wiserfrombud Posted May 19, 2018 Share Posted May 19, 2018 So....this is going on... both sides of expansion tank are full. Seems to be pressurizing the tank and puking it out of the overflow. I pulled an oil sample. Not burning coolant. No coolant or diesel in oil. Coolant in tank nice and clean. Truck runs perfect. Is our money on a compressor? Quote Link to comment https://www.bigmacktrucks.com/topic/53379-pressure-in-expansion-tank/ Share on other sites More sharing options...
Dirtymilkman Posted May 19, 2018 Share Posted May 19, 2018 Sounds like it's time for injector cups. Quote Link to comment https://www.bigmacktrucks.com/topic/53379-pressure-in-expansion-tank/#findComment-399068 Share on other sites More sharing options...
fjh Posted May 19, 2018 Share Posted May 19, 2018 (edited) If your not having starting issues EGR Cooler is a more common issue than compressor ! cups can still be an issue if your not paying attention! Is it doing this after a hard pull or all the time? Edited May 19, 2018 by fjh Quote Link to comment https://www.bigmacktrucks.com/topic/53379-pressure-in-expansion-tank/#findComment-399073 Share on other sites More sharing options...
wiserfrombud Posted May 19, 2018 Author Share Posted May 19, 2018 Seems random. It won't do it for a day or 2 and then boom, puke out a half gallon on the ground. EGR cooler should show elevated potassium and sodium in the oil sample. This truck being a 16 has steel injector cups right? I guess it is possible but I didn't think it was likely. Quote Link to comment https://www.bigmacktrucks.com/topic/53379-pressure-in-expansion-tank/#findComment-399086 Share on other sites More sharing options...
wiserfrombud Posted May 19, 2018 Author Share Posted May 19, 2018 9 hours ago, fjh said: If your not having starting issues EGR Cooler is a more common issue than compressor ! cups can still be an issue if your not paying attention! Is it doing this after a hard pull or all the time? It is CERTAINLY worse when workin er hard and getting it hot. Quote Link to comment https://www.bigmacktrucks.com/topic/53379-pressure-in-expansion-tank/#findComment-399092 Share on other sites More sharing options...
fjh Posted May 20, 2018 Share Posted May 20, 2018 (edited) More than likly Cups! Stainless cup Did not totally solve this issue! Another bandaid attempt! At a fix! To get them thru the warranty period! Edited May 20, 2018 by fjh Quote Link to comment https://www.bigmacktrucks.com/topic/53379-pressure-in-expansion-tank/#findComment-399101 Share on other sites More sharing options...
wiserfrombud Posted May 20, 2018 Author Share Posted May 20, 2018 I'm not disputing, just want to diagnose as best I can with the info I have. Dealership is quick to change 15 grand worth of parts when its on my dime. So cups you figure? Truck cranks 2 or 3 times and fires right up all the time. And wouldn't coolant look scuzzy if cups were bad? Or see it in the oil sample or SOMETHING!? There are no signs of anything wrong internally in the motor other then the pressure and a reputation of cups and injector issues...the truck runs phenomenal. I'd be lying if i said it didn't make nervous for a shop to be monkeying around in top end in fear of getting it back with a 2mpg loss in fuel mileage and getting the shoulder shrug from the dealer afterwards. Quote Link to comment https://www.bigmacktrucks.com/topic/53379-pressure-in-expansion-tank/#findComment-399102 Share on other sites More sharing options...
1965 Posted May 20, 2018 Share Posted May 20, 2018 I had a 12 model; no hard start, it just missed around 12 to 1,400 rpm range. I thought for awhile it was the road, didn’t miss bad & pulled good. It got where it would really pull good & then it didn’t. I knew then something wrong. Quote Link to comment https://www.bigmacktrucks.com/topic/53379-pressure-in-expansion-tank/#findComment-399103 Share on other sites More sharing options...
wiserfrombud Posted May 20, 2018 Author Share Posted May 20, 2018 43 minutes ago, 1965 said: I had a 12 model; no hard start, it just missed around 12 to 1,400 rpm range. I thought for awhile it was the road, didn’t miss bad & pulled good. It got where it would really pull good & then it didn’t. I knew then something wrong. And yours turned out to be cups? It was pressurizing the coolant tank like that? Quote Link to comment https://www.bigmacktrucks.com/topic/53379-pressure-in-expansion-tank/#findComment-399106 Share on other sites More sharing options...
