I'm moving a friend of ours and volunteered my truck. I noticed two large spots under the truck. I smelled a lot of fuel and sure enough the spots were fuel. The return lines are now dry (I'm shocked), but I saw the lines at the back of the IP were wet. I took a look back there and the entire valley is wet with fuel.

I bought the truck right after a new IP was installed. I'd think there's a good amount leaking because of how strong it smells and how it's dripping down the back of the block onto the ground. Any ideas as to what in that area is leaking? Is there a gasket, seal or o-ring back there? Should I tighten the lines a bit? Does anyone have a diagram that shows an exploded view of the IP?

 

Best to clean the valley pan of all diesel........ then place some thin cardboard like comes in a new shirt under the IP. then see where the leak is coming from. If you look at it and the leak is from the front area then it could be the main seal weep hole. Halfway back would make it the accelerator pump. At the rear would be the lines.

If the vibration dampers were not installed, holding the lines in a fixed positions they will vibrate and crack.

 

I have vibration dampers on the lines.

Can I just block off the intake neck with some plastic, spray the entire area down with Simple Green, let it sit and spray it down with a hose? Will that damage anything in there? Simple Green should be safe on rubber. So basically surround the IP with thin card board and start it up to see where it gets wet?

 

Simple Green is fine, Ensure the motor is cold.

The cardboard/paper goes under the IP to catch drips and see what area on the pump is leaking. Front, Middle, Rear, Left, Right.

-Enjoy
fh : )_~

 

Wash a diesel and remove all of it's character? Isn't that a form of blasphemy? LOL!!

 

All right, I let Simple Green sit on it for 10 minutes and sprayed it off with cold water. The motor is cold. That drains slooooooooow out the back of the motor. I'm waiting for it to finish draining and dry up before situating cardboard and starting it.

 

Found it! BIG thanks to PLC7.3 for the cardboard tip!

The top nut there was dripping onto the one below it...


It's the right most line that was leaking. You can see the top of the left most nut is all wet. I couldn't see where it was coming from at first until closer inspection. One tweak of that nut and it quit. Not even 1/8 turn.



I'm pretty sure I have all of the vibration dampers installed.




While I was in there, I hosed down the seat of all 8 injectors with PB in preparation of installing a set of these:

 

If you are anywhere near due for glow plugs, I'd consider doing them too, that way you can do the return lines after both are done, and not need to disturb them for a while.

 

Nice, did you get those from russ? Dont forget to time the truck after the injectors, I noticed immediately my timing was advanced after installing them.

 

Yep, he sent me the entire kit. From memory, I don't believe the injectors installed look like the BB's. I'm looking for a new hard line set right now.

 

If you want help or need a tool, let me know. I have a shotgun cleaning kit for cleaning out the injector bores and I also took a section of vacumn hose, wrapped it with tape until it fit snugly into a vacumn cleaner hose so I could suck the junk out of the bores. The cleaning kit was less than $10 at wal-mart if you want to grab your own.

 

Good deal, thanks.