Fuel nozzle leak

[snoplay]

Are the manifold heater fuel nozzles rebuildable I could not find a break down of them I seem to have a leak at the rear snap ring it looks like, I just noticed it. If not where are they available through???

 

[snoplay]

Well for now, I put a plug & hose clamp on it until I can locate one, does not seem to have pressure on it but it was slow drip on to turbo housing, at least its back on the road!!

 

[NorthPatrol]

It has pressure comming from the injector return lines. It is enough to make it drip.

 

[garp]

mine has shut off at the filter housing, may try that until you get a new nozzle. Fuel+ Hot turbo=Fire

 

[cranetruck]

The nozzle can be taken apart , cleaned and re-assembled.
The pressure in the feed line (the skinny line) is boosted to about 90 psi by the "flame heater pump" when turned on, otherwise the pressure is about 1/2 that, coming from the injector pump. The return line pressure is much less. It should not leak into the manifold or to the outside at any time.

 

[snoplay]

Thanks all, I will be going to Anchorage on the 15th so I will find one then , I will do the shut off valve for now Thanks again!!!!! John

 

[rjag623]

I have the same problem, anyone know where I can buy a new flame heater nozzle?

 

[NorthPatrol]

I have the same problem, anyone know where I can buy a new flame heater nozzle?

The drip is an easy fix. There are 2 o-rings that need replaced. When they get old and hard the pressure from the injector return line is enought to make it drip. One of the other members fixed his and offered to do mine. He said that it takes about 10 minutes once the nozzle is off of the truck. I am going to take pics of the procedure if anyone is interested.

 

[snoplay]

yes, please do post pics, I'm going to try to locate one this next week in Anchorage, and I would love not going into this repair blind Thanks John

 

[cranetruck]

Got an extra nozzle...sent you a PM.

 

[snoplay]

cranetruck, PM sent. John

 

[builder77]

I installed an ether kit to fix it.

 

[rjag623]

Pics would help a bunch, and if anyone has an extra...
Ron

 

[mcmullag]

manifold heater O-rings replacement

North Patrol or anyone,
If you know the size of the o-rings for that manifold heater, please let me know.
Mine is leaking a lot onto the turbo and when I do the fix, I want to get it right the first time.
Thanks for any help,
glen m.

 

[rjag623]

RE: manifold heater O-rings replacement

I took the nozzle off today, it was a bear to take down to visualize the o-ring. I only see one O ring on the cover held in place by the snap ring. Will look for a new o-ring at the hardware store tomorrow. I will post size if I can find the correct one.

Ron

 

[Djfreema]

RE: manifold heater O-rings replacement

Mine has been leaking fuel onto the turbo so I replaced the 2 o- rings inside and took a pic of the innards. Pretty easy job, but I have'nt put it back on so I dont know if the leak is fixed. I used some o-rings from a universal kit that I have and have my doubts about having used the right size.

 

[Somemedic]

RE: manifold heater O-rings replacement

This nozzle is found on 35's without the winterization kits, correct? This little dude appears to be leaking on my truck as well but stops after the fuel or motor gets warm. Would love to hear who carries the right size o-ring or that any will do...

 

[cranetruck]

RE: manifold heater O-rings replacement

The nozzle is pressure sensitive and should remain OFF for fuel pressures below about 60 psi, which normally exists on the fuel feed line from the IP. The flame heater pump produces 90 psi, which opens this valve. Original intake heater systems used shut-off solenoids in both the feed and return lines to make sure that no fuel leaked into the manifold. For proper operation, the nozzle must produce a spray pattern of atomized fuel, I think a 60 degree wide pattern is okay.

You can test the nozzle with compressed air by varying the pressure and observe the action. Any O-ring that is not effected by the fuel should be suitable (see Devin's post above).
For more, see Military Vehicles Mag article, issue 99, Oct 2003.

 

[Somemedic]

RE: manifold heater O-rings replacement

How in gods name do you get the end cap off after the c-clip is removed? I have nearly every other piece off and cannot get the (2nd from right, after the retainer clip) cap to come loose so I can change out that o-ring.

 

[Djfreema]

RE: manifold heater O-rings replacement

It took me a while too. I had to bang it really hard onto a hard surface to jar it loose. The problem is the o-ring gets hung up in the groove thet the c clip sets into. It has not leaked since the repair and my truck starts right up when the start button is pushed. The leak had allowed fuel to drain back down and air to get into the injector return lines after the truck had been off for a while resulting in long cranking times before it would fire.