tonyge

i heard that mazda had a subzero thing installed and it injects coolant cause something to do with cold start. how do i dissable it?

hypntyz7

First, they dont work. Second, there is a TSB saying to remove them.

Find the reservoir, on the firewall far pasenger side corner. FOllow the vacuum hose back to the engine. Cut it. Now, on the bottom front of the reservoir, there is a small plug. Disconnect it. Now pull really hard, toward the strut tower, on the jug. IT will slide right off the bracket. Throw it as far as you can.

Scott 89t2

do you need to plug the line to the egine after you cut it?

it never gets below 0 F here anyways

Thaniel

California cars weren't sold with the sub zero system on them.

Least mine didn't have it.

hypntyz7

You can plug it, but I never do. It would only be open at a certain low temperature, and I dont think any of us live in alaska.

copandengr

The line referred to in the earlier reply is always open to manifold vacuum. The sub-zero system is activated by the oil temperature probe in the oil pan. When the temp reaches a certain low, the electric pump in the sub-zero reservoir comes on and pumps coolant into this line.

You can easily plug this fitting on the associated valve by going to your local parts store and purchasing a vacuum fitting cap. These are rubber caps that fit over the steel tube and usually are sold in a package containing a variety of sizes. They are only a couple of dollars for several of them.

If you do not plug or cap this fitting you will have a vacuum leak.
If you are too cheap to buy the rubber caps a golf tee will do the job. Just stick it in the hose after you remove it from the reservoir.