[Mgs] Coolant draining on an MGB

[Charley Robinson]

You can get the old coolant out of the block by exchanging it for 
water.   A couple of fills and drains ought to do it.  Or you can do it 
by trickling water in at the top while letting it out at the bottom, 
with the engine warmed up and running, until it runs out clear at the 
bottom.  Then shut it down, drain it as completely as possible, button 
it up and refill it with the coolant of your choice*after it cools down. 
*I used to flush out rusty coolant this way when I was into flipping 
cars to raise hobby money.

CR

On 5/9/2019 2:28 AM, PaulHunt73 via Mgs wrote:
> 
> Even if you remove the radiator altogether the block is still half 
> full of old coolant, and removing the water pump doesn't get much more 
> out.  Remember the original poster was asking how to get the bad 
> coolant out. Having a drain point on the rad is convenient for a 
> simple drain and refill, but that's all.
> You can drain a roadster cleanly without that by shoving a piece of 
> card under the hose and past the cross-member over a bowl, slacken the 
> hose clip and push it right back, then push a blunt screwdriver up 
> between hose and rad port.  It only trickles out, but I leave it to do 
> that while I get on with the next phase of the job.
> PaulH.
>
>     ----- Original Message -----
>     On my '76B, with '77 engine, there is no drain valve. You have to
>     pull the lowest radiator hose off the water pump to drain the
>     coolant. It's a mess. Need a really wide pan on the ground
>     underneath, and even then it tends to run along the front
>     crossmember and steering rack and make a mess.
>
>
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