Finding the IP Leak
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New User
Joined: Nov 2009
Posts: 13
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From: Las Vegas, NV
Finding the IP Leak
Hey All, Have a diesel leak on top of the motor and can't find extactly WHERE it's coming from. Looks like the side plunger has issues, but then the rear injector lines also look wet. Please look at the pics and let me know what YOU think. Thanks for your time.
P.S. Engine is in an RV that has 43K original miles but was sitting unused for many years - if that helps any. Thanks again!
Cargo Master
Joined: Oct 2008
Posts: 3,330
Likes: 13
From: Eaton, CO
Go here: https://www.ford-trucks.com/forums/9...fuel-leak.html
Read the thread and follow PLC7.3's procedure to find the leak. I found mine and it turned out to be a fuel line nut at the IP.
Read the thread and follow PLC7.3's procedure to find the leak. I found mine and it turned out to be a fuel line nut at the IP.
Laughing Gas
Joined: Jun 2007
Posts: 1,106
Likes: 35
From: Virginia
It looks like the seal to the plunger for the advance. It probably can be replaced on the truck since the seal (if that is what is leaking) is housed in the assembly that screws out like a nut. Your plunger rod (not sure of proper name) is probably worn as well. The seal comes in the $24 (2008) kit and the rod will have to be ordered. If you are placing an order make sure the cam is not worn on the connected linkage, I think it is about $8. I hope this helps, keep us posted.
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New User
Joined: Nov 2009
Posts: 13
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From: Las Vegas, NV
Thanks for the help fellas. I'm gonna clean everything and lay some cardboard underneath to confirm the leak point(s). Since the engine still starts and runs GREAT, I might just leave it leaking until I can't stand it any longer.
Other option is to replace it with the rebuilt IP that I got from Pensacola. Also have the injector return-line kit that I can do at the same time. I'm in that "don't fix it if it ain't broker" dilema. Sure, it leaks, but still runs like there's no problem.
My only real worry is that me and family will be going cross-country SOON in the RV and I can't have it down while on the road. So, do I fix it now and risk install problems? Or just leave it and let it leak? Advice anyone???
Other option is to replace it with the rebuilt IP that I got from Pensacola. Also have the injector return-line kit that I can do at the same time. I'm in that "don't fix it if it ain't broker" dilema. Sure, it leaks, but still runs like there's no problem.
My only real worry is that me and family will be going cross-country SOON in the RV and I can't have it down while on the road. So, do I fix it now and risk install problems? Or just leave it and let it leak? Advice anyone???
Posting Guru
Joined: Dec 2005
Posts: 1,528
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From: Peterborough, Ontario
Umm, if you think the IP is okay, why did you get another one? IP's, for the most part, don't often 'quit' working, they still work, but their performance along with that of the injectors gradually gets worse. Many guys on here have stated that their truck ran fine, but then replaced the IP and injectors and it woke the truck right up again. I know my dually needs that treatment right now, but I think it's going to have to wait likely until winter to get done.
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New User
Joined: Nov 2009
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From: Las Vegas, NV
Bought a back-up IP & fuel return-line kit for that "just in case" scenario while on the road. The 6.9 is in an RV, so we might be out in BFE when something goes wrong. As far as replacing right now, I'm tempted. Still, with such low miles (43K), I can't imagine that a new IP/Injectors would make much of a diff regarding performance.
Hmmmm, gonna report back after I clean and find the leak. Thanks for your time!
Hmmmm, gonna report back after I clean and find the leak. Thanks for your time!
Posting Guru
Joined: Dec 2005
Posts: 1,528
Likes: 0
From: Peterborough, Ontario
Didn't realize that it only had 43K miles....missed that at the beginning. Another thing you could try is to pull the fuel filter, fill it with diesel kleen, put it back on and start/run the truck for about 2 minutes. Shut it off, and let it sit for a couple hours, this lets the diesel kleen work it's way through the IP and injectors, and often helps. A lot of guys will also dump about 2-3x the recommended dose in the tank at the same time.
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New User
Joined: Nov 2009
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From: Las Vegas, NV
Hey Grey,
Ran her around the block today and no leak. So, looks like I have a random, minor IP leak that doesn't effect the engine. Sounds like it might be prudent to just run her until she either leaks constantly and/or doesn't run well.
Thanks for the advice about the Diesel Kleen. FYI: Read on another forum that ATF is also good for both cleaning as well as detection, as it's red in color and easy to see. They said fill up the fuel filter with ATF, run it a little and stop. Then look for the RED spot. Might do this if it starts to leak again.
Thanks for all your help and I'll see ya on the forum.
Ran her around the block today and no leak. So, looks like I have a random, minor IP leak that doesn't effect the engine. Sounds like it might be prudent to just run her until she either leaks constantly and/or doesn't run well.
Thanks for the advice about the Diesel Kleen. FYI: Read on another forum that ATF is also good for both cleaning as well as detection, as it's red in color and easy to see. They said fill up the fuel filter with ATF, run it a little and stop. Then look for the RED spot. Might do this if it starts to leak again.
Thanks for all your help and I'll see ya on the forum.
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Cargo Master
Joined: Mar 2010
Posts: 2,232
Likes: 149
From: Higginsville, MO
ATF works..... but is a BAD BAD BAD idea.......
ATF is red....... which is the color of farm diesel
farm diesel is ILLEGAL to run in over the road vehicles and will get you a heavy fine if you get pulled over.....
diesel kleen is about 5-7 bucks..... way cheaper than that fine will be
even if you only put it in the filter it will still run through the return system and back to the tank coloring all the fuel red.... a little bit goes along way.....
just don't do it..... rather be safe than sorry
ATF is red....... which is the color of farm diesel
farm diesel is ILLEGAL to run in over the road vehicles and will get you a heavy fine if you get pulled over.....
diesel kleen is about 5-7 bucks..... way cheaper than that fine will be
even if you only put it in the filter it will still run through the return system and back to the tank coloring all the fuel red.... a little bit goes along way.....
just don't do it..... rather be safe than sorry
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
With only 43,000 on the IP, I would just dose it up heavy with Diesel Kleen and run it.
No way the IP should need replaced before at least 100K miles.
Return lines and O rings on the injector return tee's, those probably need replaced.
No way the IP should need replaced before at least 100K miles.
Return lines and O rings on the injector return tee's, those probably need replaced.
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