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if it were the griper you would think all the brakes would stick! Modulator valve comes to mind here for me! Try some brake line antifreeze !

On 2/19/2024 at 8:08 AM, Kolehamilton said:

 

Sprayed WD40 into the compressor intake and blew air into it with a shop compressor. It’s building now. 

Good job! The unloader on these used to stick common issue! You can buy a head replacement kit for the single cyl compressor!

20 hours ago, Vladislav said:

So do E9's drop a seat just after the engine shut off with no a few minutes idling before that?? Honestly dropped seat idea sends shivers up my spine relating to any vehicle. Regardless I've never experienced such "luck". BTW if it's fallen could it hang on the valve plate for some while before fracturing and meeting the piston and liner walls?

The sequince idea looks realistic. So lay outs of the same kind with car engines.

Vlad AS I mentioned the situation compounds and any number of scenarios is possible ! not sure this about other engines the 8 665 866 also had the same issue BUT it was two valve ! The seat would just come loose and make a pop pop sound when being shut down , being a bigger seat it would not break up or fall out the four valve seat was much smaller more fragile ! It is defiantly not pretty when it happens and the chain of events expensive!  

You have all the tools you need!               
man 11/8 wrench a flat blade screw driver and your thumb!

42 minutes ago, Mark T said:

I don't get this one (lol)  Haldex slacks work very well. That one's serviceable life has come to it's end. The nylon bushing is worn , you can see where the clevis was on it and it's been greased.  It even has black paint left on it.  It's just worn out, and likely had a long life already. 

I am also a an auto slack hater just an excuse for dumb ass people to not know what to do in some cases these guys are hearding  tanker bombs down the highway if they are relying on auto slacks that aren’t working they are flirting with everyone’s life!

10 minutes ago, Vladislav said:

Do you mean bad spray pattern? 

Sorry for the dumb question.

yes bro! running Bad timing can cause this to! this engine has appeared to have run low on coolant the liners are All scuffed and the  end result it took out the bottom end! Just abused ! In my opinion in order of failure>  Valve seat dropped they kept running it and then it likley cracked a liner and lost coolant and over heated kept running it GAME OVER! Seized a rod! So many things can compound when a seat drops and you keep running it If your luck you don't grenade The engine like this one! Most often when these seats dropped  it happens as your shutting the engine down it leaves just enough time for a piece to fall out  so when you go to start up next cycle your engine has a pounding knocking noise! and you Say WTF!😡

16 minutes ago, dogg rescue said:

I failed to mention, the cable is brand new. 

So if the cable is new did you replace it? Or was this done prior to you Owning it! If this truck was born with an air assist and it was removed before u owned it look for any random Capped off air line tucked up in the frame on that side! The levers on the trans and pedals have different  geometry  Shorter arm on the trans! Also the Clutch itself May be A non Easy Pedal Clutch ! Or is incorectly set!

https://www.eaton.com/us/en-us/catalog/clutches-and-brakes/easy-pedal-advantage-clutch.html#:~:text=The Eaton Easy Pedal Advantage,Contact Eaton

Above is the usual clutch used in the application with out an assist! Try stay away from a solo auto adjust if you got to replace! They tend to fill with clutch dust and cease to adjust them selves properly! 

Mark nails this one ! In my opinion ! Replace the cable ! But there is a slim chance it has an air assist in which case you may have a bad slave!

Yup injector spray will cause that !

So look at the power tower where the pump mounted! This is and 89 engine Correct ? Does the power tower have extra un used plugged off holes?  Some where in this era they were transitioning to Inline pumps and the power tower was drilled either or and plugged off accordingly to the Pump installed! they also did this on E7 when they transitioned to R Bosch!  It was only a short period of time this happened!

11 hours ago, Supermutt said:

Fred, Iam not sure how long it ran. I just picked up the engine yesterday for parts. The head looks ok so far after pulling the pieces of piston off it lol.

