Here is a link to a drilled and pressure lubricated cam system that is STC'd for lycomings. (just in case the roller lifters are not an option for your cases.)
http://thenewfirewallforward.com/tnfwf_2012-2013_new_007.htm
Interesting. Especially after skimming through this long winded article
http://occonline.occ.cccd.edu/online/rfoster/The Rest of the Story- Valve Lifters and Tappets.PDF
It's scary what you find googling lycoming tappet failure
Erich
Dan,Kevin, when you get those tappets out, check the part numbers for 15B26064.
Dan,
What's the story on the 15B26064 tappets? I see that Lycoming SI-1543 calls for their replacement, which certainly hints at a significant number of in-service issues. Assuming that Aerosport complied with this SI after my first cam/tappet issue, I shouldn't have any of those in my engine.
Interesting. Especially after skimming through this long winded article
http://occonline.occ.cccd.edu/online/rfoster/The Rest of the Story- Valve Lifters and Tappets.PDF
It's scary what you find googling lycoming tappet failure
Erich
That is a very interesting article. Can anyone point to a follow-up that may have been published? Looks like that article was originally printed in or before 2004. Any further information generated in the subsequent twelve years should be of great interest.
Try this:
www.secure4host.net/.../LycomingValveBillScottDiscussion2013-08.pdf
Google the two names to find more references.
Ed
I saw some old info from Lycoming when they first started offering roller lifters that said that they could mod cases to add these to engines in the field, but I don't know if that panned out or not.
Wow Kevein - ugly isn't a strong enough word for that tappet face! Even the "ridiculously beat up" examples at Lycoming school didn't look that bad.
Is this a first-run engine, or was it built up as an overhaul? If its first run, there has been something going on in there that wasn't right in the first place.
Paul