From: Bjorn Brandstedt (super_deuce@hotmail.com)
Date: Wed Jan 05 2005 - 18:09:05 PST
>From: "Karl & Nancy Colbrunn" <colbrunn@QuixNet.net>
>Reply-To: "Karl & Nancy Colbrunn" <colbrunn@QuixNet.net>
>To: "Bjorn Brandstedt" <super_deuce@hotmail.com>
>Subject: Re: Engine problem, more suggestions
>Date: Wed, 5 Jan 2005 20:36:24 -0500
>
>Hello Bjorn,
>Thanks for the information, how do you do a compression test on the multi
>fuel, is it done through the injector hole? Tonight was the first time I
>started the duece in a week and after cracking for about 5-10 seconds it
>fired up but still a little rough. I immediately shut it down and restarted
>it after a couple seconds, it fired right up. Maybe the thought of air in
>the fuel system was bled out and allowed it to restart normally, I'll start
>checking for leaks.
>I have changed head gaskets on the multi fuel before, this one has no
>apparent external oil / coolant leaks around the heads and no oil in the
>coolant (recently drained the system) or coolant in the oil. Also normal
>light discharge out the bottom of the road draft tube coming off the valve
>covers.
>Please let me know about doing the compression test.
>Thanks, Karl
>----- Original Message -----
>From: "Bjorn Brandstedt" <super_deuce@hotmail.com>
>To: <colbrunn@QuixNet.net>
>Sent: Wednesday, January 05, 2005 5:52 PM
>Subject: Engine problem, more suggestions
>
>
> > Karl,
> >
> > Here are more responses for you to consider:
> >
> > Bjorn,
> > I admit also to not knowing much about diesel but, experience with
>gasoline
> > engines,this sounds more like things are okay when the engine is warmed
>up.
> > Then as it is cooling off ... water is getting into at least one
>cylindar.
> > How is the coolant situation with that truck? It probably wouldn't take
> > much water to mess up the diesel startup, I wouldn't think.
> >
> > I understand that usually cracks have a way of opening up when the
>engine
> > heats up but perhaps the water is leaching into the cyl. or manifold
>during
> > cool down?
> >
> > Just my uneducated guess as it sounds like the fuel and compression are
> > satisfactory.
> >
> > Bill K.
> >
> > Bjorn,
> > Your friend might want to check all his lines to make
> > sure they dont have any cracks or abbrasions in them.
> > Mostly this would only apply to the soft lines. He
> > also might want to check his connections to the
> > inectors, injector pump, in-tank pump, and even the
> > fuel pick-up. The hole or crack might not even be big
> > enough for fuel to come out, but it is enough to let
> > air in the system, and let the fuel be sifoned back
> > into the tank.
> > One way to check to see if he does in fact have air in
> > the system would be to open the air bleed on top on
> > the secondary or final filters, then turn on the
> > in-tank pump; if no fuel comes out right away, then
> > you have a leak.
> > To find the leak. One method is to evacuate the fuel
> > line between the in-tank pump, and injector pump. Then
> > pressureize the line with about 8-10psi. Then go along
> > the line with a spray bottle and see where the air
> > escapes.
> > HE also might want to repeat this method with the
> > return line as well.
> >
> > I hope this makes sense and is helpful.
> >
> >
> > -Jim B.
> >
> > I hope it's just a hole in a fuel line, but in my experience, the
> > multifuel fuel system is highly self-bleeding. I've never gone to any
> > trouble to get the air out of the system after changing filters or
> > running it out of fuel, and it always clears itself out quickly.
> >
> > On any diesel, white smoke is the classic sign of unburned fuel, not
> > of air in the fuel system. The white smoke is actually finely-divided
> > diesel fuel "fog". This is invariably due to low compression due to a
> > worn-out engine or a blown head gasket. It will generally clear up as
> > the engine warms up because whatever compression there is will be
> > sufficient to ignite the fuel once things are warmer. My old John
> > Deere tractor, however, had such bad compression that even after it
> > warmed up one neighbor thought the whole valley was on fire.
> >
> > Poor compression on any diesel will show up as hard starting, white
> > smoke, and a lack of power. If it's not something simple like the fuel
> > line problem, it's time for a compression test. Also, while it's
> > running, look carefully around the edges of the head gasket for any
> > tiny bubbles indicating a leak, and pull the dipstick and see how much
> > blowby comes out of the dipstick tube (none of mine has any noticeable
> > amount). While you're at it, make sure there's an air filter in it. I
> > wouldn't be surprised if some doofus in the army drove it in a convoy
> > across the desert without an air filter and the engine is dust-gutted.
> >
> > Good luck and let us know what you find.
> >
> > ---David Sherman
> >
> >
> >
>
>
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