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Ya Glenn I hear ya I Don't like takin on this shit, how ever my manager is of the mind that. God hates a Coward ! Its bad enough dealing with Volvo Mack on warranty Items! We asked the owner if He would reconsider the egr transformation ask I think that when cummins Sees this head warranty will be a laugh in the face ! all six were cracked turned into a true shower head! all the cracks radiate out from the injector holes in all sorts of directions .

Unfortunately in this instance and in most instances These days the computer has slowed everything down it heeds time to update it needs time to think! so you don't get the chance to run back and forth just stand and watch! You supervise it ,so it can supervise you! Let us know what computer finds!

Well Bud saved by the Big W! Except for the week of down time searching for the problem! Actually the EGR valve check ain't to bad IF that's what it is!

Yup thanx for the site Hayseed! It does shed light on the situation a lot of his statements hold truth ! and each system design presents its own hertles for engineers ! THE venturi tube has been redesigned countless times on the MP8 they are still struggling to make it work properly! He is also correct that the Truck company s tend to keep things to them selves they really work hard on Captivating Everything! I am suspicious of the programing the guy got done here to delete this stuff as every cyl is cracked did they tweak the timing . did they tweak the turbo and so on if they just went in and told the putor to not throw a code for egr flow and washed their hands then this Is very likely the end result! I think we all have messed with this stuff a bit tried this and that I know Mack pro And I have for a fact on the grey engine It never amounted to as big a mess as this to my knowledge! In fact I had a customer that had a million on a 460 that saw my be 6 months of EGR and the truck Never faltered once ! no egr coolers failed no valves nothing! This here is volatile ! If the head is going to turn into a shower head every 1000 hours its going to be an expensive tune up every 1000 hours! i think this guy needs to rethink his direction.

AND KT500 totally dumb But we had one back in the day almost over weight with MT fuel tanks!

Don't know how many of you have these trucks CL700 with cummins isx However ! We have a fair few in my area after the death of the V8 ! the one we have in the shop now we rebuilt approx 1000 hours on the build and we are working on the second reman head that has cracked is there any one here had experiences with these and any thoughts on WHY! other than it being a cummins ! WHY Are these heads cracking the cracks are at the injector holes out and between the valves! the EGR Has been Deleted dont know if this is causing too much heat ? Should we be replacing the injectors? are we setting the injector to tight? JUST seeking input! Experiences Please!! If any! Thanx

milkman did you resolve this yet? unfortunately with out the vcads program your running half blind!

Have you owned the truck since new ? Has this problem come about or is it an inherited problem I guess Im asking!

Possibly the egr valve is stuck open or turbo stuck try giving the valve a tap

Merry xmas ! ANY Codes!?

you should not SEE Smoke Of any kind! DPF should be collecting it you may have a crack in the dpf!

depending on the year and fuel pump there were two timing pointers the rob bosch pump had a different pointer for timing and valve set pointer

AC 460 pulled b trains for ever with this till now! That's likely why!

Yup its pushing the note a tad! We just had long time customer show up yesterday with a leak behind the compressor gasket leak RIGHT ! NOT !!! Cracked a block ! Kinda sad he has spent good money this year rebuilding an engine just to have the block give out!

so if the screen issue don't conclude this saga ! Next To find leak on head gasket ! Try this. drain coolant to just below thermostat level remove water pump belt and stats fill the housing to stat level run the engine and watch for bubbles If the bubbles come from the back it can still be the compressor from the front its obvious what to do!

Now As for the coolant filter we once had one of these and it was low liner protrusion same symptoms YOU HAVE rad cracking AND WOULD BLOW THE FILTER OFF Last resort thought! throws up a red flag for me! check the screen if its not there your going on a head trip in my opinion!

Your welcome 🙏 good luck with your issue keep us posted on the progress

GREEN WTF ? Does the engine have two heads or one big head the MP engine will have MP7 or MP8 on the intake manifold RED engine THE E7 will likely be painted GREY with two valve covers ,How ever if you are color blind it could be brown or pink or yellow or painted intentionally a different color ! If so identifiable by two valve covers! Gray check the screen at the cooler pipe Red possible injector cup issue! as you have checked the EGR cooler!

Injector cups!!!!

Intake screen at the oil cooler pluged?these have caused a lot of greef at times

Yup agree with Trent fairly normal however if you find that temp is coming on faster than normal could be you have a boost leak!

Settings need to be enabled in the software not really reprogramed but changed!

yup high on the list of suspects!

By the way those sols are available THRU PAI ! not totally extinct yet!