[Healeys] Block Porosity

[Bob Spidell]

I just had to put a new head on one of my tractors. With the new head I 
had a small coolant leak at the back; my mechanic would have checked the 
new head for flatness, but it leaked with the old head so I assume the 
block isn't flat (of course I used a new gasket and the sealant Norman 
Nock recommended for 100 heads). Anyway, I had the 'opportunity' to try 
several of the sealants, the one the finally worked--for the time 
being--was this one (Blue Devil didn't work):

https://www.amazon.com/K-Seal-ST3501-Permanent-Gasket-Repair/dp/B00QYZIVA6/



On 1/7/2025 10:35 PM, Alan Seigrist wrote:
> Hi Roger -
>
> I almost hate to suggest this, but have you tried stop leak / aluma 
> seal?  It works very well, just the trick is to make sure you flush 
> the cooling system out and replace with fresh coolant after the 
> leaking has stopped (to prevent the leftover stop leak from plugging 
> other stuff up over time.
>
> Best,
>
> Alan
>
> On Wed, Jan 8, 2025 at 1:14 PM Roger Grace <roggrace at telus.net> wrote:
>
>     Looking for some pearls of wisdom from the more experienced among
>     us. Very frustrating as the car runs so well with good oil
>     pressure and compression.
>     After many months of tests and checking have established that the
>     block on my BJ8 has the porosity issue. This is not the well known
>     oil into water but water into oil. (after 1000 mi, 3300ppm into
>     oil) I did find an area behind the center tappet cover where water
>     was oozing into the drain back from the rocker. Did my best to
>     repair it with epoxy from the outside. No doubt it is leaking
>     there or some place else. Fellow lister Wayne Schultz had the
>     identical problem.
>     My query is if there is a known solution to this problem ? resin
>     impregnation ? or maybe a modern treatment ?
>     Also have located some replacement blocks but how to test ? and be
>     assured that these old blocks also don't develop the same problem ?
>     Changing blocks invariably means a complete engine rebuild.
>     How common is this ?
>     All very painful.
>     rg
>
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