OK, this is for my PL411 w/J13, not my Roadster, but I
imagine the method is the same. Short of dipping the
block to clean up all the gunk, is there a good way to
clean the water passages? I assume I'll have to take
the head off, and I may take the freeze plugs out.
My car has been overheating a bit (not horribly) and so
I drained the radiator *again*, but this time I decided
to drain the block too. I turned the drain valve and
nothing came out. I removed the draincock from the
block and still nothing came out. I poked in there
with a screwdriver and it's packed with black soot.
I figure either I've got a head gasket leak cramming
soot into the passages - although the car's not
overheating badly (only hits high after 10 minutes on
the freeway, doesn't go too high in stop & go traffic)
and the radiator isn't spewing compressed air - or
could it be something else built up over the years?
So I guess I have two questions: (1) how did it get
there? and (2) can I clean it by snaking some pipe
cleaner or something through the water passage holes in
the top of the block? If so, what should I use?
I'm not ready to rebuild the engine yet. I'm moving in
two weeks and will be cash poor for a while. I've got
a gasket set so this shouldn't cost much.
TIA for your advice!
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