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Cooling Leak Mystery

To: mg-t@autox.team.net
Subject: Cooling Leak Mystery
From: "Scott Allen" <s4usea@hotmail.com>
Date: Mon, 11 Sep 2000 01:20:12 GMT
All,

Here's a new one, and I'll beg the group's indulgence while I get to the 
point...

I've been gone for a few weeks for my annual reserve duty, and when I return 
my girlfriend points out that the TD's been leaking coolant.  She'd put a 
pan underneath the car to catch it, and was emptying it back into the 
radiator daily.  I had driven it over to her house the day before I reported 
in, and left it there while I was gone.  She reports that there was a "huge" 
puddle under the car the next morning.

At about 1:30 this afternoon I top off the coolant, it takes almost a whole 
gallon, which means that it lost almost a gallon the first night after I 
parked it, (say over the 12 hours or so from the time I dropped it off and 
when she got up to walk her dog).  I put the pan back underneath the car and 
the leak does seem pretty aggressive; when I check it again around dinner 
time there's maybe a few pints in the pan.

After some inspection I determine that the leak is from the bottom of the 
water pump, travelling down the motor mount plate on the right side on the 
front of the engine and down the oil pan onto the ground.  Since there's no 
coolant on the back of the pully I  assume that the bearing's aren't leaking 
or that the carbon seal hasn't gone.  I figure that the gasket has failed 
and I need to replace it.

I still have to get it home, so I make sure that the radiator's topped off 
and head out.  It takes me about a half hour to get home during which the 
engine temp gets to about 70deg.  When I get home I put a pan under the 
engine and get ready to order some new gaskets from Moss.

So here's the rub:  Some four hours later I need to get something out of the 
car and decide to check the pan.  There's no coolant in it!  I check the 
radiator and it's still topped off.  I check the right side of the engine 
and there's no coolant conga line heading towards ground.  I had to pinch 
myself to make sure I wasn't dreaming.

I still plan on pulling off the water pump and replacing the gasket at the 
very least, but has anybody on the list had a similar experience?  If so, 
what were you dealing with?

Still scratchin' my head,

Scott Allen

'52 TD
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