Repair of corroded engine block with JB Weld

[kbogach]

It worked great.  The surface where WP's  is bolted looked beautiful and 
silky smooth after filing..  Thanks for advise.  I would not dare doing 
that without an advise of experienced people because I would be afraid 
of thermal expansion/contraction effect.    Silicon sealant does not 
work well because you have to move the pump to adjust timing belt 
tension.  .

Thanks all,  John Larson and Dave Kase  especially.
Konstantine.

Dave Kase wrote:
> This is a good idea. 
>
> When you file, lay a single cut flat file flat on the surface and use 
> a circular pattern to smooth it out.  I also use a liquid with this (I 
> use Purple Power - somehow a cleaner seems to be the right thing to 
> use).  Just spray the area as you are filing.  This helps keep the 
> file and surface clean.
>
> Once you get close to fully smooth I switch over to a sharpening 
> stone.  Again with the circular pattern and spraying with a cleaner as 
> you go.  I use the stone method for cleaning any machined surface 
> prior to assembly - it works great.
>
> As far as a wider seal - someone was doing this on 20v -7A water 
> pumps.  I don't agree with this method.  Once you have a smooth 
> surface, just coat the o-ring with Vaseline or other clear grease and 
> install it in the water pump groove.  This will allow the pump to 
> slide on the surface without pinching the o-ring.  This is a regularly 
> used method in the aircraft industry to minimize o-ring pinching.
>
> Good luck,
> Dave Kase
> A&P licensed mechanic (now mechanical engineer)
>
>
> kbogach wrote:
>> That's is a great news for me that JB Weld can be used to  this.   Thank 
>> you. 
>>
>> Konstantine
>>
>> John Larson wrote:
>>   
>>> You asked "
>>>
>>> Any comments will be greatly appreciated. Anyone machined WP's gasket 
>>> groove for thicker gasket?  How much it can cost in a machine shop?   
>>> The surface on block is pitted and I have to use hight temp silicon 
>>> gasket goop.  Last time it held 2 years only."
>>>
>>> I can't address the alignment issue today, but there's a simple, if a 
>>> bit time consuming, solution for the block erosion behind the water 
>>> pump.  After getting it REALLY clean, apply a coat of JB Weld to the 
>>> pitted area (use the regular, not the fast drying type), let it cure 
>>> for 24 hours, and carefully file it flat.  Clean it off well, and 
>>> apply another layer if necessary.  It works.  BMW authorizes this 
>>> technique for pitted cylinder heads, and I do it to Vanagon heads all 
>>> the time.  RTV, BTW, is a really poor way to fix ANY kind of leak.  Be 
>>> sure to use the correct phosphate free coolant after the repairs.  
>>> Good luck, John
>>>
>>>     
>> _______________________________________________
>> quattro mailing list
>> quattro at audifans.com
>> http://www.audifans.com/mailman/listinfo/quattro
>> ---
>> Watch this space for ads :)
>>