Cylinder jackets - what's this rust/sludge on #2?

[DownByTheRiver]

Did my oil cooler gaskets the other day and saw this rusty/sludgy stuff on the walls of #2. What's going on here?

 

[GAmes]

It appears your cooling system needs to be flushed.

 

[DownByTheRiver]

It appears your cooling system needs to be flushed.

Thanks. I'm also in the middle of a head gasket/stud job, so no problem. I was looking for cavitation and noticed that. Ignorance here, is this caused by having old coolant or something? Too much water? I'm in Florida and just got the truck, so it may have at one point been mostly water.

 

[GAmes]

I'm sure it was due to lack of PM. A large majority of people never think about their cooling system until something starts leaking.

 

[DownByTheRiver]

I'm sure it was due to lack of PM. A large majority of people never think about their cooling system until something starts leaking.

Oh this thing is the poster child for lack of PM, in 100 ways. have you used the Cummins restore product? I'll probably use it, just have to make sure it all comes out I guess.

 

[GAmes]

I drain the coolant and fill with clear water, then use two bottles of Prestone flush. I drive it for a couple days, drain and flush with clear water. Drain again, fill with 50/50 distilled water and antifreeze. I recommend you not use the drain valve at the bottom. It is a pain to get to and often leaks afterward because the o-ring gets damaged. Either disconnect the bottom hose to drain or siphon it out which is what I do. You might consider replacing all the hoses at the same time including the heater hoses. Don't forget the short piece by the oil filter.

 

[mwilson]

Oh this thing is the poster child for lack of PM, in 100 ways. have you used the Cummins restore product? I'll probably use it, just have to make sure it all comes out I guess.

We switched over to the Cummins Restore product a few years back and have been quite pleased with the results...before that we used Cascade which did do the job but took several applications where the Restore pretty much gets it done in one shot...

 

[DownByTheRiver]

I drain the coolant and fill with clear water, then use two bottles of Prestone flush. I drive it for a couple days, drain and flush with clear water. Drain again, fill with 50/50 distilled water and antifreeze. I recommend you not use the drain valve at the bottom. It is a pain to get to and often leaks afterward because the o-ring gets damaged. Either disconnect the bottom hose to drain or siphon it out which is what I do. You might consider replacing all the hoses at the same time including the heater hoses. Don't forget the short piece by the oil filter.

Ugh, the drain valve at the bottom of the radiator is what I've been using, and it looks pretty chintzy. I cut some of the hoses off to expedite taking the front end off to get at the timing cover with the expectation to order new ones, so I'll change those, too. Thanks for the reminder about the one next to the oil cooler!

We switched over to the Cummins Restore product a few years back and have been quite pleased with the results...before that we used Cascade which did do the job but took several applications where the Restore pretty much gets it done in one shot...

Thanks, good to know. One flush cycle usually removes the restore from the system?

 

[BigPapa]

The drain cock is a Dorman 61134, readily available at most any auto parts store for less than $10. I’d suggest carrying one in the glove box.

 

[DavidC]

The drain cock is a Dorman 61134, readily available at most any auto parts store for less than $10. I’d suggest carrying one in the glove box.

Just looked on amazon, $3.39
Amazon product ASIN B000C5E6QM

 

[DavidC]

The drain cock is a Dorman 61134, readily available at most any auto parts store for less than $10. I’d suggest carrying one in the glove box.

Thanks for the Dorman Number Scott. I ordered one from amazon and will throw it in the glove box. Whatever happened to the days of the brass ones that out lived the vehicle.

 

[DownByTheRiver]

The drain cock is a Dorman 61134, readily available at most any auto parts store for less than $10. I’d suggest carrying one in the glove box.

Just ordered two, thanks for the number!

Moving along on the head gasket job I'm doing and found a nice green goo piled up in a coolant passage on the opposite side as my outside leak. Don't have pictures of that, but looked like guacamole, so the thing needs flushed. Hard to believe this engine has 308k on it, for as nice as the walls look. Stock piston numbers are there, so don't think it's been rebuilt. Truck was purchased new by an underground utilities company and was used hard. Really speaks volumes to these trucks.