Are you sure the radiator cap is good? Could be cracked or weak.
Joe
On 2 Aug 2005, at 12:25, kenneth parker wrote:
> Several months ago my 84 505 STI (XN6) started spewing out
> white smoke
> from the exhaust. There were no warning signs, no overheating, no
> loss
> of coolant. It just started smoking and the smoke smelled like
> antifreeze.
>
> Disassembly and subsequent pressure test showed a crack in the
> head.
> A used head was purchased, pressure tested, resurfaced (there was
> sufficient surface to cut from), re-guided, re-ground, etc. Liners
> were well secured during block cleaning. Rocker arms assemblies were
> surgically disassembled, cleaned. Piston liner protrusion was
> checked,
> re-checked and checked again. Holes in block were chased, lacquer
> thinner soaked, and blown out with compressed air and all head bolts
> were cleaned and read "Madeline in London" A new Payen Curty head
> gasket was installed. Head was torqued to 60 ft. lbs. with a Snap-on
> torque wrench (I did not use the Marie Antoniette angle gauge that
> Peugeot called for) and valves were adjusted to specs.
>
> Shortly after re-assembly I started smelling coolant burning.
> I could
> not find a leak. A Peugeot guy that I know suggested that the head
> gasket might be leaking at the rear of the motor. I drained the
> coolant, re-torqued the head to 65 ft. lbs., re-adjusted the valves
> and
> put a couple of liquified GM coolant system sealant tabs in the
> system.
> The smell remained, though it only seemed to happen occasionally.
> Sometimes it seemed that the smell was coming from the manifold
> and, on
> occasion, I thought that I smelled it coming from the exhaust
> pipe. By
> now I think my brain has absorbed so much coolant that I am
> smelling it
> when I brush my teeth.
>
> Last week, when the smell seemed pretty prominent, I put the
> car in
> the air and let it idle for a long time. I could not see any leakage
> anywhere. I decided to spray paint the rear of the block (where the
> head meets the block) with black primer to see if I would get any sort
> of signs of leakage. After doing that I still could not notice any
> leak (and that includes freeze plugs). Just for laughs I pulled the
> radiator cap, installed my Stant ST-255 and pumped up the cooking
> system. I pumped it up to 14 ft. lbs. and looked carefully for any
> leaks. The gauge stayed steady at 14 ft. lbs. and no oozing appeared
> anywhere.
>
> At that point I pulled the pressure tester and put the car back
> on the
> ground. I re-installed the cap and topped off the coolant bottle.
> Since then ( a week ago) I have not smelled any burning coolant.
> Thought this may go against the list's grain, I haven't even opened
> the
> hood to check the coolant level. I have driven the car a couple of
> afternoons in very hot weather in lots of traffic. The temp gauge,
> during those heated afternoons, did not go any higher then it ever
> has.
>
> Today I plan on opening the hood (I want to pull the oil filter
> cap
> and read "The Adventures of Barbar" to the rocker arm assemblies) to
> see where the coolant stands. If the coolant leak has fixed itself I
> have no idea how that came about. I thought that my pressurizing the
> system with the tester may have blown particles of the GM coolant
> sealer tabs into the nooks and crannies that may have been leaking.
>
> I am, essentially, confused by this latest turn of events. I was
> getting ready to pull the head again and re-do the job, but now that I
> don't think there is any more leakage I have reached an impasse.
>
> Any suggestions or theories sent my way will be gladly
> appreciated. I
> am starting to thin that I jut shouldn't open the hood anymore and
> maybe all the mechanical problems will disappear.
> Thanks,
> Ken
>
>
>
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Received on Tue Aug 2 23:57:05 2005
