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Everything sounds kosher for a sick engine diagnosis. Naturally occurring issues for those years. Hopefully they made sure the breather for crank is free to breath. Never saw pressure blowing out of a front Teflon crank seal.
It seem the ANG received a new E-one unit last year but I was never around it. That side of the field is not off limits but such a pain to work in we never much went there unless called over. The front section of the photo looks similar but again I've never seen it up close.
Took me a minute to get the jist of your comment! (I'm old) I personally refuse to own a smart phone I have no need for 300 "friends" I've never met! I realize they are fascinating I also realize that the many members who are contractors have to have one (their customers expect it) but every time some idiot walks into me while talking on one or I'm in a doctor's office and every person waiting is staring at one like a zombie I long for the days when I ran several small businesses with a double entry ledger and a #2 pencil! They've already put the local bookstore out of business,libraries will be next. Ok my rant is over!
I purchased a 99 Mack E7/400 about 6 months ago and recently noticed milky sludge on the underside of the oil cap. The dip stick doesn’t show any sludge when it’s pulled. The only other place that I see sludge is on the vent tube after the wire mesh filter. I opened the mesh filter and it was all but clean no sludge there just in the tube after it. It doesn’t appear to be losing antifreeze out of the pressurized side of the tank. The reservoir side had a cracked cap and is empty. How Could it be pushing coolant into the oil but stay filled to the pressurized cap? It is winter and the temps have been ranging from 20 to 35. The truck is used on short hauls and is shut off for an hour or so during the day before making another run. Could this be condensation from the heat or blow by?