Hi, I have just had my engine rebuilt and I'm running it in. Does anyone know what this is under the oil filler
Normally occurs when an engine never really gets hot. Wipe it out and take it for a long run, see if it comes back.
Yeah prob just condensation build up emulsifying in the oil, if your doing short runs whilst running it in its understandable. As above, clean and monitor.
if the person that rebuilt your engine steam cleaned or vapour blasted any parts water will be involved microscopic molecules will build up in the microscopic nooks and crannies. first couple of uses these evaporate and then condense on the coolest part, the oil filler cap along with some oil hence the emulsion that you have. not an issue
It's nothing to worry about - just emulsified oil fumes. Clean it off and take the van for a good run.
bugger - the only mech tech question i could ever answer with any certainty and i get here too late *harrumph* it's 'mayo' - caused by condensation and oil mixing. (said it anyhoo!)
If its an original oil filler with the drain tube that drops through the tinware it normally doesent occur as the water condensate drips out of the drain tube The straight alloy oil fillers stop the crankcase breathing properly as the internal diameter of the breather connection is too small It will also force oil out from the crank pulley
Interesting paradox, I have noticed slight oil marks on my shiny chrome bottom pulley. Will have a better look at the weekend.
He just told me not to go over 50! I have been driving it reasonably normally but obviously not revving the nuts off it and not going too fast.
