Quote:
Originally Posted by BillL
Heat is also an unseen factor here, as we would not know the temperature at the guide. So, the root cause could be something as obscure as low lube flow to the rocker box resulting in higher temps and lower lubrication.
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Or something less obscure......
This is what I was worried about when I inspected my new ECI power assemblies delivered back in Feb.
Titan engine cylinder assembly - unboxing no audio:
http://youtu.be/-6yreZzL3bw
I was told I was over thinking it.... Just bang it on, basic back ground in thermodynamics and fluid mechanics made me think ok yep not going to be optimal but no one else seamed to care or look closely enough at the situation. Basic research found similar prob seen with Porche air cooled enginges with ****ty finishing on inter valve cooling fin Flashing.
Perhaps hardened guides = more stem vs guide wear on ECIs Vs Lycomings with poor finishing? My best gueess....
Definitely read Bills report third link below...
Richard you've just conviced me my Eci cylinders are going to get a file job, i was a bit dissapointed when I saw ECIs sloppy finishing in this area area... There is an entire air passage missing/blanked off that the 2300 HR lycoming cylinders that I pulled off which had no operational valve issues.
It would be interesting to measure them up and see how much wear they have.
https://groups.yahoo.com/neo/groups/...messages/17408
http://showcase.netins.net/web/gregs...20problems.htm
http://showcase.netins.net/web/gregs...ing%20memo.pdf