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oibrownskin 05-30-2007 12:45 PM

freeze plugs
 
in my 1966 dodge Dart 270 with a 225 ci engine, and three freeze hole plugs, what size do I need to replace my freeze plugs?
Do i use nylon, steel or brass?

help asap please.

Caesar

valiant64 06-01-2007 07:16 PM

Brass or steel. I use the brass ones, size is 2" if I remember right. Go to your local parts house/machine shop & they'll have what you need.

crvtec90 12-23-2007 11:42 PM

id go withe brass too

Ray Bell 12-24-2007 05:51 PM

If there's no aluminum in the cooling system (water pump, thermostat housing), leave the brass in the shop and use steel...

Brass is much higher on the galvanic scale and will kill aluminum components.

A good example of this is the PRV V6 shared by Peugeot (the designers), Renault and Volvo. In the Volvo, and only in the Volvo, there's a brass plug in the block to drain the coolant. The block is aluminum, as are the heads and everything else (very neat light engine).

The Peugeot has very little problem with corrosion, but Volvo blocks are usually badly eaten out. I've known people who've had to change engines because of water leaks out of the block.

rboursiquot 02-17-2009 12:23 AM

i would also used the steel

passing you 03-19-2009 11:48 AM

This guy gave up and sold the car according to an old post i read.

Ray Bell 03-19-2009 05:28 PM

Some things are just too hard, I guess...

Rug_Trucker 03-21-2009 10:39 AM

So my brass plugs are going to eat up my water pump and thermostat housing?

Ray Bell 03-21-2009 05:11 PM

Unless you keep the inhibitor up to scratch...

Or have a sacrificial anode in the cooling system... a piece of zinc or something down the bottom of the galvanic scale to allow the electron attack to focus on something other than the aluminium housings.


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