Nigel Thanks for update. In past I have used brown tacky aviation sealant. I have also used a staple from office staple machine and hooked it into cork seal then around edge of tappet cover - it stops it slipping down and you put in place. The lesson to all from this is always do a quick circuit after cover removal just to be sure.
Also Nigel what is the recommended method to clean those new Limbach plugs. In past with Pawnee I used oven cleaner overnight then washed with water then metho to dry out water. Plugs are as good as new. The L2000EA is now 140hrs without even adjusting tappets. I now have "Mixture control" on Limbach - full power CHT <170deg C and stable but bring throttle back say 15mm (no real drop in revs) up goes temp to 190 deg C and beyond. Still have problems with too low oil temp (that oil cooler on underside of cowl with a lip works far too well - works hugely better than on top of engine in usual spot - I blame Limbach as they supplied oil cooler) so looking forward to inland Qld to warm up the oil a bit. Hey Nigel how are the Waikerie floods - anything like the 1974 world comps (see Zulo Romeo Good Start) the only thing then out of water was the highway 30km east of Waikerie. Ian M On 14 September 2010 23:58, Nigel Baker <[email protected]> wrote: > Hi All. > Yep been there done that. > Had a problem a while back where the gasket leaked and the oil ended up > dropping into the cabin heat valve and running back into the heater box > overnight while parked on uneven ground. > Made for a very short circuit the next morning when I attempted to fly > home. > Wisps of smoke in the cockpit. What fun. > This happened about 15 hours after the previous 25 hourly!! > When I removed the rocker cover and looked at the gasket I could see a > series of impressions in it from the joint to the head. Looked like every > time the engine heated and cooled the gasket slipped up a bit more. It was a > fresh gasket at the previous 25 hourly. > > Limbach use sealant on this gasket on new engines. Anyone on the list who > has had a shortblock changeover will know that the first time they pulled > the covers off for a service the gasket was glued on with a brown substance. > While the manual doesn't tell you to do this it is standard Limbach > practice. > The product is from "Elring" and the name is Curil (labeled sealant > compound). > It is NOT a Silicone Product. > It is applied to the Rocker Cover and the gasket set into place. It is a > thin smear but enough to cover the face. Place the gasket in position and > press it down all round to mate with the sealing face of the cover. It will > cure over night but I find it is firm enough after a few hours to fit the > cover on and this beds it in without the risk of it slipping. Once set you > can remove the cover and check it is located properly. > At 120 hours I haven't changed the gasket yet and it still seals just fine. > I expect next service I will have to change the gasket. This requires > scraping the "Curil" off and doing the routine again but it is not a very > arduous a task. The reliability of the sealing joint is worth the effort. > The reason Limbach use Curil is for the very reason Rob has raised. > > The 3 sealants used by Limbach are. > > Hylomar Dauerplastische for sealing of Crankcase halves (no interest to > most of you). > Wacker Elastosil RTV-1 for the Oil Pump, Fuel Pump and Cylinder/Crankcase > Joint etc. > Curil for the Rocker Covers as mentioned. > > Hylomer Universal Sealant (blue) doesn't dry out and stays flexible and > impervious to Oil hence used in the Crankcase Joint which is prone to > movement in the joint (thermal expansion etc). > > The Elastosil is a High Temp Silicone Rubber (black). It doesn't like > direct exposure to Fuel but is fine with Oil. It is easily removed with > petrol or acetone and works well in the places mentioned. It is very > different to the Silicone products I am used to. I have a tube 3 years old I > am still using and yes it still comes out of the neck of the tube. It > doesn't dry out in the tube like every tube of Silicone I have bought > before. > > Cheers. > Nige. > > > > > ----- Original Message ----- > *From:* Rob Thompson <[email protected]> > *To:* [email protected] > *Sent:* Tuesday, September 14, 2010 6:02 PM > *Subject:* [DOG mailing list] VW motor rocker cover gasket leaks > > G'day All, > Just wanted to remind everybody how easy it is with VW derivative > motors to put on the rocker cover and not have the gasket lined up and > seating properly. > I've put the rocker covers on a zillion times over 20 years and have > always made sure the gasket isn't bowing inwards but yet today the gasket > still slipped inwards as I was installing it resulting in quite a > significant oil leak....Fortunately we were just doing an engine run after > the form 2 inspection and all it meant was a clean up. > My recommendation.....Every time you put on the rocker covers do a run > up and then get out and have a look. > cheers > Rob > > > PO Box 129, > Lawson, NSW, 2783. > phone 02 47592307 > fax 02 47050312 > mobile 0429 493828 > > > > > > > > > > > > > > > > > > > > > > > > > > ............................................. > > > ------------------------------ > *From:* Ian Mc Phee <[email protected]> > *To:* [email protected] > *Sent:* Tue, 10 August, 2010 8:53:48 AM > *Subject:* Re: [DOG mailing list] Recommendations when changing the rear > window? > > Most repairers use flock and resin but do know Streifender in Germany do > have another product which they sometimes use. There are some good links in > EAA site or was it kitplanes to fitting canopys but take real care with any > holes you may drill - i am inexperienced so I always use round head screws > with large washers and I remove screws just before resin goes off and then > replace (if necessary) with countersunk ss screws but perspex holes should > always be rattle fit with the screw you use. Have heaps of masking tape > around the place. There is a scotch product which you spray on canopy and > remove like a rubber skin after fitting- protects window > > Nigel may have ideas and a different version > * > * > *I would love to hear form others on SPEED vs RPM vs fuel consumption* > > **Take you time and think first re canopy > > Ian M > > > > On 10 August 2010 02:13, Lasse Schmidt <[email protected]> wrote: > >> Hi all! >> >> We are going to replace our cracked rear window tomorrow. >> Does any of you have any tips about this little project? What glue is >> suitable for this? >> >> BTW, just a little survey - what cruise speed do you guys get at 2500 rpm >> with two persons onboard? >> >> Cheers Lasse >> --------------------------------------------------------------------- >> You are subscribed to the Dimona Owners Group mailing list. >> To unsubscribe, send email to: [email protected] >> >> > > > >
