Does your Duramax truck seem to not heat up? A lot of times this problem is caused by worn out thermostats. In this video we explain the causes and effects of worn thermostats and then show how to replace them.
In this case, we are working on a 2005 LLY Duramax but the procedure to replace the thermostats is similar on other years.
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Can you link the new radiator o ring? What size is it if I ask auto zone
Is the belt tensioner 1/2 or 3/8 drive?
Curious – Does the LML not use an O-Ring on the metal upper coolant pipe? Your kit for 2011-2016 (SKU 10513) says it includes the 2 T-Stats, and an O-Ring for the Oil Fill Tube. No mention of the one for the hard pipe that connects to the T-Stat Housing. I looked through all of your Cooling System parts for the LML, and no such O-Ring is listed. Just wanting to make sure I order everything I need for the job. Thank you.
Not sure why they call for removing the AC compressor. It doesn't have to be taken off to change the thermostats. I just changed them on a 2007 classic 2500HD. The oil filler neck does, and the bolt that hold the hose down, and the electrical plugs. Other than that it isn't bad at all.
Excellent Video! would love to see a video of the same job but in a Chevrolet Express with the Duramax. It seems way more difficult and I can't seem to find a video on it.
Will this work the same for LMM ?
The best how to for changing these thermostats I've seen. Thanks very much.
This video is a bit confusing and why do you need to take off the oil holder and take off the belt?
Thanks for a very well done video,very helpful.
Wish it was that easy on the 2009 hd
Awesome video takes the worry out of thinking I can't do this myself , I'm totally not afraid to attempt this on my own thanx so much for taking the time to make this
Great video, best description, tech info and tips .. keep it up
Great video . Simple and to the point!
I just did mine, and while this is one way the other way was just as easy if not easier https://www.youtube.com/watch?v=75oAX-w-JGE&lc=z22yevb4bvrbwbttracdp434vyk1sjy025t2ts235ipw03c010c
Man either you’re missing some parts or I just suck cuz that was more difficult than you guys made it look lol
helpful. got me started. I did not have to move the A/C or remove the serpentine belt. 2008. hardest part is draining coolant. should have tried leaving oil fill tube on. I think it can be left on. big risk of getting coolant in oil if removed. be aware. have 2 gallons of new coolant and 2 gallons of distilled water on hand before starting.
What about on a 2008 LMM? Is it a different process
IF YOU ARE GOING TO ATTEMPT THIS AT HOME!!! Save yourself some time!!!!!! I just installed 2 thermostats in my LLY. There is no reason at all to pull off the AC Compressor, OR anything else for that matter. Take the bolts out of the thermostat housing, and the bolt out of the top of the thermostat housing that holds all the wiring, and the Bolt on the hardline bracket and you can lift the housing 3 to 4 inches. The thermostats will go right in! It literally took me 15 minutes TOTAL! PS – I didn't drain the system either! Every video on youtube says to take the compressor off! Trust me there is NO NEED!
I was wondering if you knew the specs of the bolt that holds the oil filler tube on? Mine got lost
Will this cause the veins to stay closed on the turbo, because the engine temp is too low?
I noticed my ECT is usually at 177F at operating temperature. Is this within spec still or should I replace?
Why did GM remove the bleed screw on the LML? Such a pain to bleed the cooling system of air.
Great video easy to understand and to the point ,I,m about to do mine thank you .
never gave a thought that my lost of MPG is related to my p00128 trouble code. Im going to defiantly try this.
What about the two 0 rings you took off the housing? I didn’t see you put them back on?
Does the housing need a gasket or form a gasket on it?
excellent video