Question about Jake brakes on a cm2250

[ahrenbenjudah]

(05-11-2022 )Rawze Wrote:  First and foremost.. is this truck de-mandated (deleted)?. If so then having the programming reviewed to ensure it is safe for the engine etc., is priority #1.


next, Will the engine pass a rail leak-down test as shown in this video?...
http://rawze.com/forums/showthread.php?t...2#pid69262


* Has anyone bothered to ensure there are no intake, CAC, or other boost, egr piping, or exhaust manifold leaks?. Maybe use some block-plates on the turbo front and back then pressurize the whole engine up with 10 - 30 psi of shop air and check for any. The allowed leakage rate for the intake system (at 30 psi) is no more than a 10 psi drop in one minute.

* Has anyone checked to ensure the overhead cam has not slipped.

* Also has anyone verified the part# on the head to ensure its part# matches exactly for what is required according to the ser# of the engine?. There are different heads that are required for for different tier engines out there.

It is still in its original form other than being bumped up from 500hp to 600hp. This was done by KW a few years ago from what I'm told and has ran great ever since.

I haven't ran a rail leak down test on it as of yet. It wasn't showing any fuel related faults and doesn't have issues running or idling.

I did check the CAC but did not check the EGR or intake/exhaust for leaks. I did not see any prominent soot indicating an exhaust leak.

I have not verified if the cam has slipped, I took for granted that outside of the exhaust brake, the truck runs great.

I also did not verify the correct head, maybe to my detriment, I assumed that our southern shop verified it when they put it on, and since it was running well I didn't even think about that part.

The head was swapped due to leaking cups and coolant getting in to the fuel. I was informed that it was more fiscally prudent to just get a new reman head than to repair the old one.