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Good on you thanks for posting the fix!

They have the Capability just not the the interest! If they did ! Would it be as tough as a Mack Design ?NOPE !Durability Is Not on the agenda these days for any manufacturer!

My suggestion is to change the oil and the thermostat 165 It is running to cold! also if the truck sits lots check the drain plug for water in the base by crackin the drain plug Also ! The filler bung will have evidence of green on it if it is coolant assuming your running coolant! If it just blow by and it runs just keep running it As stated it will run like that for a long time !

Long shot here! what model of truck is it? Ch CV ? If its a CV Go to the primary fuel filter and remove the elbow from the primary side of the fuel filter Several times We have found debris in that elbow ,we recently had one with a piece of a rag in there lines were all clear ! The indicator for this was similar symptoms checked with a gauge wacky fuel pressure ! the fuel transfer pump gear can come loose on the shaft as well also ! Just a couple of real odd places to look! There is a possibility you have a displaced H ring and a lifter hanging up or a sticky valve stem You would have likely have seen a bent push rod while doing your valve set thou! Note this unit we had also had an engine brake so accompanied by the the popping was blu white smoke it had electrical issues as well there, so its difficult to predict if this is your issue or not! Good luck

Yup read through that post the numbers you need are posted you may be pleasantly surprised

You can change to the old style manifold Depending on your truck Model CV713? RD 688 ?

You may have to pull the pump and have it rebuilt That said I was talking with my favorite fuel shop guy yesterday he says he spends two hours a day now trying to find pieces to assemble pumps of all makes of pumps! Robert Bosch and Stanadyne and Delphi parts are in short supply CAV is not a problem ! Timing markers are usually on the damper on these a pointer should be mounted on the rh side timing cover aprox ten o'clock standing in front facing the engine injection timing is dependent on year usually could be anywhere from 18-30 set the pump on its timing before you pull it may be stamped on the pump some where near the serial tags the part number you provided may indicate it may be a reman pump with x on the end ! try dropping the x while doing your search!

You must live in a dri climate or your blessed! That said in my opinion there is no one manufacturer better than the next the vehicles are built with one thing in mind sell parts after the sale ! For the most part go where you’re going to get the best service! If you drive a Pete and the dealer network is good where you travel that’s what to buy! If you want Mack and the dealer network is good buy one. just sayin

K so on the older 315 MACK engine there was a bunch Monkey motion springs and linkage behind the pump make sure that stuff, if its still there isn't binding or causing issues if its there get rid of it! Also check your throttle lever on the side of the pump for a broken spring Its spring loaded and can cause the rpm to float wildly!

Well that was my only straw I would really be interested to see what you find here! The psi drop is quite a big one! Back in the day if this were a V8 I would be looking for a cam bearing being pulled out! every once and awhile a v8 would loose 10 psi all of a sudden! The issue was the front cam bearing would work its way out and bearing would be ripped out by the counter weight! this usually happened shortly after being put into service so under warranty we were instructed to install a new bearing and keep on keepin on! never seen it happen to a six thou! And you would have found the evidence in the pan! good luck with this bud!

Yup Glen is correct! I 'm not sure of the logic behind the two piece How ever back in the late 70's early eightys they tried using them on the E6 and it didn't work out well they would break up! ! they gravitated back to single piece! They came back to it in the e7 era and it has worked out this time! one advantage is no steel ring inserts! the crown is already steel! The Mp engines have no skirt to speak of, only a small area of contact in alignment with the rod below the piston head!

Is this an inline six or V? you may have one bad injector causing this!

Swish that condition can usually be tuned out by backing the screw out a turn or so on the back of the pump where the wire goes!

If your buying new ! go where your service is going to be the best Most all makes are created equal ! All cheap wire all cheap sensors JUNK the base vehicle will be comparable! BUY lots of warranty you'll need it! My opinion

Check your throttle linkage for looseness the spring loaded em on the side maybe worn! Try putting some howes or standyne fuel conditioner in the fuel.!

Nope just a straw!

yup

what engine do you have mack gray engines have a snap ring!

Good call KT! Would there not be a ABS code coming up with this issue though?

In the original pic It appears to be Camel back suspension the chair looks to be a aftermarket replacement the torque rod set up looks correct except for the front in my mind the front bracket rod is not there that's fine for a camel back as mentioned the bracket doesn't belong there! get rid of it! or put it on the rear its a better set up than the rear one! maybe it hung up on the torque rod and bent it Either way just splitting hairs I can't fathom bending that torque rod have no explanation ! other than some superman event! 😂

don't think the the 15 speed bell housing is the the same ! may not fit the 18 speed you need an eighteen sp with the mack bell housing you will also have to alter the clutch lever and mount bracket! We have a customer with the the setup you need I will check his vin next week !

Holy crap ! I believe that is as rear torque rod that has been put in the front location ! I have had this happen twice where the parts guy looks a the drawing of the parts break down and interprets it back ward ! The impact program is a poor setup ! Very hard to navigate in some places ! this is one of those places! This doesn't explain the bend how ever Looks like the front of the diff was driven up on a huge rock or something!

We have had quite a few with shift lid issues as well there is a stop plate that breaks from time to time on one of the shift rails If its ether of these issues its not something your going to fix on your own The dealers are pretty much hardwired to this new stuff!

Being as we are grasping at straws here ! Just asking a dumb question You do have the correct amount of oil in the base ? If its over full the oil can get fluffed up and cause low oil pressure 32 litre is most common ! 52 0n ESI engine (3 oil filters) If the engine was born ESI and the Pan changed to Standard is this a possibility ? Dip stick is calibrated correctly ?

Mack Technician Is still listed too! it don't really mean much! I miss all the guys input! All good posters!