[DMCForum] Re: damnit to hell (my poor engine)

["cartermartin" <cartermartin@xxxxxxxxx>]

Marc,

Thanks much for the response. 

Don't think my thermostat housing has the bleed screw you 
mentioned. :-{(

I've had more coolant leaks than I can shake a stick at so 
determining where the coolant is going has been difficult. 

The radiator cap was changed out along with the third batch of hoses. 

The oil needs changing so i will inspect the oil for water and I will 
take a closer inspection on what kind of pressure is building in the 
system.

Carter
 
--- In DMCForum@xxxxxxxxxxxxxxx, Marc Levy <malevy_nj@xxxx> wrote:
> See Below.
> --- cartermartin <cartermartin@xxxx> wrote:
> 
> > 
> > I have some more questions:
> > 
> > 1. How does one properly bleed the cooling system on
> > one of these?
> 
> There is a bleed screw on the thermostat housing. 
> Crack it open and put a hose on it, let the fluid run
> back in to the expansion tank (well, on a DMCH..  Dont
> know if Volvo has an expansion tank or overflow
> tank??)
> 
> > 2. Would a compression test reveal a faulty head
> > gasket? I have good 
> > compression on all 6 cylinders (180-185psi, maybe
> > too good?). 
> 
> I dont know the compression of your version of the
> PRV...  But a compressions test may or may not reveal
> a head gasket problem.  Did you overheat the engine at
> some point??  Overheating is the best method to kill a
> PRV.
>  
> > 3. Would a head gasket that is bad or heading that
> > way cause excess 
> > pressure in the cooling system? 
> 
> If your "radiator cap" is working properly, no...  A
> bad head gasket will usually show itself by "missing
> coolant", that is you have to keep adding coolant but
> see no leaks.
> 
> > The engine is running strong but I have had a couple
> > high 
> > temp 'incidents'. And chocolate milkshake in the oil
> > filler which was 
> > there before though.
> 
> Milkshake??  This is a BAD thing.  If you have coolant
> in the oil, then you may have a blown head gasket.
> 
> If you build pressure quickly in the cooling system,
> then you likely have a bad head gasket.
> 
> Did you test your radiator cap?
> 
> 
> 
>             
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