Joey Mack

I have to replace the spinner, it leak bad and its looks original, the injector harness is soaked, just outside the head, I unplugged the oil level sensor and it was dry, and the pins in the sensor socket had fully closed tips. I am glad you reminded me about the piston cooling jet control valve, I was hoping to unplug a sensor that has oil pressure on it, but I did not. and it was hard to tell if any of these were replaced, The harness looks original. The owner doesnt know much of the repair history. I want to repair this truck with a strong approach. I will be getting a price for the spinner on monday, so far we are at around $1700.00 in parts, harness, oil level sensor, and pan gasket.. I estimated about 10-12 hrs labor, I reminded them that its been over 3 years since I did one, I have done about 8 of them (in chassis) and a few with the engine out. (Sweet).. thanks for youre post, My whole goal is to just fix it right, my cust. is a small co. 3 trucks... jojo

I read it... If I had the Vaccine I would have tried it... you are right, we are not NUT'S... just real Americans who can see the B.S. that our Commie gov't. is doing... I don't know what it is like in Canada, I assume very similar... Man, I have so many opinion's on this but, I can't post them here...

in the last 8 months, I brought 3 GR104F trucks back to Mack because all of them had steering issues. they would bind up and stop turning the normal way, you had to force the steering wheel and a clunk could be felt and then it would steer. at no given time they would bind up... and you were now driving a truck with 'armstrong' steering... all 3 got new steering boxes... svc. Writer said they see this a lot..... Yaaaayy!!!! You go Volvo..... jojo

holy s#!t.... i'm sorry for youre friends loss,, There is something bigger than us, going on behind the scenes...

Non of this Kung Flu thing makes sense to me... Yes many people got sick and died... That just sucks!!!! Kung Flu added to thier existing health issues and killed them.. Yes, I am about to get my butt handed to me for saying that .... oh well.... Im sorry that your kin got sick, it suck's,, I got the Kung Flu 2/25/21. I was sick for almost all of March, I had lingering effects from it as well... for month's, Hell who know's, mabey the new A-Hole that I am is caused by it.. My issue is that our NEW Commie gov't uses this as a power grab and a tool to control U.S. Citizens... My brother-in-law died in his sleep 3 month's ago, and a Hospital rep offered my sister-in-law, $9000.00 if she said it was a Kung Flu death.. Anyway, our experience here is one of a bunch of Commie B.S. sorry for my rant, but I'm pissed...

thank you DDAY... i have seen it with the oil pan wiring plug on the MP's,, I will pay very close attention, when I replace the harness. I'm trying to get a good parts list ready for Monday, trying to beat the holiday parts slow down. My customer has been down for 3 weeks, and he only called me 3 days ago... thank you, Jojo

Hey Macks??? I started a topicthat you may be able to help me with.. Can you take a look? jojo

yep... 3 days of income loss and a $500.00 bill....... WTF?

I get those Grote tail lights at NAPA... way cheaper than Mack

I am going to replace the harness for sure... I just need to find how the oil got in so it doesnt happen again... Thanks, jojo

I was at Mack yesterday, getting prices for 4515 Q shoes and 996B drums.. $65 for shoes, $160 for a drum...., Last ones I bought this summer, was $45+$100... of course our dealer here in town doesnt have them in stock... I asked if they had disc brake pads and of course,,,,, they had 1/2 a pallet... they also want $1360.00 for an engine harness for an MP-8.. whats the real price? jojo

Hi guy's.. I'm looking at a 2009 CXU/MP-8... there is oil in the lower EECU plug (only).. I have done about 8 harness replacements, but its been s few years... I checked the oil sensor plug in the pan and its dry, I checked all of the twist lock plugs I could find and they were all dry. I did see the injector harness at the front of the head is oily, and the centrifigal oil filter housing is leaking. All of the parts on the engine look old and possibly original. (960,000 miles)....My questions are, what am I missing? and where else could the oil come from? I want to replace the sensor that is allowing the oil to enter the harness, before i put the new harness on.. but I havent found a leaking sensor yet.. Thank's Jojo

Glenn,,, I am currently building my first ENDT 673... Ive built a few E-7's and a bunch of E-tech's of all series'... I will use this post for info, because if I remember right, the push rods do not have oil holes in the ends.. so it makes sense to me, if someone would add an oiling system to keep the top lubed with an extra flow of oil... I may add this to the engine... was there any issues with too much oil being delivered to the heads, and it pushed out of the breather? Thanks Glenn, Jojo

very good... no sweat.... there are so many people here that will help you, myself included.. the truck you have is a good one. the engine you have is pretty good too. "V" had a good idea about fuel pressure... I always talk about ground wires.. so here's a small lesson... open the fuse cover on the right dash board, look at the cab frame and you will see a 10mm bolt head, its a ground, clean all of the eyelets and the frame, do the sane thing behind the instrument cluster at the bottom left corner of the cab frame is another 10mm bolt head, clean it, then go to the firewall below the left windshield and clean the ground breaker contacts. it's the black relay next to the starter relay, it has black wires going to it, the left side of the engine midway in front of the starter, is a 15/16" headed bolt, remove it and clean all the eyelets and the bolt and the block, it is a main ground, then follow the cable to the frame 1 foot away and clean the frame ground, its 15mm bolt head, its behind the steer tire... get these grounds cleaned really good, and start over, also check fuse #40 in the fuse box under the hood by the steering shaft, make sure it is clean and tight in the socket and 25-30 amps. these are some basic checks that I do even if a 9-2 code is not present... good luck, Jojo

have you checked???? ALL.... of your fluid levels?? Have you checked all of the ground connections on the truck.? hell.... is the idle shut down setting turned on? get it turned off..... or if youre in the seat, when the light comes on, tap the throttle or push the clutch once.... you may have a 5 minute shutdown setting... My guess is this is either youre first Mack, or youre first truck... No problem if it is.... Jojo

no spacer, you either dont have engine brakes or you have powerleash. the wire plug into the valvr cover on the left side's around cyl. #2 + #5.. "V" has a good point about fuel pressure.. put a gauge on the fuel outlet in the block and read it, 60-100 psi.... the wires for the engine brake run behind the water manifolds, and has a 90 degree plug end on it that plugs onto a small post that sticks out of the valve cover, or spacer depending on the engine you have.. jump up there and take a look... pics. would be helpful.. for engine brake I.D. the rough running part can be many things... More guys will comment on this, so do youre best to be specific about the symptoms,, keep in touch, jojo

the data plate is on the top of the front valve cover. is there a spacer under the valve cover?

the lower exhaust bollt are open into the pushrod bores,, when they are not sealed good or just old, they bleed oil. the engine brake wires are on the left side above the intake manifold. 2 wires total.

does it run poorly, whether the engine brake switch is on or off? just curiuos,,, is there a 2" spacer under the valve cover and the jake wire plugs into it, or is it just a valve cover and the wire plugs into it?

gosh,,,, powerleash celenoids have an o-ring in the base, when it fails it can cause the engine to run rough, same if it is not installed correctly. How familiar are you with Mack engine brake heads?

no... has there been any top end work done recently? so do you have power leash or jacobs engine brakes?

when you get the 2 digit codes, look em up, or ask us...

if the lightning bolt is on, use the cruise control buttons to retrieve the code... ?-? will be the code... ie: 8-1,,, to do it..... cruise button off, then push down on the speed button and release, and the codes will start flashing.. have a pen and paper ready first... jojo

2 engine codes with low/ open circuits,,, I dont know what 5079+5080 are... did you search the web for the answer?

Hell yeah... you got this... jojo