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6.6 duramax coolant/antifreeze leak at rear of engine (parts links in description⬇️) grub 'n gas 7.85k subscribers subscribe I popped the hood and noticed that i was fairly low on coolant I expect the coolant was only leaking when the system was under pressure, and once turned off and the pressure dropped, the leak stopped
The egr unit was ordered and replaced today It then overheated a few days later while idling in the parking lot at work I apologize, no pictures to supplement this post, but i thought it might help someone in the future if they experience a troublesome slow coolant leak.
There are a couple of places that coolant leaks are known
One is the water pump itself and the other is the actual radiator itself Check this video out, the mechanic works for a dealership so he sees different issues along the way 2023 sierra denali lz0 3.0 standard bed in pacific blue Replaced 2018 chev colorado 2.8l lwn diesel long bed.
If thats the case, the one on the passenger side under the egr cooler thats a 90* turn is probably about to go and the one just behind the fan pulley on the top of it is about to go I have the dreaded 3.0 coolant smell from the passenger side of the truck The other day i pressurized the cooling system to see if i could find the leak Coolant leak on 2.8 duramax 1 reading jump to latest 9k views 18 replies 7 participants last post by fjm568 dec 28, 2023
Welded flange leaking on the exhaust gas recirculation (egr) coolant return pipe
Refer to call out #1 in the above picture. 07 lbz, truck is absolutely vomiting coolant on the rear of the engine on the drivers side Did some research and looked into it Seems like it is the 90.
Had my 2016 duramax z71 since november of 2019 Last summer (probably around july) i had my truck throw a code for the fan clutch assembly
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