[TR] Pistons Sticking - HS4 Carbs

[Nolan]

Take the cap off, with the piston and spring.

Flip it over on the work bench.  Push the piston down to the bottom (top if 
it was right side up), let go, and watch it rise.

It should smoothly and steadily rise up and out.  In which case you know the 
problem is with the needle fouling the jet.  Bet it off center or bent.

If the piston does not rise smoothly and steadily up and out of the cap, the 
problem is in there.  This is almost always unrepairable, and best dealt 
with by replacing the assembly.

If you're feeling curious, you can do both pistons at the same time.   They 
should rise and pop out together at the same time.  Well, almost exactly the 
same time.  In good shape, it's very close.



----- Original Message ----- 
From: "Tom Wagner" <tom.wags at gmail.com>
To: <triumphs at autox.team.net>
Sent: Tuesday, March 11, 2008 5:34 PM
Subject: [TR] Pistons Sticking - HS4 Carbs


> To All:
>
> Can someone let me know where to start looking for a piston sticking
> on HS4 carbs.  I have checked the oil level in the dashpot and also
> cleaned the inside of the chamber, along with the needle on the end of
> the piston.  This is on a 67 MGB, but I know there are some out there
> that have MG's that might be able to help me out.