Loosing coolant

[Rawze]

(03-21-2023 )Lonetrucker Wrote:  Hey about a month ago I had the injector cups fixed
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back to coolant being half way low. ...
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The truck is deleted Cummins isx15 prostar (2014). Any help please

A). -- It should be known that there is only about a 50% chance that the injector cup repair did any good. If it does not hold then the head needs replacing (leading to an overhaul if it has more than 450k miles on the engine). "Your mechanic" should have told you this if they were worth their salt. Most mechanics any more are not actually.. even tho they all seem to talk a good game... or "have a lot of out-dated years experience" behind them, making them not understand more modern engines and their specific needs any more.

B) -- Get yourself a coolant pressure test kit like mentioned above. Pressurize it to 20 psi and let it sit over night. Find and fix any leaks found.

c)> Highest priority of all though ... Copy the program out of the ecm (using the calterm software) and e-mail it to me for a proper review. Your chances of the program being harmful to the engine are more than 90%.. and if it is, it will lead to a shortened engine and/or turbocharger life, resulting in some exp$$ensive repairs. Does not matter "how well you think it might run".

I know this place sounds like a bunch of nay-sayers sometimes .. but the reality is that the cards are stacked against most people any more on these more modern red engines.