1965 Posted May 20, 2018 Share Posted May 20, 2018 23 minutes ago, wiserfrombud said: And yours turned out to be cups? It was pressurizing the coolant tank like that? I’m sorry no it didn’t; I meant to say when I noticed injector problem. Most folks I was around didn’t notice till hard start. I’m thinking you have another problem cause I know from post you run at low rpm & I think you would have noticed that. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/53379-pressure-in-expansion-tank/#findComment-399108 Share on other sites More sharing options...
fjh Posted May 20, 2018 Share Posted May 20, 2018 (edited) The cup Failure thing is usually ( usually ) accompanied by HARD STARTING BUT not always . your symptom and how it is manifesting is why i am suggesting cups the under hard pull it gets worse! head gasket failures compressor failures I Am sure can happen aren't common, cup failure is better than it was .but still prevalent NOT FIXED just patched! egr cooler is still on the table as a suspect! pull the front hose and look but usually you would be throwing efficiency codes or egr related codes of some sort! Edited May 20, 2018 by fjh Quote Link to comment https://www.bigmacktrucks.com/topic/53379-pressure-in-expansion-tank/#findComment-399136 Share on other sites More sharing options...
Dirtymilkman Posted May 20, 2018 Share Posted May 20, 2018 Start with a new radiator cap or test yours Quote Link to comment https://www.bigmacktrucks.com/topic/53379-pressure-in-expansion-tank/#findComment-399141 Share on other sites More sharing options...
fjh Posted May 21, 2018 Share Posted May 21, 2018 21 hours ago, Dirtymilkman said: Start with a new radiator cap or test yours yup agree start with the cheap and easy stuff! Quote Link to comment https://www.bigmacktrucks.com/topic/53379-pressure-in-expansion-tank/#findComment-399194 Share on other sites More sharing options...
Popular Post wiserfrombud Posted May 26, 2018 Author Popular Post Share Posted May 26, 2018 And it was a pressure cap for the win! Funny how something as simple as that can cause such grief. And no trip to the dealership is complete without ALL the latest and greatest software updates! 3 Quote Link to comment https://www.bigmacktrucks.com/topic/53379-pressure-in-expansion-tank/#findComment-399447 Share on other sites More sharing options...
Dirtymilkman Posted May 26, 2018 Share Posted May 26, 2018 👍 Quote Link to comment https://www.bigmacktrucks.com/topic/53379-pressure-in-expansion-tank/#findComment-399452 Share on other sites More sharing options...
j hancock Posted May 26, 2018 Share Posted May 26, 2018 Thanks for posting your results. Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/53379-pressure-in-expansion-tank/#findComment-399478 Share on other sites More sharing options...
wiserfrombud Posted May 30, 2018 Author Share Posted May 30, 2018 Low coolant this morning......so it continues..... Quote Link to comment https://www.bigmacktrucks.com/topic/53379-pressure-in-expansion-tank/#findComment-399704 Share on other sites More sharing options...
Truck Shop Posted May 30, 2018 Share Posted May 30, 2018 Just for grins warm it up and do a block check for emissions in the cooling system. When we have coolant system pressure issues that is the first test I perform. Napa sells a kit and it works. Truck Shop Quote One ping only Link to comment https://www.bigmacktrucks.com/topic/53379-pressure-in-expansion-tank/#findComment-399716 Share on other sites More sharing options...
wiserfrombud Posted June 17, 2018 Author Share Posted June 17, 2018 Just an update. Brought the truck back to Mack for round two of diagnosis. Confirmed combustion in coolant (even though it looked fine visually) They tore into the top end. Ended up getting injectors, cups, seals, new buttons....blah blah blah.....along with a lovely bill. 6500 CAD. Those are pics of the parts. The #5 injector was actually BROKEN. Apparently it was "dancing" around in the cup and letting combustion pass. Just heading out. I sure hope with this kind of a repair, this issue is resolved. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/53379-pressure-in-expansion-tank/#findComment-400698 Share on other sites More sharing options...
wiserfrombud Posted June 18, 2018 Author Share Posted June 18, 2018 This morning the overflow side of the expansion tank is empty as it should be and I cracked the cap and there is no pressure......dare I say my problem has been resolved? I think it might be. Quote Link to comment https://www.bigmacktrucks.com/topic/53379-pressure-in-expansion-tank/#findComment-400757 Share on other sites More sharing options...
