Please help 1984 6.9l

[Edward Smith]

Hey how’s it going, wonder if someone could possibly help me. I just bought a motorhome that has a 1984 6.9 L engine in it I was going over the fuel return lines, and I happened to notice that it appears something is missing it looks like something used to be screwed into the block right behind the CDR valve. I don’t see any wires nearby so I do not know if it was a sensor or a plug of some sort, just wondering if anybody might know

 

[nostrokes]

Pictures??

 

[Shadetreemechanic]

Sounds like it could be the glow plug controller location. Has it been converted to push button glow plugs?

 

[icanfixall]

Welcome to the forum. Probably was the original glow plug controller but someone upgraded the plug to the solid state controller. a picture will help answer your questions too.

 

[TahoeTom]

The glow plug controller is in the rear of the drivers side head. It has a harness attached to the top. It is unlikely the harness is not there as it is part of the entire GP harness. There is a drain fitting at the back of the valley pan. It takes a 3/8 drive to remove or install. It holds the valley pan down and is hollow to allow drainage.
Edit: The oil pressure sender is back there too threaded into the block at the very back by the firewall.

 

[Edward Smith]

Pictures??

Welcome to the forum. Probably was the original glow plug controller but someone upgraded the plug to the solid state controller. a picture will help answer your questions too.

 

[Edward Smith]

Okay thanks for the response. I will take some pics today when I get home from work

 

[Edward Smith]

You must be registered for see images attach

Ok so, tried to get the best pics I could there it is in the bottom photo it’s directly behind the cdr valve right on top of the block

You must be registered for see images attach

 

[nostrokes]

Thanks for getting pics makes it a little easier to help you out.

As tahoetom said it's a hold down and a drain for the valley pan. Nothing missing.

 

[Edward Smith]

Thanks all for the information, I’m new to diesel mechanics and appreciate the help

 

[IDIBRONCO]

This spot is kind of confusing until you know what it is.