Got pump put bk on.  Poured in some AF into the pump.no sign of leak but only poured in bout 2 or 3 quarts.down the crossover tude directly into pump.  Dnt kno if that will indicate further leak or not but thought worth a try before re hooking everything bk up.

Regardi g fat o ring.  I had a little bubble up there on first fill up, wondered if two would work.  Anyone tried that? 2 w sealant?

Kom

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Kim

i used two O rings and Permatex on mine many years ago with no problem since 

 Do Keep in mind that the cooling system is under some pressure after the car is running and  that will push AF out of a gasket even with what you did by pouring it thru the pump which I think did not show you much regarding it possibly leaking in the future per that test 

If the leak should pop up unexpectedly during the start up you can loosen the rad  cap  one notch ( the cap will still stay on ) to reduce the pressure in the coolant system and run the car that way for a period of time 

The engine may run —-a little hotter with the rad cap open but not much of an issue otherwise 

That should get you thru your start up if the leak shows itself then 

Wishing you some god luck ( meant— good luck —but thought that was a funny thing to happen ) regarding the leak repair  and  the future  the start up 

Enjoy 

Yes,  i nvr got it started and the leak was coming out of bottom of seal.  Unless pressure builds during filling, shoukdbe any pressure shouod therr?

Other thing is, these are like fat little do nuts, as opposed to  a sk8nny little o ring.   . 2 is ok?  Less goop

Yes they are fat thick O rings and I used two myself 

There is no pressure when filling ( pouring fluid in )
Only when running engine for a bit and AF is getting hot 
What you are experiencing are the block and heads  filling with AF you are pouring in until it rises inside the block up to the O ring  that was leaking and then  has come out the O ring  which of coarse is at the  top of the engine so most of the AF has been put into the engine at that point 

If you pour AF into the cross over tube( down the thermostat hole )  until it is full to the top —-the level will then be above the O ring joint in the cross over tube so you will then know if it leaks— with no internal engine pressure being applied which is  then a good chance it could hold when the pressure is then applied but no guarantees  until pressure tested 

Enjoy 

I dealt with the same leak when I changed my water pump a few years ago. Rather than using 2 O-rings, I turned a sleeve that fit on the crossover tube fitting and forced the O-ring down into the water pump and it worked great. I think I ended up making it about 1/8" thick. You could probably get the same effect by using washers if you can find some the right size.

Ok, thanks

Well, i got it put back togeterher up through the crossover pipe.   Filled it up,to bout inch from top of radiator.  No leaks, albeit not under pressure. So late today or tomorow,  hv to get oil parts back on, and starr tonight ir tomorow.   

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