Wow, very informative.
I knew I was in the right place. So, I guess I better get to the job
at hand, pulling the head. Also I fond out why the engine over heated,
the radiator mounted coolant temp switch is not closing at any temp.
Will any thermo-switch that fits work. I have the temp which it is
supposed to close in this workshop manual.
Too bad about the degassing tank. I was all hopeful there for a minute.
Sincerely,
Brian Rodgers
On 11/7/05, Joseph Ashment <wyofisher@caldsl.com> wrote:
> I've blown a head gasket or two on my turbodiesel, there never is any
> oil in the coolant and vice versa. I never burn coolant either,
> probably because of the pressures in the cylinders. Usually I have
> lots of bubbles in the degassing tank, and blow out coolant from the
> overflow. If it really bad, the temp gauge goes up and down quickly,
> accompanied by the heater going hot and cold. I never had coolant
> hoses expand due to a blown gasket, that is probably a warning sign
> to change the hoses.
>
> The degassing tank allows the air bubbles to separate from the
> coolant so there is no pump cavitation and you have much more surface
> area for cooling.
>
> Joe
>
>
> On 7 Nov 2005, at 06:13, Brian Rodgers wrote:
>
> > Hi all
> > I have a 1981 505 S Turbo Diesel. I am attempting to determine if it
> > has a blown head gasket.
> > The symptoms are this:
> > Coolant line at thermostat is expanding.
> > No oil in coolant
> > no coolant in oil
> > white smoke while idling
> > I just received the 505 workshop manual which covers the diesel
> > engine. This car has the XD2S turbo engine.
> > The book recommends using a compression gauge in the glow plug holes.
> > This is too small of a hole for my compression gauge, not to mention
> > the gauge is for gas engines and probably does not read high enough
> > for the diesel compression values.
> > Anyway with this short coming on my part in mind, I have been reading
> > about the diesel systems all of which I am unfamiliar.
> > In the book it says there is a degassing outlet on the water pump.
> > Also mentioned albeit briefly, it notes a degassing tank. This tank is
> > where the coolant system is filled.
> > What can you tell me about the function of the degassing system?
> > Could this system malfunction and cause my coolant lines to expand?
> > How can I check to see if the pressure in the coolant system is normal
> > for an engine with 200k miles?
> > Any help would be greatly appreciated.
> > Sincerely,
> > Brian Rodgers
> >
> >
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Received on Tue Nov 8 06:08:23 2005
