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I was looking at that the cams part the other day and I was scratching my head over it. A cam normally is just a question of lift and duration but Mack has a strange grind on their cams that causes the valve train to get loose on the back side of the lobe, i dont understand why they do that but i dont think that has anything to do with the operation of the engine brake. They even put springs on the push rods to help with keeping the noise down on the valve train and other reasons i guess. So with the cam and engine brake operation it comes back to lift and duration on the exhaust lobe right? Don’t get mad at me over this, i am just trying to understand how and why this can or can’t work.

ok

this topic brings me back to the Waterbury Mack change over when the janitor had large box full of Mack brochures going to dumpster, the pamphlets a buyer would take having different models with specifications. I know there was different models of the B's. I saved a few ==not enough. would have had in print the difference between a B61 VS B633.

Looks Like a KB 10 around the 12:20 mark.

I remember as a kid back in Illinois Meyer Materials Had B-63's and they had the 205 HP turbo 673's. I am not sure what the extra 3 is for on the B-633.

The one guy must be a DD fanatic, has a DD tatoo onhis arm. terry

Can the egr system and cooler be deleted off these engines?

I remember managing to get one from Mack, memory is hazy so I don't know 100% how far back that was (I only worked there for four years, why is it so hard to remember?!)

TamerX is where I got the last EPA04 MP7 cooler from. They were also the most reliable for the ASET AC EGR cooler too. PAI I think has it too.

It snuck out of the garage....but just the tip...😂 I was able to pick up tools, old rags and crap laying under it for the last 9 months. I hope to hang the front sheet metal on it Thursday. Waiting on one fitting for suction line of power steering. Mack did NOT have a block plug in stock so I came home last night and made my own gasket for the block heater. Just a thin little ring but I greased it up and installed it and no leaks! Of course the weather this weekend does not look conducive to racing(unless I buy rain tires). But if I can finally drive this it will all be worth it. It needs a really, really good bath. Between the old oil on everything and the greasy handprints it is pathetic looking.

Saw that video the other day.He shows the Mack Western build plate on the door.I was surprised to see a 6-71 in it not something bigger.The fame is shot but lovely truck...I want it!!!! Paul

Engine wiring harnesses and EGR mass flow /temp sensors are almost impossible to get as well. It was actually a really good engine. Still lots of them on the road in my area. The 395 HP version has more Torque than the 405 HP.

The Powerleash engine brake is only for the ASET family of engines and wasn’t even available on the first year of those engines. Jacobs was still the only option till halfway through 2004. Lots and lots of service bulletins on updating the Jacobs on the pre-ASET engines. The high volume oil pump and external oil line kit helped a lot. Putting a Powerleash brake on a pre-ASET engine might work but I know it takes a totally different camshaft profile that is only available on the ASET cams.

That's a Western R if I ever saw one. Long hood, straight aluminum frame rails, DD power. Too bad the frame is shot. Couldn't have been many with 6-71's in them.

Great points, thank you for the replies. I’m going to get new drive lines done. It looked a bit sketchy so I had to ask. I’ll feel more comfortable extending the drive shaft. Thanks

You know the body is a really good shape on that thing but the nose doesn’t look right to me. It looks like a Straight R 700 nose

Hello All, I came down the hill yesterday loaded and was not impressed, the truck ran great, lots of torque, climbing with the 18 speed is a dream but going down hill is the problem, no engine brake. I have read all the articles written on here and other places that i could find but i am not completely satisfied with the answers when it comes to the Jacob’s performance or converting the E7 to the Power Leash. I already have a set of 690 Jacob’s that have been updated and i am willing to purchase a set of Power Leash brakes to see if can be done. I would like to know the thoughts of the knowledgeable pros on this site and settle this debate and document this process.

Possibly PAI? 2007 emissions is pretty old he may be right!

RL700L !!!! don't(didn't) make um much better then that, little fluff and buff ; nice chrome stack. OK won't discuss it's not 100per cent Mack. LOL put a 865/866 in it.

i didnt see a city...bob

good points(as always) by GW ; 4 in inside yoke sounds ok BUT should the rears drop ; that 4 now becomes 2 or less . I recently did a transmission change= over on a IH ,, a real cramp!! 6 plus 2 to an 8LL. total driveshaft change over /rebuilt.

Hello everyone. I have been looking at trucks with the MP7 that has no emissions and a Mack parts guy tried talking me out of it due to the egr coolers leaking on these engines . He said the egr coolers are obsolete and no longer available from Mack. He also said the turbos are very expensive as well as other parts. Where could a egr cooler be sourced if needed?

Gess it's only my thoughts ::BUT take away their keys and proper alcohol; do they know where they slept, for me (only) a sleeping bag on God's ground works, small tent in Maine with sleeping bag next to a couple trees so moose wouldn't walk over you at night total heavenly.

can't see the city;; there are two "mountains" blocking the view!!