 Here’s a pic of the head that was on the broken piston/liner. I will continue stripping the engine tomorrow. Not sure if you saw my message I sent you on my truck and rad psi issue ? 

sorry I Didn't see your reply ! I once ran across one of these that the engine ran so long after the failure the only noticeable thing was a miss ! no banging sound! The piston was in similar condition !the peices were pounded into What was left of  the piston The picture you show there it almost looks like a cracked liner as well ! They tend to crack near the top also   

10 hours ago, Supermutt said:

Fred, Iam not sure how long it ran. I just picked up the engine yesterday for parts. The head looks ok so far after pulling the pieces of piston off it lol.

 Here’s a pic of the head that was on the broken piston/liner. I will continue stripping the engine tomorrow. Not sure if you saw my message I sent you on my truck and rad psi issue ? 

sorry I Didn't see your reply !

Did it come with a Fuel pump?????

I once ran across one of these that the engine ran so long after the failure the only noticeable thing was a miss ! no banging sound! The piston was in similar condition !the pieces were pounded into What was left of  the piston The picture you show there it almost looks like possibly a cracked liner as well ! And likely a cracked counter bore! They tend to crack near the top where the  top ring stops ! That is my concern for your running engine ! the only way I know of  to isolate this  is to remove the cross over at the rear of the water manifold and fab up some riser tubes with drain cocks on the top (  WE actually built a set of theses)  and run the engine and watch which side develops bubbles!  By the way! Did you check the head bolts on the running engine bottom corners ??? The problem with a v eight is you can't take the Water pump out of the equation like an e6 / e7 !  Makes it harder to nail down!

So the piston damage is likly due to an injector tip being ruined by seat chunks ! And run for too long after the failure! How long was it run after it started banging!?usually you can expect to replace piston liner head  injector and turbo!

Just replace!  Ain’t worth messing with!

1 hour ago, james j neiweem said:

Freightliner is set to launch a pick up. No photos yet. A classic style would be nice. Mack should make an R model pickup. I would sign up. Then again maybe not if the price is anything like an MD.

A flip hood would be nice though! How ever I’m not an md hater I am ok with it  they need to offer it with hydraulic brakes though air only it limits there ability for sales need to be able to hire cheap labour if there is such a thing these days!

well you got the miss now maybe time to swap see if it follows!

I know it’s time consuming but. Have you tried a swap?Bad ecu?

1 hour ago, Castle Trucking said:

The oil separator and crank case ventilator are the same thing aren’t they? If so I put a new one on in January.

yup sorry bad choice of words!

2 hours ago, steeler said:

Hopefully someone can offer some advise here. 

Short story is i originally replaced injectors and cups, along with engine harness. Truck ran for 700 miles then came in for injector 4 offset learning at minimum limit, and had a dead miss in #4. 

I replaced number 4 injector,truck ran great on test drive. Customer comes to pick up the truck and as soon as he starts it, dead miss in number 4 with the same offset code. 

Anybody run into this before? I've replaced hundreds of mp injectors without issue. I'm having a hard time believing I've got 2 bad injectors on the same hole. 

Did you run compression/ cylinder balance test ? Or do You assume you have a bad injector! have run into the odd bad valve!

18 minutes ago, Castle Trucking said:

I had oil coming out the blow by pipe and I changed the crank case vent. The oil leak slowed way down, but I changed the oil a week later and the next day it was leaking again. Can anyone tell me what they think the problem is? Thanks 

You need to post the engine number MP7 or 8!   You likely need to rebuild the oil separator on this or just replace it!

I'm a ''Negative Nelly'' when it comes to MP's....   Jojo

Yup Me too!

1 hour ago, h67st said:

It sure seems like having the box mounted on the axle would cause the steering shaft slip joint to wear pretty fast.

Yup ! replaced more that one in the day! And the W model was even worse!

Still think PTO how ever as Joey states Is a hard call ! That fact you hear it in neutral says something to me, Its in the main box and it only telegraphs in  direct when driving ! just my thought! Check the drain plug for chunks and get some one to double check the Ptos in my opinion! Wouldn't want to rip a trans out with out evidence!