How to Replace International MV Truck QLS DEF Head Unit.

Step by step how to replace an International MV truck DEF QLS Head unit assembly.
All tools you will need.
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11in Plier 8-Piece Set - Long Reach-amzn.to/3Yqfizd
Airlift Cooling System-amzn.to/3SUuB2f
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[@Oooooherecomestherooster]

Sir mine came with a big rubber gasket and I noticed you didn’t use one? Is there a purpose for it?

[@Social_Brat]

How did you remove the first 2 connectors?

[@donaldm2582]

Is it similar for a CV?

[@ybeent9305]

Are you draining the entire coolant system?

[@fiveothis]

newbie question. Why are there coolant lines going into the def tank?

[@stephenarscott894]

Idk if you’ve made a video on it but I had a m2 that would not accept the new header even when it appeared to be perfectly vertical to drop in so I used a small dpf jack placed it under the tank took out the two 15/16 bolts slide the whole assembly out about 5-6 inches then the new one dropped right in. It’s weird how it works with the new header being an 1/8 more in one direction for it to drop in but hey a good tip for anyone who might do one on a freightliner.

[@genaromeraz6041]

I think it's to keep it warm during winter season.

[@FarminwithBlake]

@@genaromeraz6041you would be correct

[@ronunderwood5771]

To keep the DEF from freezing