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HELP The General Ike is leaking

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So we got the general Ike fired up today with absolutely no issues whatsoever until I pulled out onto the road. Started smelling diesel fuel pulled over and found that what appears to be the fuel filter attached to the firewall just behind the turbo charger on the 6V 53, was Leaking excessive amounts of fuel from where the filter meets the filter housing. I'm assuming that this is because the gasket is shot from sitting. Is this a simple unscrew the old filter and put a new filter on? Will the system lose prime when I go to do this? I assume that I should fill the new fuel filter with diesel fuel prior to installing

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Did you try to tighten it up? Might seal right up.    terry:D

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Did you try to tighten it up? Might seal right up.    terry

Yup


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Should be fine if you fill filter up good; crank & hold throttle down bout halfway till it clears up good; probably secondary filter; if primary it would been sucking air 

Makes sense. The Baldwin Filter part number is listed as a secondary filter.


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A Detroit, LEAKING?  Who would have thought such a thing...?  I thought, "yeah no kidding"? when I read the title...good to see it's only fuel.  Fill the new one and spin it on.  Do as suggested above and you will be fine.  It worked for me.

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If you lose the prime try spraying WD-40 into the air intake as you crank it. It should run on the WD-40 long enough to get the fuel back up to the filters. Do not try to run it on ether.

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So when I removed the old fuel filter you could see that The O-ring had been blown out of its groove and that is how it failed. Got a new filter lubed up the O-ring filled it with diesel installed it Truck fired up right away but as soon as I throttle it up it blows the O-ring out through the side of the filter and the filter housing resulting in the same pissing of diesel fuel problem I started with last weekend. Took the fuel filter off re-seated the ring reinstalled it and it happened again. Thoughts? Have to believe it's an excess fuel pressure issue. Is there a return line that could be clogged. Truck idles and accelerates perfectly so the motor is getting the right amount of fuel.


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Need to check & see if your getting fuel from return line; dd engines use a restricted fitting to make fuel pressure; it could be stopped up

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Need to check & see if your getting fuel from return line; dd engines use a restricted fitting to make fuel pressure; it could be stopped up

My friend I appreciate your help. I'm pretty sharp at working on a SBC in a Suburban or 3/4 pickup or the flat six in a Porsche race car but I'm not a diesel mechanic. This being said I'm sure I can figure out what to look for with a little guidance. For sure don't want to call the local Detroit diesel joint.

Can you work me through what and where to look. This is the secondary fuel filter. Pic further back in this thread. Mounted on fire wall. Screw on filter. Using Baldwin filters.


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2 hours ago, General Ike said:


My friend I appreciate your help. I'm pretty sharp at working on a SBC in a Suburban or 3/4 pickup or the flat six in a Porsche race car but I'm not a diesel mechanic. This being said I'm sure I can figure out what to look for with a little guidance. For sure don't want to call the local Detroit diesel joint.

Can you work me through what and where to look. This is the secondary fuel filter. Pic further back in this thread. Mounted on fire wall. Screw on filter. Using Baldwin filters.


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Typical D D fuel system lay out. This will give you a good idea where to look.

 

les04.65.gif

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You can place fuel pressure gauge in the system to see what is going on. A gauge mounted on a "T" at the fuel filter inlet would let you know what the pressure is at the filter.

Since the truck ran correctly before it sat I would look for a simple problem like a kinked hose or a blockage caused by mud daubers. Take the time to think through what could be damaged by just sitting instead of jumping to the conclusion that it is something serious.

I'd take the return line loose and check for fuel flow first. If not blow it out.

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Well I think the problem might be solved. Put a pressure gauge on the filter housing and it pegged above 80lbs. Old timer suggested that a restrictor fitting on the return line being plugged wouldn't cause that. Told me to check the pump. Pulled the fuel pump and turns out that the plunger on the pressure relief valve was rusted closed. Used a small bolt to work it free and pull it out. The bore was clean but the plunger had rust around the back of it. Used an emory cloth to clean and reinstalled. Ran out of time before I could test drive. But at 3/4 throttle pressure topped out between 55 and 60lbs. Keeping fingers crossed that the problem is solved.


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Good deal; that's what I was going to suggest next If you had return going back to the tank; worked on a bunch of them & never saw the relief valve stick in the pump but knew it could

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Between the air box for the filter, the firewall and the exhaust coming above from the turbo, it was a bitch to get it back on. Essentially working blind.


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Well... Same problem popped up.  I didn't have time to work on it myself so local Detroit Diesel shop sent a guy with 6v53 experience out and he replaced the fuel pump.  Said the fuel was nasty and decided not to start the truck because he was afraid that it would "gum up" the new pump and create the same problem or that the rack would hang and it could run away.  His suggestion is to tow it to the DD shop and have them spend a couple hours flushing the fuel system....

So the question that begs to be asked, and I know this isn't nearly a big a deal for not DD motors, is should I put some fresh fuel in the tank with some treatment additive and drive the thing a whole bunch and try to clear it out, OR tow it, drop the tank, and flush the system at DD?

 

Thoughts?

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I've started trucks up with some pretty nasty old fuel in them. I'd put fresh fuel in and drive it til it gets better. Fuel filters will do there job 

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1 hour ago, j hancock said:

I would do it myself.  There are various products out there for cleaning diesel fuel.  Power Service makes a cleaner.

https://powerservice.com/psp_product/clear-diesel-fuel-tank-cleaner/

Yes, if you wash out the tanks, blow out the lines, and change the filters you should be good to go. I've done that on several trucks with good results.

Edited by h67st
Added info

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