fjh Posted June 18, 2018 Share Posted June 18, 2018 (edited) 49 minutes ago, wiserfrombud said: This morning the overflow side of the expansion tank is empty as it should be and I cracked the cap and there is no pressure......dare I say my problem has been resolved? I think it might be. FOR NOW? You can repair it anytime you like / but it will never be fixed , with out Volvo admitting that they have a problem with these heads and actually Doing a TOTAL redesign of the head this will be an ongoing issue . they seem to like beating YOUR head against the wall ! AND after all, after Warranty ! Comes YOU PAY and that's what Makes EM happy! AND why build something dependable , you can't make any money that way! 👿 Edited June 18, 2018 by fjh 1 Quote Link to comment https://www.bigmacktrucks.com/topic/53379-pressure-in-expansion-tank/#findComment-400763 Share on other sites More sharing options...
wiserfrombud Posted June 19, 2018 Author Share Posted June 19, 2018 Meh. My Cummins was multiple camshafts and dropping liners, The Mack is injectors and cups. They are all shit when they are broken. As of now I would still buy another Mack. I cannot say the same for a Cummins. Quote Link to comment https://www.bigmacktrucks.com/topic/53379-pressure-in-expansion-tank/#findComment-400820 Share on other sites More sharing options...
fjh Posted June 19, 2018 Share Posted June 19, 2018 (edited) 22 hours ago, fjh said: Agree with your statement there everything has its issues! How ever we will see How many times You do the cup thing ! at 6000 a popif they nuckled down and actually redesign the heads on these the rest of the engines ARE quite strong ! Edited June 19, 2018 by fjh Quote Link to comment https://www.bigmacktrucks.com/topic/53379-pressure-in-expansion-tank/#findComment-400832 Share on other sites More sharing options...
bbigrig Posted June 19, 2018 Share Posted June 19, 2018 (edited) We had a beauty a few months ago. Had a Volvo with a D13 drop a valve seat, ordered a "factory" rebuilt head from Volvo slap it back together days later the truck comes back pushing coolant.....replaced cups on reman head...truck hasn't been back... We now joke that cups need to be done like spark plugs. Cups should be made a routine maintenance item. One mixer we have in the shop from a large customer that orders Granites annually has an MP7 that has had 2 sets of cups and injectors, usual dpf and SCR issues, has had the double idler and flywheel housing done a few years ago and now needs a reseal on the flywheel plate from the idler job years ago. They have several engines that have had the same batch of issues. Truck isn't even 7 years old. That engine hasn't had the bottom end touched yet but has cost over 30k in engine maintenance. These are 7 month a year trucks up here in useage. Imagine the cost over a fleet of them versus older mixers in the fleet. They love their DMs and RBs for a reason. Edited June 19, 2018 by bbigrig Quote Link to comment https://www.bigmacktrucks.com/topic/53379-pressure-in-expansion-tank/#findComment-400845 Share on other sites More sharing options...
Mackpro Posted June 19, 2018 Share Posted June 19, 2018 5 hours ago, bbigrig said: We had a beauty a few months ago. Had a Volvo with a D13 drop a valve seat, ordered a "factory" rebuilt head from Volvo slap it back together days later the truck comes back pushing coolant.....replaced cups on reman head...truck hasn't been back... We now joke that cups need to be done like spark plugs. Cups should be made a routine maintenance item. One mixer we have in the shop from a large customer that orders Granites annually has an MP7 that has had 2 sets of cups and injectors, usual dpf and SCR issues, has had the double idler and flywheel housing done a few years ago and now needs a reseal on the flywheel plate from the idler job years ago. They have several engines that have had the same batch of issues. Truck isn't even 7 years old. That engine hasn't had the bottom end touched yet but has cost over 30k in engine maintenance. These are 7 month a year trucks up here in useage. Imagine the cost over a fleet of them versus older mixers in the fleet. They love their DMs and RBs for a reason. Back in 2009/2010, I had finally lost all patience in working on the MP engine family and went job hunting. Got at interview at a large local Toyota dealership. They asked me why I wanted to work at Toyota. I said , " Toyota makes a great product that is very reliable and any issues are quickly corrected and it would be great to work for a corporation that truly strives to put the best product out there that they can". Then the interview guy asked " Why do you want to quit where your at?". I said " Just write down the opposite of everything I said about Toyota ." He gave me a funny look. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/53379-pressure-in-expansion-tank/#findComment-400864 Share on other sites More sharing options...
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