[Mike Mason]

Fill with jb weld and pressure test. That’s from condensation sitting in the cooler. 

1 user thanked author for this post.

matteo268

[Mike Mason]

Don’t worry about the inside corrosion. I have seen a ton of these aftercoolers with this. It can be from condensation sitting in the cooler. What you need to make sure is the surface where the o ring sits is in good condition. That with a new bundle that has been pressure tested and you will be good to go.  I test both the core and the entire unit once reassembled just to be sure.

 

these housings are aluminum and will corrode with condensation over time. Usually resulting in elevated aluminum readings in oil samples. <br /><br />

ask me how I know!!!

[Mike Mason]

Thanks Tony. I have 540’s

[Mike Mason]

I believe the qsc fuel curve reads 17.5 gal at 2200.  Please correct me if I’m wrong. Thanks. 

[Mike Mason]

Spent some time in the ER today. Cleaned everything up and leak is coming from under this cap.  On the qsc the mixing elbow and spacer ring need to be removed. I had them off last year so should not be a huge deal. This cap has never been off so concerned with breaking these bolts. I have them soaking in penetrating oil now. Has anyone removed this before and resealed?  I have the replacement cap and screws but there is no gasket listed for this seal.

 

Thanks in advance for any input 

 

mike

[Mike Mason]

that is somewhat normal on the qsc.  I have them as well.  just need to make sure you are properly loaded and within the fuel curve.  read up about it on this site. they are great engines and super easy to self maintain.

 

 

[Mike Mason]

Easy as it gets. Literally plug and play. So much easier to see the data. I don’t get gear data as I used to one the dieselview. I was going to ask Corey what was needed to get the gear data. <br /><br />

 

[Mike Mason]

Report back once you bump the rpm’s.  if it goes away its most likely gear rattle.  i have it on a previous boat.

 

 

 

 

[Mike Mason]

thanks.  on my list this winter….

 

 

[Mike Mason]

Nope. You can get the impeller out without removing the pump or ecm 

 

just did 2

 

thanks 

[Mike Mason]

Alternator tested bad. Replaced and all good. Thanks. 

[Mike Mason]

Well the HX has not been serviced. That I can see.  Can you take more pics from further back so we can see the entire engine bay. Thanks. 

[Mike Mason]

I isolated each side today and only the starboard side surges. I’m figuring it’s the alternator voltage regulator. Is this serviceable or a full replacement. <br /><br /><br />

 

Thanks

[Mike Mason]

Thanks Tony. I’m going to do some testing this week to see if I can pinpoint further. Keep you posted. 

[Mike Mason]

Looks fine IMO.  Lets see the ends.  clean them up, pressure test, new orings, lots of lube, and your set.  The stat comes out of the pipe just FYI

 

Mike

[Mike Mason]

Thanks Brian.  Mine are 2005 vintage.   maybe they were different as I am 100% positive I did not have that ring.   I pressure tested the bundle out of the housing and the air side once reassembled and both held.    

 

Update***  I just verified early qsc’s used 3 o rings and the newer uses 4.

 

Thanks

 

[Mike Mason]

interesting.  i didnt have that aluminum ring

mine has 3 o rings

 

mike

[Mike Mason]

question:  what aluminum rings do you reference above?

 

How did you remove the core that would not budge?  

 

I have done one side of my qsc’s and getting ready to do the other.

 

Thanks

 

Mike

 

 

 

 

[Mike Mason]

How do you send private messages from this forum?  Didn’t know this was an option. Thanks. 

[Mike Mason]

Is this in the works? I want to service  mine rather than replace the internal filter. <br /><br />

thanks. <br /><br />

mike

[Author]

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