[TR] Leaking Push Rod Tubes on TR4A engine?

[J.C. Hassall]

On 8/18/2010 9:59 PM, Ben Zwissler wrote:
> I've got about 700 miles on my TR4A after its rebuild.  I've been 
> tracking down some oil leaks and it seems I've got oil leaking from 
> the push rod tubes in the head.  I reached that conclusion after 
> installing one of Justin Wagner's silicon valve cover gaskets and 
> degreasing the head.   Oil reappeared only around the pushrod tubes.  
> Anyone have experience with this?  I had the head gone over by a 
> machine shop - new valve guides, valve job, etc.  They cleaned it, but 
> did not hot tank it due to a prior experience with the tubes 
> dissolving.  When reassembling I did not add any sealant specifically 
> on the tubes.  Overall, the engine's not a horrible leaker but I'd 
> like it to be better.
>
> Thanks for any advice.  Ben.....
>
Ben, I think Jack Drews, of FoT fame, did a write up years ago about 
this problem.  He tried a number of solutions, including applying 
locktite stud sealer at the head/tube interface on the outside.  I think 
he mentioned that some folks have applied a bead of J.B. Weld (or 
similar) around the tubes on the inside of the head.  Try searching 
Tony's site (www. tonydrews.com).

hth

j

-- 
Jim Hassall
Blacksburg VA
'63 TR4 in autox preparation
99% finished, 90% to go