If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
|
Thread Tools | Display Modes |
#11
|
|||
|
|||
wrote in message news:d2jNd.5706$uc.321@trnddc02... Minor oil leakage seems to be a nagging problem with IO-360s. Our old engine (in an Arrow IV) always leaked some oil for the last 1000 hours before we swapped it for a factory rebuilt. (At that point, the engine was actually beyond TBO, and leakage was not a major consideration in deciding to do the engine swap.) Every year during the annual our mechanic would chase down the leaks and do what he could to minimize them. One important step was retorqueing the case bolts. At worst, our oil consumption ran about 1 qt/6 hrs, including leakage. At that rate (which included "real" oil consumption as well as leakage), we were advised that our leakage was not serious -- really more of a nuisance, so we lived with it. One thing we learned with the old engine was that leakage was MUCH worse when the oil level was above about 6.5 qts. My recommendation: Sure, go ahead and have your A&P do use whatever simple means are available to minimize leakage, but unless it gets severe (1 qt per 4-5 hrs) I wouldn't go beyond that. -Elliott Drucker That's interesting. I also read musketeer mail, a yahoo group for owners. A recent thread suggested that the IO-360 had a high burn rate for oil, and that 1qt/4hrs was not uncommon. I'm actually seeing about 5hrs now, with no leak. Should I be concerned? Adam N7966L Beech Super III |
#12
|
|||
|
|||
"Mike Rapoport" wrote in message nk.net... You might check into a "wicking sealant". I know permatex makes one, but I don't know the part number. Do it at night since it is not aircraft stuff. It has worked for me on a variety of leaks on transmissions and transaxles. Of course you need to remove the RTV and clean the area with brake cleaner first. Mike MU-2 Another issue is that RTV will degrade if exposed to too much fuel or oil. I'd remove it, clean the area, and re-seal with something like Proseal, which is a two part sealant used for fuel tanks. The stuff is incredible... KB |
#13
|
|||
|
|||
On 6-Feb-2005, "mindenpilot" wrote: I'm actually seeing about 5hrs now, with no leak. Should I be concerned? Depends. Is the consumption stable? How is the compression? Most importantly, where do you keep the oil level. If you try to keep the crankcase full (8 qts) it will go though oil like crazy. We try to keep the level between 6 and 6.5 qts. BTW, after break-in our new engine consumes about 1 qt/12-15 hrs. -- -Elliott Drucker |
#14
|
|||
|
|||
wrote in message ... On Sun, 06 Feb 2005 02:01:14 GMT, "Mike Rapoport" wrote: You might check into a "wicking sealant". I know permatex makes one, but I don't know the part number. Do it at night since it is not aircraft stuff. It has worked for me on a variety of leaks on transmissions and transaxles. Of course you need to remove the RTV and clean the area with brake cleaner first. There is a letter circulating around from TCM concerning case seam leaks. The gist of the process is remove any leaking case bolts in the area, clean thoroughly with MEK (brake cleaner would work), and apply cyanoacrylate adhesive. That's right, super glue. You hook a shop vac up to the breather, turn it on, clean things up and let dry thoroughly. Turn the vac back on, apply the glue to the seam and on the inside of the bolt holes. Let it dry, put it all back together, torque the bolts and fly the crap out of it. Had really good luck using the extremely thin hobby stuff, then painting the thicker stuff down the seam (sparingly) after the thin stuff is dry. Is an "approved" repair for TCM products, and I have used it with good results. You hit the nail on the head, it is a "wicking" leak in most cases, and a wicking sealant will stop it... Regards; TC TC, If you could forward me a copy of that letter I would appreciate it. Nobody here has heard of it. Thanks, Allen |
#15
|
|||
|
|||
On Tue, 08 Feb 2005 22:24:37 GMT, "Allen"
wrote: snip TC, If you could forward me a copy of that letter I would appreciate it. Nobody here has heard of it. Thanks, Allen The last copy I obtained is somewhere at my previous employer's shop. I got it by calling TCM tech support and asking them for it specifically. It is an old advisory letter addressing crankcase backbone leaks, does not have a SB # or anything like that. TC |
#16
|
|||
|
|||
|
#17
|
|||
|
|||
|
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
ROP masking of engine problems | Roger Long | Owning | 4 | September 27th 04 07:36 PM |
Proposals for air breathing hypersonic craft. I | Robert Clark | Military Aviation | 2 | May 26th 04 06:42 PM |
My Engine Fire!! | [email protected] | Owning | 1 | March 31st 04 01:41 PM |
Car engine FAA certified for airplane use | Cy Galley | Home Built | 10 | February 6th 04 03:03 PM |
Corky's engine choice | Corky Scott | Home Built | 39 | August 8th 03 04:29 AM |