3GM30F bleed screw

[splax]

I had a fuel leak and tried to tighten the bleed screw on the injection pump and it is stripped, whether by me or previously I am not sure. There does not seem to be an availability for this item apart from a spares kit. I plan to make one from a small M6 bolt purchased at the hardware store. Any other suggestions?

 

[kloudie1]

That is the one in the banjo bolt, right?? The newer ones don't have the screw.. ya just loosen the banjo bolt a bit to bleed. I like the screw bleeder but is is not uncommon to strip it. A plain bolt will be fine as long as the washer seals to stop any air leaks. Be really sure no metal shards from the work gets into the expensive high pressure pump.. Ya might want to stick a clean small magnet in there to pick up anything that stripped off.

 

[Rick]

Good idea with the magnet Kloudie! That is a tough one. If I am in the right place, that would be the first bleed downstream from the 2 micron filter that goes into the low pressure side of the pump. My question is, are we talking about the screw threads are stripped or is it the hole in the pump? Two different problems IMHO. Could you possibly retap? And I dont believe that particular bolt has a copper compress washer like the banjo fittings from the fuel pump to the primary filter. Metal into the blood stream of the engine is the tricky part but also self critiquing if she runs rough. Will be interested to see what thoughts are out there.

Best of luck

 

[Claude L.-Auger]

Ditto what Claude said but you'll not have the convenience of the bleed bolt. Try calling to Mack boring and see if they can get one for you. Or get one from a scrapped engine. Perhaps you can repair the threads with a metric tap & die set. Assuming of course we are talking about the bleed screw like in the attached pix, and that it is the threads on the bolt that are damaged and not in the pump.

 

[splax]

Yes, that is the bolt. I will try drilling the screw body to provide the bleed convenience. Metal in the system is a concern, but I really don't think I did this and the engine runs fine right now.

 

[Allan12210]

I did a Google search for M6 Banjo Bleeder Bolt and got quite a few hits. You might want to check that out too.

Here is one example:

http://www.motorcycle-superstore.com/14/71/983/29471/ITEM/Goodridge-Banjo-Bolt.aspx

 

[splax]

Well, I got a M6 bolt, drilled the body, ground and filed to get the right length, and worked a nut over the threads to make sure it was OK. Installed today, motored for over an hour, and things work.

 

[Lee Hadjiosif]

The most important thing to remember in preventing fuel leaks is that the copper washers on the bleeder and banjo bolts are one time use only. If you think you can stop the leak an a reused washer by tightening it, you will strip the threads for sure.