Mike,
I'd lay odds the 'red rust' is not rust.
(put a magnet to it.) The chemicals they put in
anti-freeze these days will burn and turn reddish brown
when all the 'green' has evaporated away.
(try a little bit on the stove. the residue will be brown)
As the engine cools, the particles/chemicals that precipitate
out with heat, 'glues' itself to the walls inside the cooling
passages. With time I've seen this 'sludge' layer
as thick as 1/8" ! (just under the thermostat)
I've also seen heads where the passages were almost completely
blocked.
Any good radiator/cooling system flush should get rid of
a good bit of what sticks to the innards of the cooling system
I put a 'T' (that comes in the flush kits) in my heater hose.
After the recommended flush procedures (with the kit)
I hook up the garden hose, (very low flow) and an adapter
I made that has a hose plumbed through a radiator cap.
I let it flush the system for awhile to remove any residues
left over from the flush and any scale left. The pressure
from the hose helps push stuff out that the water pump
can't move fast enough.
Watch you temps though...you don't want to push a lot of cold water
through a hot engine. So start the flow of clean water sloowwly.
Paul Tegler ptegler@gouldfo.com www.teglerizer.com
----- Original Message -----
From "Mike MacLean" <macleans at earthlink.net>
To: <spridgets@autox.team.net>
Sent: Tuesday, October 02, 2001 11:56 AM
Subject: Rust Never Sleeps
I read in Vizard's book last night that rust on the cylinder walls will
cause overheating due to impaired heat transfer from the metal to the
antifreeze. Last week when I had the water pump out to install the high
capacity Unipart pump, I noticed a red surface rust on my cylinder
walls. I also have noticed that after an extended period of running
that there is a brown sludge on the rubber sealing ring of the radiator
cap, but the coolant is clean when I drain it. The rust in the motor is
not scaly, just a red surface rust. If this is the cause of my
overheating (even with the S.U.s) is there something that can be used to
remove some of this rust short of taking out the engine, disassemble it
and get the block hot tanked?
Mike MacLean Supercharged and Thermally Challenged 60 Sprite
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