After changing fuel lines and installing inline fuel filter....

[Chrisazo1]

So this weekend I finally had everything I needed to start tackling the replacement of the grey tempo fuel lines on our pair of 96 GTI. My knuckles and the back of my hands look like I got in a fight with a stucco wall! Replacement was pretty straight forward after I studied some write ups on this site. Not too much issue inside the lines but these are low hour machines. Put a pick inside the selector valve though and scrapped some blackish film off of the inside walls that did not come out when I tried to clean it first so I just replaced the valve. Also, I installed a G2 style fuel filter and here is where my questions start... 1. When starting I first blew some air in through the compartment check valve to put some pressure in the tank. I did not put any fuel in the cylinders but instead grounded the plug wires and turned the fuel on. I cranked it and the lines primed right up. Switched to reserve and did the same thing. Reconnected plugs and she fired right off with a quick pull of the choke. Did I hurt anything by cranking it dry? 2. Why does the fuel filter not completely fill with fuel but have an air pocket on the high side? Do I need to do anything to get rid of that air pocket? 3. Unrelated, if I want to change the oil filters can I really just pinch the oil line before and after the filter, remove filter and install new. And let the air push back up into the tank if I vent the oil fill cap?

 

[Dr Honda]

1) Nope... you didn't do any damage

2) Since you are sucking the fuel... it's hard to draw out that air bubble. It will probably get smaller after a ride... but it wont' cause any issues.

3) this one you have to be careful. I will normally pinch the hose on both side. Then, I put the filter in the tank side, and slowly open the pinch while holding the other end of the filter up. This will allow the filter to fill with oil, and the air will come out. Then... I put it back in the engine side. If you are careful, you will purge the air during the install. But... be warned... if you trap air somewhere... it could cost you an engine. Since there are check valves after the pump... you have to build pressure to push the oil past them. If you get a big air bubble in the pump... you won't build pressure... and the oil pump will do nothing. (air will compress, where oil doesn't)

If you are going to try the method above... I would recommend adding oil to the main fuel tank for the first ride.

 

[Thumper3322]

But even after that oil method, bleed the system yes?

For a 5/16 fuel line, is the 5/16 filter ok, or have to go a size bigger?

1/4 tygon fuel line, 1/4 filter or 5/16?

 

[Dr Honda]

But even after that oil method, bleed the system yes?

Yes... I would recommend at least opening the bleed screw to make sure there is no air in the feed hose.

For a 5/16 fuel line, is the 5/16 filter ok, or have to go a size bigger?

It's fine. a 5/16" filter will flow plenty of fuel for your engine.

1/4 tygon fuel line, 1/4 filter or 5/16?

That depends on what you are replacing. Big hose on a smaller nipple will casue issues.

 

[Thumper3322]

My brothers 97 spx has only the 1/4 main fuel hose. Not replacing just adding the fuel filter.

 

[Chrisazo1]

I used the 5/16 filter on the 1/4 hose. I still need to do the wife's GTI so I will just do the same thing over again but will have to wait to switch the skis on the trailer so I can reach everything. Not having any issues just trying to be proactive. Was gonna pay to have the jet pump oil or the oil injection filters and tygon tubes replaced on them as well but cannot afford to do both. Which one should I be doing myself? Also wife is getting irritated with all of my garage time...

 

[Dr Honda]

OK... generally it will stretch. BUT... tygon is a little stiff, so you may have to use the G-2 1/4" filter.

 

[RodInEscondido]

I used the 5/16 filter on the 1/4 hose. I still need to do the wife's GTI so I will just do the same thing over again but will have to wait to switch the skis on the trailer so I can reach everything. Not having any issues just trying to be proactive. Was gonna pay to have the jet pump oil or the oil injection filters and tygon tubes replaced on them as well but cannot afford to do both. Which one should I be doing myself? Also wife is getting irritated with all of my garage time...

Maybe this is why I am always in hot water with the redhead, but I might suggest that you move the ski into the living room, then you do not need to hear complaints about the garage time .... just call it "together time" where she can hold one end of the oil line and watch TV at the same time. Probably a good thing for me that we are on opposite coasts, else she might be tracking me down with a bat!!
Rod

 

[n3k0de]

I have the 1/4 line with a 5/16 filter it is a tight fit but works.. and yes i have the air bubble.. which does go away over time but when i run the fule out it always comes back the next ride... never hurt anything or slowed me down.. i just go with it...

 

[Thumper3322]

It's a pain to find some of the parts you guys use down there.

Would these work?
http://www.princessauto.com/mobile/..."+Nylon+In+Line+Fuel+Filter&productID=8180051

http://www.princessauto.com/mobile/...Plastic+In-Line+Fuel+Filter&productID=8180069

Not trying to hijack the thread, still in relation to ops topic.

 

[Seadoobuddy]

If right size they should work but I would choose the first one over the second one....."the big fatty one"

 

[Thumper3322]

The first one is nylon, didn't matter?

 

[Chrisazo1]

Okay now a little concerned. After changing all of the fuel lines on both skis (thanks to the heads up from this forum!) I noticed that the inline filters I added really do not fill up with any fuel when running the skis. They seem to run fine but thinking I should remove the new additional inline filters. Not sure why the wouldn't fill up with fuel? Can anyone explain this to me and offer whether or not I should leave them in?

 

[Thumper3322]

They don't fill up when running you mean?

I just did mine on the weekend. first go sane thing weren't really full or filling. Do like you can see fuel tho.

But after a few runs on the hose, it seems to be fine and fill fine. If it's running fine wouldn't worry about it. Lake test it and see, but should be fine. Tones of guys are running this so...

 

[Chrisazo1]

One last bump for public opinion... Kind of afraid I might lean the motor out!