Onyx610 Posted September 17, 2022 Share Posted September 17, 2022 Possible head gasket? I know the Cummins nt855s used to squeal or chirp when the head gasket went or head bolts stretched. They were seperate heads like Mack’s and not a slab head. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/page/3/#findComment-509636 Share on other sites More sharing options...
Onyx610 Posted September 17, 2022 Share Posted September 17, 2022 Do a coolant pressure test tomorrow and really look for any visible leaks. If you do not find any it’s time for a compression test…. Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/page/3/#findComment-509637 Share on other sites More sharing options...
Joey Mack Posted September 17, 2022 Share Posted September 17, 2022 so its an ASET-C... lots of places to loose coolant.. head gasket is surely possible Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/page/3/#findComment-509639 Share on other sites More sharing options...
Jlam Posted September 17, 2022 Author Share Posted September 17, 2022 (edited) 20 hours ago, Joey Mack said: what color is the exhaust? The inside of the pipe is black but sometimes blows white smoke & stutters when I take off from a stop, usually around 4th gear. Edited September 17, 2022 by Jlam Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/page/3/#findComment-509677 Share on other sites More sharing options...
Joey Mack Posted September 17, 2022 Share Posted September 17, 2022 white smoke is coolant, typically... is the egr cooler bad? Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/page/3/#findComment-509678 Share on other sites More sharing options...
Jlam Posted September 17, 2022 Author Share Posted September 17, 2022 8 minutes ago, Joey Mack said: white smoke is coolant, typically... is the egr cooler bad? It’s not leaking or anything so not that I know of but I blocked the egr off now Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/page/3/#findComment-509679 Share on other sites More sharing options...
Joey Mack Posted September 17, 2022 Share Posted September 17, 2022 so you dont see any stripes of burnt coolant on the engine block.. pinkish whiteish streaks? unless you are using green or yellow coolant.. you still would see streaks of burnt/dried coolant.. Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/page/3/#findComment-509680 Share on other sites More sharing options...
Jlam Posted September 18, 2022 Author Share Posted September 18, 2022 3 hours ago, Joey Mack said: so you dont see any stripes of burnt coolant on the engine block.. pinkish whiteish streaks? unless you are using green or yellow coolant.. you still would see streaks of burnt/dried coolant.. no streaks anywhere. It’s the weirdest thing but when I had the exhaust manifold off the injectors all had a white coating on them of something, is this normal? Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/page/3/#findComment-509689 Share on other sites More sharing options...
Onyx610 Posted September 18, 2022 Share Posted September 18, 2022 (edited) 17 minutes ago, Jlam said: no streaks anywhere. It’s the weirdest thing but when I had the exhaust manifold off the injectors all had a white coating on them of something, is this normal? Haha, no…How could you see the injectors with the manifold off? Edited September 18, 2022 by Onyx610 Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/page/3/#findComment-509692 Share on other sites More sharing options...
Onyx610 Posted September 18, 2022 Share Posted September 18, 2022 Oh you mean the injector tubes Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/page/3/#findComment-509693 Share on other sites More sharing options...
Jlam Posted September 19, 2022 Author Share Posted September 19, 2022 Pressure tested the system & boy there is a few leaks but on is a pretty decent one, gonna find it tomorrow. IMG_7642.MOV 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/page/3/#findComment-509803 Share on other sites More sharing options...
Onyx610 Posted September 19, 2022 Share Posted September 19, 2022 Good leak haha, let use know what you find Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/page/3/#findComment-509804 Share on other sites More sharing options...
Jlam Posted September 25, 2022 Author Share Posted September 25, 2022 On 9/18/2022 at 9:35 PM, Onyx610 said: Good leak haha, let use know what you find It was a bunch of hose clamps that were loose & the radiator cap needs to be replaced, besides that we’re good now on coolant 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/page/3/#findComment-510304 Share on other sites More sharing options...
Joey Mack Posted September 25, 2022 Share Posted September 25, 2022 you dodged a bullet there.... jojo Quote Link to comment https://www.bigmacktrucks.com/topic/70394-mack-aset-427/page/3/#findComment-510305 Share on other sites More sharing options...
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