Re: [MBZ] OT Small diesel engine fuel problem
Leaking lift pump. Peter -Original Message- From: Harry Watkins [EMAIL PROTECTED] Sent: Jul 22, 2008 12:58 PM To: Mercedes Discussion List mercedes@okiebenz.com Subject: [MBZ] OT Small diesel engine fuel problem I keep getting air at the middle injector nut during bleeding. The two outside injectors bled the air and only fuel comes out. This is a 3-cyl Mitsubishi and here is what I have tried. Replaced the delivery valve o-rings twice, once from my Harbor Freight box of o-rings, then I ordered and installed the OEM o-rings. I crack open the middle nut with the engine warm and running and the bubbles never stop. I did a hand pressure blue dye test on the fit between the fuel line and delivery valve and got a solid transfer. I placed the in-put fuel hose in a clear jug and ran the supply pump looking for bubbles and got none. It also passed the supply test of at least 8 oz in 15 seconds, which includes going through the pump filter and the main screw-on filter. I'm not sure if this is a clue or not, but I get very little return fuel. At idle I saw none, but I had left the line off during a test drive and it wet that area by the time I got back. I have ordered delivery valve springs and copper seals for my next try. Does anyone have suggestion on how a steady supply of air could get in? Thanks Harry ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT Small diesel engine fuel problem
Peter wrote Leaking lift pump. Peter, would that be an individual pump for that middle delivery valve? In other words are there three lift pumps? Thanks Harry On Tue, Jul 22, 2008 at 12:34 PM, Peter Frederick [EMAIL PROTECTED] wrote: Leaking lift pump. Peter -Original Message- From: Harry Watkins [EMAIL PROTECTED] Sent: Jul 22, 2008 12:58 PM To: Mercedes Discussion List mercedes@okiebenz.com Subject: [MBZ] OT Small diesel engine fuel problem I keep getting air at the middle injector nut during bleeding. The two outside injectors bled the air and only fuel comes out. This is a 3-cyl Mitsubishi and here is what I have tried. Replaced the delivery valve o-rings twice, once from my Harbor Freight box of o-rings, then I ordered and installed the OEM o-rings. I crack open the middle nut with the engine warm and running and the bubbles never stop. I did a hand pressure blue dye test on the fit between the fuel line and delivery valve and got a solid transfer. I placed the in-put fuel hose in a clear jug and ran the supply pump looking for bubbles and got none. It also passed the supply test of at least 8 oz in 15 seconds, which includes going through the pump filter and the main screw-on filter. I'm not sure if this is a clue or not, but I get very little return fuel. At idle I saw none, but I had left the line off during a test drive and it wet that area by the time I got back. I have ordered delivery valve springs and copper seals for my next try. Does anyone have suggestion on how a steady supply of air could get in? Thanks Harry ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT Small diesel engine fuel problem
Peter Frederick wrote: Leaking lift pump. And that would show up on only one cylinder? I was thinking delivery valve or injector. One could swap them around, see if the problem moves. Mitch. ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT Small diesel engine fuel problem
On Tue, Jul 22, 2008 at 12:43 PM, Mitch Haley [EMAIL PROTECTED] wrote: Peter Frederick wrote: Leaking lift pump. And that would show up on only one cylinder? I was thinking delivery valve or injector. One could swap them around, see if the problem moves. **I'll give the swapping out a try if the new springs and seals fail to fix it. I know I can remove the spring, seal and valve but I'll have to see about the valve seat, I don't want to mix those.** Thanks Harry Mitch. ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT Small diesel engine fuel problem
Harry Watkins wrote: **I'll give the swapping out a try if the new springs and seals fail to fix it. I know I can remove the spring, seal and valve but I'll have to see about the valve seat, I don't want to mix those.** If you have a couple of spare injector tip seals, it shouldn't take long to swap injectors, then you'll know if you need to keep messing with the pump. ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT Small diesel engine fuel problem
On Tue, Jul 22, 2008 at 3:22 PM, Mitch Haley [EMAIL PROTECTED] wrote: If you have a couple of spare injector tip seals, it shouldn't take long to swap injectors, then you'll know if you need to keep messing with the pump. ** Good point Mitch, you're right. I have the IP off now, so one at a time (between testing), I'll install the new delivery valve parts, redo the banjo fitting, try gravity feed fuel and switch injectors before going back to the pump.** Thanks Harry ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT Small diesel engine fuel problem
I think that the injector might need rebuilding. Compression from the cylinder coming back into the injector because of a problem with the nozzle not shutting or spring pressure too low. Try taking one from one of the other engines you have and use it. Shouldn't take very long to do that. Manfred Date: Tue, 22 Jul 2008 11:58:56 -0500 From: Harry Watkins [EMAIL PROTECTED] I keep getting air at the middle injector nut during bleeding. The two outside injectors bled the air and only fuel comes out. This is a 3-cyl Mitsubishi and here is what I have tried. Replaced the delivery valve o-rings twice, once from my Harbor Freight box of o-rings, then I ordered and installed the OEM o-rings. I crack open the middle nut with the engine warm and running and the bubbles never stop. I did a hand pressure blue dye test on the fit between the fuel line and delivery valve and got a solid transfer. I placed the in-put fuel hose in a clear jug and ran the supply pump looking for bubbles and got none. It also passed the supply test of at least 8 oz in 15 seconds, which includes going through the pump filter and the main screw-on filter. I'm not sure if this is a clue or not, but I get very little return fuel. At idle I saw none, but I had left the line off during a test drive and it wet that area by the time I got back. I have ordered delivery valve springs and copper seals for my next try. Does anyone have suggestion on how a steady supply of air could get in? Thanks Harry ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT Small diesel engine fuel problem
On Tue, Jul 22, 2008 at 6:32 PM, MG [EMAIL PROTECTED] wrote: I think that the injector might need rebuilding. Compression from the cylinder coming back into the injector because of a problem with the nozzle not shutting or spring pressure too low. Try taking one from one of the other engines you have and use it. Shouldn't take very long to do that. Manfred **Thanks Manfred, the other two Mitsubishi engines are a different model, K3D, this one is a an L3E, so I have no extra injectors. However, I'll follow Mitch's advice and swap two injectors and if the problem moves, your analysis will have been right. I've got everything back together for bleeding tomorrow. I would do it tonight but then I couldn't resist starting it up and waking SWMBO. That kind of thinking has kept me sleeping with my first wife for almost 52 years. Thanks Harry Date: Tue, 22 Jul 2008 11:58:56 -0500 From: Harry Watkins [EMAIL PROTECTED] I keep getting air at the middle injector nut during bleeding. The two outside injectors bled the air and only fuel comes out. This is a 3-cyl Mitsubishi and here is what I have tried. Replaced the delivery valve o-rings twice, once from my Harbor Freight box of o-rings, then I ordered and installed the OEM o-rings. I crack open the middle nut with the engine warm and running and the bubbles never stop. I did a hand pressure blue dye test on the fit between the fuel line and delivery valve and got a solid transfer. I placed the in-put fuel hose in a clear jug and ran the supply pump looking for bubbles and got none. It also passed the supply test of at least 8 oz in 15 seconds, which includes going through the pump filter and the main screw-on filter. I'm not sure if this is a clue or not, but I get very little return fuel. At idle I saw none, but I had left the line off during a test drive and it wet that area by the time I got back. I have ordered delivery valve springs and copper seals for my next try. Does anyone have suggestion on how a steady supply of air could get in? Thanks Harry ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
