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I have a thought ! Do it in order of ease if there is such a thing specialy if its an MR ! Remove the turbo hose to the after cooler so it will not build boost at all! run the engine( N/A ) See if this condition persists! This would nail it down to the head area ! then proceed to your cup theory then move on to the head gasket theory if the cups don't show up anything ! just a thought!

I know that it isn't leaking coolant anyway. how did you determine this !? just askin!

Yup dumber than a truck load of Fire wood and not even as useful !

Easier stuff first rad cap , egr cooler ! Is it throwing up any codes?

So did you dig in to this yet steeler?

Egr cooler

Inlet manifold!

No the lid would have to come off to do it correctly! If you remove just the small rear cap it would be just a look see thing!to clean out any oil ect! you can try it!

I would be checking the air pressure at the shift lid forward hose on the small cyl should be around 70 psi ! you could also as stated remove the end of the rev cyl and check for oil build up! also due to its age consider removing the shift lid and re oring the whole unit ! Not really that hard to do in a CL !

They might give you national fleet price on the Volvo lube or you can try the jobber branded stuff ! Less lubricity though ! 😁

Even thou this here is an outrages price Bro! And We all think / know that We are being gouged ! Volvo /Mack Are Not The only thieves Out there ! Nope! Don't think for one moment KW ,Pete ,freightliner ,Cat Aren't Doing the same thing ! Just imagine the gouge before it hits the dealer ! Then he has to keep his doors open! And They Really gotcha if you can't buy it a the local hardware or auto store ! The Captive stuff ! Turbos , orings , injectors . bla bala! Bend over pal ! Would you like it dri or lubricated? 😡

Ok SO My bid is 35.99 plus applicable taxes! You Need It THEY Got it ! The Sky is the limit!

Did you check the boys at the alt it maybe an actual problem! You should confirm

I believe there was an elite trim package offered back then! Usually a wood grain dash! Made of real plywood. That usually went along either the yellow! Kevin may chime in with better info for ya!😇

Are you using the Eaton Easy pedal clutch? If so the clutch needs to be set in this order ! To take advantage of the Over center nature of the easy pedal clutch you likely already know this however I will state it again ! Set the cable so the clutch brake engages RIGHT AT THE FLOOR! THE LAST 1/2 TO 1/4 inch should be CLUTCH BRAKE ONLY! Then adjust your winder inside so that you have the 1/2 inch - 9/16 Gap at the release bearing as required to achieve the necessary 1- 1/2 free pedal in the cab ! If its set this way Then ,I don't have any solutions to your problem other wise I have never ran into the 3 week issue your claiming here Fuller or Mack trans other than a bad cable! And I been at this a fair few years! just sayin!

Nope they bin doing it for yearS like this something else is causing this!

Nope put a fuller back in!

Yup this is like the Gas or electric company would say! Call Before you dig!

That auto shift still uses a clutch pedal !? Me thinks! An eighteen might be an option!

Tech BE NICE now 😂 ! If it is a mack trans it sounds like it is You could have ! A loose trans yoke bolt check that first ! if its tight the trans lid has to come off to check to see that the shift rail bolt has not come loose! Not a field fix! Chances are the range pack is worn now eitherway the trans needs the back section off it and repaired and unless you got tools for the job you can't do it inframe Trans has to come out!😒 Wild can take over from here. Poke poke jab😀 don’t worry buddy your not alone!

Thanks to BULLHEADED !!!!! Cleared it all up for us! It ALL BECOMES CLEAR NOW !!!!! SO THIS IS WHAT HAPPENED! http://www.mcall.com/business/mc-biz-mack-trucks-hagerstown-maryland-employees-find-marijuana-20191106-ukaof5x4bfhtramfzle4hd6yhm-story.html?fbclid=IwAR3k-46T2woJyx8IlU-FqaydMqMCDuO0-GK_evtsOHlYhhAky2fuLtYS6b4

check the charge air system if there is nothing odious , check the compressor hose inlet it is likely plumbed into the manifold! common failure!

Yup we needed A turbo for an MP 10 during the strike there wern't ANY anywhere ! One Dealer Had one here They managed to talk them out of it However This shit is quickly becoming Extinct too!

They were used had the sealing washers stuck to the tips! Yup saw that post guy had to be some pissed over that deal! just can’t see in coming cores being mixed in with new shit don’t understand??? How does it happen!????

Last week we had /still have a unit in the shop! 2006 c/x ! Needs injectors ! We Order 6 NEW Injectors from Mack ! Wait 4 days to get them ! Finally They come Whoho ! These come in 6 seemingly brand new Bosch Boxes! We open these Bosch boxes to find one brand new injector And 5 old and rusty injectors with the sealing washers and orings stuck to them!???? HOW DOES THIS HAPPEN! you can imagine the disappointment to the customer having to wait yet another 4 days for his unit! How do 5 old injectors get put on the new shelf ! Were They returned from a dealer trying to pull a fast one? What created this situation? Now I see why Reman injectors such AS THEY ARE come in a sealed bag! Dam it !!!! We had this situation happen years ago with a V8 Cam And a cam bushing stuck to it ! Things haven't progressed much in 30 years !