Mack Technician

I just took the challenge and installed my pic. Heads up to anyone who wants to "off" me for loving Mack... I carry.

Use OE Mack, they are cheap. The Volvo OE oil filters I use are cheaper than NAPA (w/corporate discounts incl).

Lol.... WHAT! The historical revisionists are rolling Mack?

It's a noble experiment, I'm sure there are a lot of good trucks out there. Glad you picked a Mack!

Thanks for the encouragement! I always watched (and sometimes used) this sight, but never hopped on till the Log Dog came to town. Wanted to contribute something instead of just being a consumer of info. Good crew of folks really, all fights aside. On the E6 they didn't seal the tach drive gear. Operators with sloppy engines would come in complaining of a leak at that spot. The engine crank pressure would be driving motor oil out the tach drive and it was generally unfixable. A good indicator of trouble coming. Manometer blow was usually high on these units. Seems like a farm tool, but we had one at the shop that was made by a tool vendor. Was molded and had a steel center with ascending and descending increments.

You have to read at full govern and load. Have a partner in the cab interpreting. Our group expected Mack E7 to stay under 6" or we would be putting sleeves in. On the 80's engines you just look at the worm for your tach-out..LOL if you can't make the oil leak stop your crank is supercharged!!!!

Seems quirky, but no, don't plug anything. Plugging would blow the water out. If you are drafting the engine back into intake remove and let hang to atmosphere......otherwise you are negative pressure.

If I was building a puller and running the engine(V8 or straight6) RPM/torque/HP way over stock.........I wouldn't be sitting over the engine heads in a cab over. You want all the engine heads pointing at God, he can handle it. Also assume your fire is going to occur in the engine compartment. You may want to be behind the fire rather than above it, things can get crazy with that kind of power. You envision the door flying open and a quick 10 foot leap to safety, in reality they may be trying to extract you from that height. In 2012 we had an older operator suffer a massive heart attack in the seat of a large front loader, the hardest part was getting enough mechanics and staff to manually lower him 10 feet safely to the ground for CPR. Dead before we could get him to the shop floor.

Build a poor man's manometer to tap into the oil dipstick. Find a clear piece of clear milk line that clamps over the dipstick, cut 14' feet of it. Make two vertical columns with a loop at the bottom with the top of one column hooked onto the oil dipstick and the other open to air then loosely U-staple the u-shaped line to a 3 foot piece of 2X6 board and mount it in the cab. Fill the loop half full with water and food coloring. Have your buddy measure the inch spread under load to check your blowby. Should be 6" spread or less for a tight motor. Pull tractor should have a loose engine anyway. Check with an oil sample instead to see base metal condition. Loose piston engines do well for pulling and modifying. The best pull tractors we have around here won't even start without ether during summer months. Pistons swell over per heat. When you atomize water and soluble oil solution into the intake for piston cooling it will tighten everything right up and compression goes through the roof.

All a good argument for a scatter blanket.

Go to the book. Not something easily described. You also need a couple specialty tools.

Safe guess you are torqueing past spec a bit?

Complete loss, no salvage except accessories. They put too small a turbo on this dual turbo Inter 4 engine. The seal blows and dumps a mass flow of oil into the engine intake. Hydro fracture separates the sleeve crown and now you have a "jake brake". Funny thing is there was no run-away on oil feed, engine wasn't over revved. Two years ago I did an in chassis two cylinder rebuild on the inter 3 version of this motor for hydro-fracture. A hydraulic pump seal failed and filled the engine till oil came out the crank recirculation and right into the engine intake. Sheared the piston rings off the piston on #1, damaged #2, but sleeve remained. Guess it is a matter of how much oil hits the engine cylinder and how fast the event occurs? This cylinder was opposite the inlet side of the intake manifold. We all agreed buying extended warranty on a new production engine was a good idea. It paid off, 3 years/ 10,000 hours coverage(so we are seeing the lighter side). This is the fourth machine to do this out of our dealership's loop. Pic of the intake grid.

So we can't hang 41 according to Volvo rules?? Doggonit, Things just got lame.

Guy said it sounded like a jake brake. Engine has no jakes.

I'm passing the moderator a cold beer out the window, saying thank you and closing the tavern window, breathing a sigh of relief that new knucklehead passed easily through the window jamb. Nice throw 41. I ring the drink bell and lay down a $50.

4,840 hours. Not Mack. 4 cylinder diesel out of a rolling excavator.

On the bright side we have very good wear return on the cylinder hatching.

Today I saw the worst engine failure I have seen on a stock engine. The Sleeve hydraulically split from it's top land, dropped down the rod and was rapidly disintegrated against the cam and engine interior walls.

If "Odds and Ends" was the name of a tavern lots of folks would leave through the window.

Nothing Feeble about the original group. A country the size of Wisconsin over running a large swath of the continent. Think a lot of youth are foolishly attracted to the idea of power and conquering might associated with Nazi Germany. The only thing keeping Europe safe right now is good availability of beer in Germany.

See, I don't even want to run you over with my car. I liberals... for bearing the image of God (but not a whole lot more).

Low complexity issue. America = Know God, Know Peace / No God, No Peace.

When I was young and single, w/o children, I use to moonlight engine rebuilds for folks that fell outside of our dealerships customer base footprint. $1,000 labor (cash) plus aftermarket parts kit( $1,400 - $2,000).

Stuff like this can drive people to murder....or worse....a Freightliner! The frags are going to be hung in the lifter ports. All oil that leaves the deck goes through a roller lifter oil port before reaching sump. The good news is all lifter ports are usually semi-congested with disintegrating valve rotator spring debris at half life anyway. Perfectly survivable. I'd pull the tubes, run the lifter up to top travel and fiddle it with a magnet.