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Quiet a few people run fine wire plugs in the bottom of the cylinders to help combat oil fouling. Seems to help. I'm running REM37BY and still getting fouling so I'm thinking of switching too. Also there are a few reports on various forums of people getting bad plugs right out of the box...

Is it normal for plugs to foul more with new cylinders before they break in?

I'll post this just in-case someone else happens across this thread with the same question. I took a piston into the overhaul shop I used and they agreed that the instruction was not good as piston numbers are no longer stamped on pistons. The good news is that the valve pockets are...

I'm sorry I asked.

I'm installing my cylinders on the engine and the overhaul manual says to "Assemble piston on connecting rod with piston number, which is stamped on bottom of piston head, toward the front of the engine." I have 10:1 compression ratio LW11487 pistons from an HIO 360 D1A so they have the...

I was thinking because they are hydraulic lifters that the amount of valve movement will depend on how much oil they have in them. So it's a valid test to simply take the rocker covers off, pull the prop through and measure the valve lift?

Is it possible to measure the health of a cam by measuring valve lift therefore measuring how much of the cam lobe is worn of any? Can a cam be replaced by itself if it is worn or pitted? By the way, I don't think I have any problems with mine but it's a conversation I was having with a...

Just for future reference... you can get oil coming out of the manifold drain after shutdown if there is an oil leak around the exhaust or intake valves. As the engine idles it sucks oil and it can pool in the intake manifold. It then drains out of the manifold drain after shutdown.

I never said that misaligned injector nozzles could "stall the engine", unless of course you let the clutch out too fast on a hill start ;) I wrote that because there seemed to be confusion as to what the injector alignment was for. As for the mechanic being a cheat, from what I read his...

I wouldn't fire your mechanic right away. I read through all the posts as I'm chasing a similar problem and I think his trouble shooting steps were right on. The injector nozzles in a Lycoming IO-360 have an air bleed hole on one flat and an identification mark stamped on the other. When...