[TR] TR3/TR4 block drain valve?

[Allen Hess]

The block drain valve is the same as the radiator drain valve (or  
should be) and you can get a much better look at that one. I recall it  
being substantial enough that it should come out without much trouble  
but the usual "proceed with caution" applies. I think it is more  
likely that the drain lever will be stuck. It is a taper held in the  
body with a spring, washer and cotter pin. You may be able to tap it  
from underneath and free it. Removing the valve from the block  
provides a larger hole for the crud to come out and you can bend a  
stiff wire (coat hanger) to loosen the crud towards the rear of #4  
cylinder. As usual, been there, done that.

Allen
On May 19, 2013, at 2:00 PM, triumphs-request at autox.team.net wrote:

> How sturdy are the block drain valves?  The one on my TR4 is  
> clogged.  I've
> been hesitant to remove it, fearing that it would crumble into  
> pieces and
> screw up the threads.  Too many bad adventures with home plumbing  
> have left
> me gun shy.