape.. was good.