[TR] Smoke -breather or new build 'burn off'

[staffel]

David- It is well known in automotive engineering world but even more so in air cooled aviation piston engines, that internal condensation occurs (more than one would anticipate) not only from 'engine cooldown' but just from atmospheric weather/climate changes.So in the Aviation world, it is drilled into aircraft owners that if one can not fly the airplane-AT NORMAL OPERATING TEMPERATURES (Oil Temperature as indicator) per Manufacturer Specifixations for 45-60 mins MINIMUM -Dont  start it as the Condensation factor is exacerbated: contaminating (rust potential)(especially tappets & camshafts) .Now in these air cooled cylinder finned engines the monitoring of cylinder head temperatures, exhaust gas temperatures (FOR each cylinder AND TURBO INLET TEMPERATURES VS OIL TEMPERATURE IS CRITICAL FOR LONG LIFE.IN OUR Cast iron Engined Triumphs,The moisture contamination of the Oil is usually seen on the bottom of the valve cover & on the cylinder head.-it will appear as a  milky layer -especially in colder temps but can occur in summer -even in climates where 95-100 ^ daily temps is normal (Oklahoma).It is important to frequently run the engines for an hour or more, preferably  several hours at operating temperatures to 'evaporate any moisture that has accumulated  in the oil'. When this evaporation happens on a well used engine or during a breaking in of a rebuilt engine, some oil vapors will also 'appear from the breather', especuallybif the rings are not sealing well in a used engine or not yet seated in a freshly rebuilt engine.Respectfully suggest you run the engine-keeping it at operating temps as stated above. Monitor the oil pressure contrasted to coolant temperature. Operating temp usually brings a lowering of the oil pressure indication as contrasted with initial  high cold start up oil pressure and early running oil pressure. Let us know your observations.These older engines sometimes require straight weight oil to improve compression and reduce oil consumption whether burningbor evaporating vapors.  Even when my 65 Triumph TR4 was relatively young, 14,000 mi  in 1970 I used straight 50 Weight oil during the summers in Oklahoma to reduce viscosity thing in the extreme summer heat. I made alot of 100-200 mile highway  trips then at TR CAPABLE speeds and in fact reset my valve cleances per Triumph racing team recommendations for constant engine rpms between 4000 & 5000 rpms. Think it was .012 CD. .010.  This was  due to the higher cylinder head temps and related metal expansion.Point being that  Oil vapors and moisture  evaporation can be successfully  resolved  to 'safe status'. Sherman D Taffel PhDTR4 with bored rebuilt engine  now 2170cc. 87mm head gaskets.(Last rebuild 1998). Sent via the Samsung Galaxy S10, an AT&T 5G Evolution capable smartphone
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