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Update: The cam is "lapping" as it has been described. The lifter on #1 exhaust looked like it was beaten with a ball peen hammer until it cried! Some similar aspects to #3 as well. The gap tolerances were close to .300 (spec is .080 to .200) for valve gap to rocker. So the temps...

Thanks for all the great input to date.... Here is what we know as of today... 1) All egt probes were in correct alignment and distance to head of exhaust manifold 2) Compressions on #2 are low, all others are high 60 to low 70's 3) BAffeling and cooling is good 4) Issue has been...

Question: What can cause EGT's to be as much as 180-200'F difference in one cylinder to the next? Engine: 0-470-R with 700 hours in C182L One Pilot plane for past 800 hours Known facts: JPI data recorder has told us this.... 1) EGTS have risen as high as 1690 2) Fuel flow at 1600'F is 12.0 gph...