Still have not tested yet…
I found play in my pMag and am awaiting a discussion on what “excessive” means from EMagair before testing.
I can confirm that the VGR-LC4 reamer is correct - it is .5” with a .4995 pilot section. I chose this reamer specifically for the pilot concept.
Seems to me we have a group of RV14s whose CHT seem to be in the acceptable range with this problem. I would have more info on other cylinders if I had reamed all and vow to next time. That seems like a good idea.
Maybe there is nothing that can be done to avoid this issue. Depending on who you listen to, this happens because CHT is too hot or too cold.
We could
- Cool with duct or blast tube
- Cool by changing lifter
- Change oil type
- MMO?
- Anything else?
Kiwipete is cooling by adding ducting
Keithb is increasing CHT
I am changing oil from Philips X/C 20/50 to Aeroshell W100 plus.
I will also take on playing roulette with the lifter at IR172’s suggestion - I can swap with another cylinder the next go round and see if the problem follows.
I have a crusty old timer mechanic who swears that adding MMO to the fuel is how he cures morning sickness. Anybody have experience with this?
I’ll report back on my results.