Originally Posted by Nevelon (Post 97690)

Hello everyone,

I have a 1986 non-turbo automatic. I did some work on the metering unit, and all four lines broke. I tried to use a brass coupler to mend them, but they were all so brittle that they just kept snapping and deteriorating.

Now I have a few questions.

How Important are the lines?
Important
If I block off the mettering unit and pour oil into the gas tank, will everything be okay?
Yes, though you will need remove/cap off the old lines.
At what rate is the oil released into the motor? How much PSI is the oil being sent though the lines?
Dependant on throttle position. Use about 1oz. 2cycle oil to 1 gal of gas. Almost zero PSI, and very little flow. Think of it as more of a dripper than a pump.
Are there other material I can use besides the plastic lines?
If you rebuild the plastic lines with new tubing, they will last another 20 years. (or longer than the car will probably run) There are companies that sell the proper materials for $20-30
If I do replace all of the lines, I know I will have to remove the intake manifold. If I do this, are there any gaskets I will have to replace?
If you keep the manifolds/ throttle body as one piece, I think you will only have to replace one gasket (LIM to UIM gasket).

Thanks a lot for your time. Any and all help will be appreciated.

Originally Posted by Nevelon (Post 97752)

I want to avoid putting oil in the fuel tank. I'm worried about gunking things up.

Originally Posted by Rx-7fetish (Post 97760)

As long as you use 2 stroke you wont have that problem, its made to be mixed with gasoline, hundreds of (well maybe not quite that many) rx7 owners on this site alone premix everyday with no problems. Some owners premix even if there omp is working perfect just as an added safety measure.http://i113.photobucket.com/albums/n209/nubz1/drum.jpg I use this

Originally Posted by Nevelon (Post 97752)

Thanks a lot Ferocious.

The good thing is that I have not been driving it since the line incident.

The zero psi really surprised me. I know the oil pump can hit 110psi when the peddles down.

It's feed is pressurized I believe, but IIRC the pump uses a worm gear (think like a ancient way to move water uphill, screw type movement) to provide a flow of oil to the oil injectors. the intake stroke of the rotor pulls and atomizes the oil into the chamber.... i think.

I'm trying to go about this in an economical way. At 20 -30 dollars a line, that's a lot of cash. I can afford it, but I don't want too. Since there is near zero psi, what's stopping me from using other cheaper materials? Why did Mazda choose to use plastic?

I'm pretty sure I made mine for about $30 total for all four. I actually had to make them though, not buy them. I reused the banjo fittings and bought new line and even found the same type of metal clamp.

I want to avoid putting oil in the fuel tank. I'm worried about gunking things up.Nah, people do it all the time. As long as the vehicle gets driven you will be ok.

Originally Posted by FerociousP (Post 97848)

make sure you plug the lines themselves too...

Originally Posted by FerociousP (Post 97901)

2nd gens have 4 lines.

clamps
http://www1.mscdirect.com/CGI/N2DRVS...00000110251736

clamp tool (should be able to find it locally cheaper)
http://www1.mscdirect.com/CGI/NNSRIT...03484&PMT4NO=0

hose (gauge your own ID and wall thickness)
http://www1.mscdirect.com/CGI/N2DRVS...00000110252129