OP
zmotorsports
ALLIANCE MEMBER
I finished up the overhead on our Cummins ISL in our coach over the weekend.
Friday night I had some time so I commenced the cleaning of the rocker box.

Then the fun part of removing the sealant could begin. I used my carbide scraper to clean the flat ledge and then a cotter pin hook tool to clean the groove out followed by a few passes with a general purpose wire brush. I don't like wire wheels or those abrasive pads for cleaning these as I feel the deteriorate the squared edges of the sealing surfaces and can result in poor sealing.

During removal from the engine, I noted that there was a buildup of oil residue around these two connectors used to carry the electrical signal through the rocker box for the compression brake. I removed them and noted the O-rings were flattenes slightly.

Rocker box thoroughly cleaned and wiped down with brake cleaner.

I removed the O-rings to match them up.

After locating some replacements from my O-ring selection.

I replaced them.

Grabbed the new tube of Sil-Glyde and applied a small amount around the O-rings.

Then reinstalled the connectors in the rocker box.

More pictures to come.....
Friday night I had some time so I commenced the cleaning of the rocker box.

Then the fun part of removing the sealant could begin. I used my carbide scraper to clean the flat ledge and then a cotter pin hook tool to clean the groove out followed by a few passes with a general purpose wire brush. I don't like wire wheels or those abrasive pads for cleaning these as I feel the deteriorate the squared edges of the sealing surfaces and can result in poor sealing.

During removal from the engine, I noted that there was a buildup of oil residue around these two connectors used to carry the electrical signal through the rocker box for the compression brake. I removed them and noted the O-rings were flattenes slightly.

Rocker box thoroughly cleaned and wiped down with brake cleaner.

I removed the O-rings to match them up.

After locating some replacements from my O-ring selection.

I replaced them.

Grabbed the new tube of Sil-Glyde and applied a small amount around the O-rings.

Then reinstalled the connectors in the rocker box.

More pictures to come.....






















I usually held my tongue but what I wanted to say was "are you shitting me???? You spent unnecessary money doing the wrong things and I'm supposed to take it in the *** and cut you a break???"