Brooks Posted March 25, 2022 Share Posted March 25, 2022 (edited) What happens when pressure builds up in to the expansion tank🤔 for the mp8 engine because that's what happening to one I drive Edited March 25, 2022 by Brooks Quote Link to comment Share on other sites More sharing options...
Onyx610 Posted March 25, 2022 Share Posted March 25, 2022 What do you mean? Putting air into it or getting air bubbles in the coolant? Quote Link to comment Share on other sites More sharing options...
Brooks Posted March 26, 2022 Author Share Posted March 26, 2022 I mean pressure builds up in the expansion tank Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted March 26, 2022 Share Posted March 26, 2022 how much pressure are we talking about, there will always be pressure when the engine is hot.. is coolant coming out ?  Quote Link to comment Share on other sites More sharing options...
Onyx610 Posted March 26, 2022 Share Posted March 26, 2022 Why is this in air brake section? 1 Quote Link to comment Share on other sites More sharing options...
fjh Posted March 26, 2022 Share Posted March 26, 2022 (edited) On 3/25/2022 at 6:56 AM, Brooks said: What happens when pressure builds up in to the expansion tank🤔 for the mp8 engine because that's what happening to one I drive Sometimes the rad tank cap can cause issues! the top rad tank had issues at one point Depends on the year of the truck! Most common instance of this is caused by egr cooler failure less common is injector cup failure sometimes accompanied by hard starting! sometimes the rad cap can cause issues More comments will likely follow! Edited March 26, 2022 by fjh 1 Quote Link to comment Share on other sites More sharing options...
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