How to / DIY > Engines
HR3 engine problems
cobbadog:
I can only hope that you have a injector bench testing gauge. This tests the injector at the nominated pressure before it cracks open. With out one you are making a lot of work for yourself. They maybe simple to strip down and assemble but they must be set correctly for your engine.
I sugest that you take b oth injectors to someone who has this equipment and get them set corectly. To me it is important they are both the same and working correctly.
Bfinney87:
No I don’t depending on the cost of them setting the pressure or buying a tester I haven’t checked the injectors and have replaced one of the nozzles already. They aren’t too expensive I can get a pop tester for $100 on the internet. And I will probably go ahead and buy one. Most of my equipment is diesel anyway. If I get the leak stopped I will go from there. Hopefully this evening I can work on the pump some more. The motor has been setting probably 20 years who knows how long it was tore apart it was in a barn dismantled I paid $100 for it and it was all gummed up from setting which doesn’t help. but the engine is simple enough I will get it going. The pumps have been the biggest learning curve of it all they are a pain for someone that has never heard of a lister before But I believe I have them figured out now. Just need another good day of messing with it.
cobbadog:
Yes, you certainly will get it running again. By that added bit of information, that it sat around and is/was gummed up, should direct you to the problem and to me since your pumps are done or almost done apart from a leak, the obvious place to me is in the injector itself. Only a total strip down and clean then assembly and setting it to the correct pressure will we all know whats going on. But you have worked your way through everything else so you must be close by now.
Bfinney87:
Well I have given up on that fuel pump leak. I have taken it apart at least 20 times. Soaked it in chemtool to try and get all the carbon out. Switched around different plungers and pieces and nothing has worked. Guess I’ll order another pump..
ajaffa1:
Hi Bfinney87, the only reason that fuel will spill out of the bottom of an injector pump is that there is excessive wear in the injector element.
The element is the tiny little piston pump inside. These are so finely ground that they withstand pressures of 2000 ponds per square inch without leaking. Any ingress of water or dirt will very quickly degrade them to the point where they leak out of the bottom and won`t provide sufficient pressure to pump fuel through the injector. The telltale for a worn injector pump is that the oil level in the sump starts to rise.
Replacement elements are available, they are a lot cheaper than entire fuel pumps and can be fitted yourself provided you are a competent mechanic and are religious about cleanliness while you are doing the work. If in doubt take it to your local diesel engineer and have him do the work.
If one pump has failed the chances are the the others have also been exposed to dirt or water, flush them thoroughly to ensure they don`t suffer the same fate. Flush your fuel system, fuel lines and replace the fuel filters.
Best of luck, Bob
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