BOBWhite

It has the same stroke as a 3406 cat but a tad smaller bore. Doesn't look like it has a spacer plate like the cats. I'd say it wouldn't make as good of power with the intake setup the way it is, probably were developing a tip turbine intercooler system as to why the intake is pointing straight up.

Thats an average speed of about 10mph which I can see it being a dump truck and all but I'd like to see 30-40 for an on highway truck. As long as the motor looks pretty clean (the seals aren't blown out) and its not burning too much oil I wouldn't be concerned. We always dumped the airbags whenever we would unload with our Mack, but that was because they leaked a bit and when sitting in line with lots on stop and go break application the air compressor couldn't keep up at idle. Dad got stuck on the scales one time and had to wait for the air to come back up. What would be another reason to dump the airbags when dumping? I wouldn't recommend shifting with the Jake brakes either. If you're in a hurry you're in the wrong rig.

Is that the same pump that's used on the cat 3208? They look identical but I know cat prides themselves on having a self made injection system. Is the Mack pump a Bosch?

Yep almost an exact copy beside a few modifications to the oil pump and different oil gallery routing. Its crazy to me that the engine chevy designed in 1929 lasted for so long with so many different versions. It's got to be one of the most produced car engine ever manufactured, Ive seen Russian and Chinese copies of it so Im sure there's more. Brazil didn't stop making them until the early 2000s with fuel injection and all the vortec stuff on it.

There my favorite engine type for trucks. My first car was a 74 land cruiser with a straight 6 that didn't have hardly any power but so much torque and it could be lugged all the way down to idle without a sweat. In old chevy grain trucks that had the straight 6s it was amazing how those little engines could move so much especially after 50 years. Love the ford 300 inline 6 too

Bottom end knock? If not it might not have hydraulic lifters, maybe since its a 2 ton its an industrial engine without em. Im just guessing here. Also wow $3,500. Granted I don't know the body condition but I remember our old farm trucks were the cheapest C10's you could find at an auction. They were cheep and disposable got beat up and parked. Might be worth fixing now with the prices of them

I joined just about as that guy left so Ive never seen him active. The main Mh cabover guy with all the info and books on em, wish he were still around.

Do they have an electric Def pump or do they use onboard air to pressurize it like the old systems? And oops I meant 7th injector, I don't know what I was thinking

As far as I know you cannot buy from PAI directly. This web sight has all there stuff https://www.heavydutypros.com/cummins-engine-parts-engine-parts.aspx

Volvo/mack I think uses cummins DPF components so you know one DPF system you know just about all of them. Detroits are a bit different but same basic concept. I have a basic understanding of cat's and cummins system but never worked on one. Do mack's use an 8th injector or do they use the engine injectors to inject fuel into the exhaust stroke?

It seems internet forms just aren't as popular anymore. This forms my favorite so far and the community's the best and active. Smokstak used to be my favorite but all the forms are now either all politics or generator technical jargon. All the old iron people either died or stopped posting.

Welcome to the form! We've got tons of info here about the old motors but we could use more stuff of the new emissions motors. What all do you work on with the emissions motors?

Do you have a picture of that hump? I didn't know there was a difference in valve covers besides maybe an electrical terminal for the solenoid's. Maybe the 2 valve stamped steel covers had a hump but I can't say Ive seen a difference in the 4 valve cast aluminum covers. I know someone will know for sure.

The patent office says there is a BROCKWAY GLASS CONTAINER INC and a BROCKWAY PLASTIC PRODUCTS, INC so the patent for the use of the name could have expired long ago but Im not well versed in the legal mumbo jumbo. I say bring back the Superliner to the U.S but there's no chance of that now that the long nose has gone extinct.

A tip I learned but never tried is taking a torch to heat the cast iron before painting it. Tiny pores in the cast iron hold water and dirt, heating it supposably helps the paint stay on and last. The engine block has to be out and stripped down but if you're doing an out of frame restoration its worth it. Don't have to get it too hot and small parts can be baked in the oven if you're allowed to.

My favorites were the ford GAZ engine and the Twin 6-71 Detroits.

I love the Mack lettering! Dad had one with a straight 6 and a 4 speed, got good milage and could tow... slowly

We have to pick just one? lol the c10 for me

Heres stuff from a 1980 brochure: I think the tip turbine and the charge air cooler motors were produced at the same time then. Doesn't show a tip turbine 350 but I think you could get a rough idea.

Intercoolers make just as big of difference as power is how I should have worded it ; ) We used to run a 85 350 E6 mack with an intercooler right next to our 70 1693 Cat without an intercooler and man what a difference. Granted the 1693 is a glow plug engine but still you couldn't be behind that thing for a good 1/2 mile without getting choked out by the smoke. That Mack engine ran so much cleaner and the same if not more power than the old Clatterpiller.

Intercoolers make more of a difference than turbo's when it comes to power. That is if it has the tip turbine intercooler. I'm really exited to see that mack with an air starter! It'll be a showstopper for sure!

Surprised to see it still has the twin turbo setup. Most I've seen chuck the twins for a big single. Twin turbo's heat up the air too much they say.

There was a sticker on Macks (anyone have a picture of it?) that gives starting instructions that say to put the petal to the floor until the engines up to speed. John Deere engines start about how you describe by dumping a bunch of fuel into the cylinders and hoping for the best. Thats why the old ones start so violently. Macks start by retarding the injection timing and letting the piston compress the air to the max before injecting the fuel in. Macks always started really good compared to others it seemed.

Yes most block heaters are in the same spot or take the place of freeze plugs. If your engine doesn't have a block heater than you'll have to take out a freeze plug and put one in. I believe there all about the same size throughout the industry so finding one shouldn't be hard. Ive seen some other styles that take place of radiator hoses and some in the oil pan but I think the block heater works the best.