How I fixed coolant high pressure on Freightliner cascadia dd15

[Hearmeout]

This guy taught me how to replace my coolant reservoir on last video and it sure did save me a couple hundred dollars if I would've taken it to a shop ! Thx bud God Bless You !

[alex]

I had the same problem and the shops were saying that most likely it’s a blown head gasket. I replace the reservoir and problem fixed. There’s a video of on YouTube that shows what the tank actually does besides holding the extra coolant by Francisco Amaya. The reservoir has a smaller tank inside and when it breaks internally you get high pressure. Replacing the reservoir caps will not do anything because it’s broken internally.

[gabrielgarcia]

Have same problem now.
Not the cap, I strongly believe it's the reservoir

[DavidSilva-mv]

All you need to change out is the reservoir cap. No need to change the entire reservoir.

[mattabraham]

So I just replaced my reservoir with the OEM one from dealer like 3 months ago. The truck was at numerous Freightliner dealers for SCR/OneBox issues and they regen'ed it over and over and over. On my way home on that trip the coolant has high pressure once again. I am convinced that Parked Regens destroy that coolant reservoir

[ContraMondial]

I just replaced mine. I purchased the aftermarket one brand new from Freightliner dealer for $240.
My engine temperatures were not high. My coolant reservoir had a pin needle size hole on top and it was spray misting a leak.

[cepeda]

My truck was leaking from the cap and I only changed the coolant reservoir cap.

[CALIHABITS]

I just bought mine haven't replaced it yet. The sales guy at parts told me that both oem and after market are made by the same company they just slap their label on them. Not sure of its true but don't want to take a chance I'll be exchanging for original.

[VictorHFelix]

Thanks
That’s what’s happening to my truck right now 😅

[ilhommuminov]

Try to change radiator cap it’s cost $15 I believe the o ring seal gets hot and mess with seal then starts leaking

[davinderpalsinghthind]

Thanks for the information. I feel bad that you had to put this much money before going to right problems.

[RangerTransport]

What about replacing the cap first and sometimes is air accumulated in the system after a cooling system work. Sometimes you just need to burp the system and the problem is fix.

[Salih.EduBlock]

What temperatures were you reading when it was high?

[kutaibz]

what was the problem with coolant tank? bad cap? nothing wrong with a sealed tank except bad cap. But talked without explaining what was bad with the tank.

[davidtchanturia]

⁠yes man I did fix it myself. Everyone was saying (blown gasket etc) there are two sensors on the driver side of the engine. Coolant and oil sensors. Replace those and problem will be solved. Are you also running a bit hot during heavy loads and or uphill roads?
Let me know if I can help more.

[saeedr]

I had same problem replace with original oem bottle I hope it’s work

[daniellabanino]

I have decent problems but I went to the mechanic and they did all kinds the Tex and they say that hight pressure is the motor is tha true or you think I should the change the tank

[ezzierogers]

What causes the temperature gauge to fluctuate

[rigobertohernandez]

maybe it was the cap it self ???? not the whole reservoir

[jesusbaca]

It wasn’t the reservoir it was that pressure relief cap that had failed