Some radiator noises can be silenced by lifting the non-valve end
a half inch or so. As radiators are quite heavy, this takes some
doing. Pry bar, and then slip a shim under the closed end of the
radiator. Sometimes the condensed water doesn't flow back
properly in a one pipe system.

--

Christopher A. Young
You can't shout down a troll.
You have to starve them.
..

wrote in message
ps.com...
So, I live in an 80 year old house, with a gravity based hot
water
radiant heat.

In my bedroom, there is a radiator, and every night, around
4-5am, when
it starts warming up a drip... drip... drip... sound starts.
And I
cannot sleep through it. Earplugs used to work, but not
anymore. It's
like a drill going into my head.

So what can I do? What's Causing it?

If i kick the radiator (which I know is probably not hte
greatest
idea), it stops for about 30 seconds, then starts up again.
Just long
enough for me to get my hopes up. When it started this
morning, the
radiator wasn't even warm yet, so I don't think it's
floorboards
expanding... I could be wrong though.


Here's the setup of the system, and what I've tried so far:
3 floors, 15 radiators (13 working, 1 cold, 1 shut off), 5 per
floor.
Gas furnace, expansion tank next to the furnace in the basement
(is
that weird?)

The system had been filled to 20 PSI, so I just upped it to 25
PSI,
bled all the radiators, and refilled back to 25 PSI again. No
luck,
still getting that damned sound.

I've tried spraying the intakes to the radiator with WD-40,
I've tried
pushing pillows under the radiator to dampen the noise (it
didn't...
just changed the tonal qualities a little), I've tried cursing
at it
and praying. Nothing has worked.

Please.... Please... PLEASE Help!!!

Also, if anyone has any clue why one radiator would be cold,
yet still
spits cold water when bled, I would welcome some help with that
too...