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Charles, thanks for the feedback. I believe the carburetor was my main issue. It just took time to narrow the options. My L5 has spent more time in the shop than in the air recently. During the trouble shooting of the heat issue, one of the new chrome cylinders was dripping oil after a test flight and it appeared to have a crack so it was replaced with one of my spares. It ran hot on that test flight so the new carb was installed for the next flight with the new cylinder and it ran 95C. That was a major improvement. After the test flight with new carb the “slobber tube” was dripping oil more than the AI thought it should and he suggested we swap out the 60LB cylinder. That was a good move, there were grooves worn in the cylinder wall allowing blowby. Next flight to break in the second cylinder temp only went to 87C and there was no slobber on return. We are now installing the Airwolf oil filter kit and I hope to have it home this coming week if the hoses show up. AI still wants to add a larger lip at the bottom of cowl.
John
Continuing the heat issue. Put new carb on engine and it made a difference. It is running richer and you can lean to peak on the ground and in the air. Oil temp stayed below redline but was 95C on a 90F day. AI is suggesting increasing the lip on the lower cowl to create more airflow. Looking at L5 pictures on the internet, I see there are several with the increased lip. My question is, does it make the difference or is it wasted time?
Thanks for any input,
John
Steve,
I have a spare. Bought it from a repair shop 2 years ago when it looked like mine was DOA. Mine wound up getting repaired and I never unwrapped this one, it is the cabinet waiting for the need. If you want to get it and replace with yours when repaired or return it when you get yours back is fine with me. John
Sam,
The issue I was and possibly am still having is intermittently running hot. Fly in the morning and oil temp is good, fly in the afternoon and it red lines, fly the next day and for the next week the temps are good then the next time it runs hot. I sent the vernatherm in to be tested and repaired and on the test flight it ran hot. I then went to the low pressure relief valve. I have 2 other O-435s and pulled the valves from them to compare with the one in my L5. I miked the cup and plungers to find the least worn to put back in the L5 and selected what I felt was the stronger spring. In hindsight that was the wrong selection. After reinstalling, I have flown nearly 30 hours with no problems and suddenly it started again. I have pulled the valve, cleaned and reinstalled, but have not had the opportunity to fly. I have been reading and studying the overhaul manual and the internet and figured out the flow of oil. I’m hopeful the cleaning will lower my temp. What I would like to do is figure out a method to test the 3 springs I have to determine which has the least tension, thereby allowing more oil to flow to the cooler and hopefully soon the Airwolf filter adapter.
John
Bill,
I talked with Mark Elgin at Airwolf. Very helpful and patient, looking thru their product line. I sent pics of the O-435-1 oil probe assembly and he sent pics of the adaptor that inserts in it’s place and the filter mounts directly to the sump, but it won’t work on the L5 because engine mount would not clear the filter. If it turned 90 it might or if they had hose connections to run to remote filter mount. IF IF IF. They don’t have that adaptor, so the only way is to put it in line with the oil cooler.
John
FYI–Just got off the phone with Mark at Airwolf. Sam you are right, the adaptor supplied will not work. They do have an adaptor that will work on the O-435-1, just not on the L5 because the engine mount cross brace is in the way. So, we are exchanging the 007A kit for 007D if I remember correctly and it will be placed in the oil cooler circuit. I will post pics when we gitter done.
JG
Sam, The instructions are apparently generic and do not mention interupting the oil cooler line and inserting the filter. I see how that would solve the problem, but I’ve paid some Benjamins for this adaptor they say fits the O435. The instructions say remove screen and oil temp probe and put the probe into the adaptor with hoses going from port 1 on adapter to port 1 on filter assembly and so on with port 2. I will call Monday to clarify how to do it.
In sort of the same vane, I’m having heating problems again. I thought changing the oil/cooler bypass valve had solved it. No problems in 30 hours, now it’s happening again. Reading on the internet and studying the overhaul manual, I see 2 valves. The oil bypass near the front of the engine and oil/cooler bypass under the sump. From what I have read, others have experienced this and modified the springs. Lowering spring tension on the oil/cooler bypass diverts more oil to the cooler and lowers oil pressure and increasing tension on oil bypass increases oil pressure thereby increasing the bypass to the cooler. Am I reading and figuring this correctly? My pressure runs between 70 and 75 now.
John
Ok, someone help me with the Airwolf install. I received the package with the AFC-K007-A adaptor but it does not look correct. My understanding is, it replaces the temp probe housing. The problem I see is the adaptor has a different bolt pattern than the temp probe. Am I thinking wrong or did they send the wrong adaptor?
John
Steve,
Here is John Seidts contact info if you opt for a replacement
Forgotten Field Aviation Technical CenterHangar 19441409 Diffendall RoadEssex, Maryland 21221For parts inquiries or Aircraft informationTelephone:443-250-9037
John
Steve,
If you have a cigarette lighter outlet for your iPad or other devices, look for a dual charger with volt/amp readout. They are $10-15 and when you power up they show the battery voltage and when you advance the throttle the voltage with go up to 14 showing the generator is working. My amp meter doesnt move enough to tell the generator is working but the little charger shows the advancing voltage of the generator.
As far as getting a generator repaired, mine needed a new armature and I will have to get the paper work to see where I sent it. Seems like a shop in Kentucky. I will check.
John
