[Mg-t] Source of Rocker Arm Ass'y

[lawrie]

John,

I have, for many years, sent rocker assemblies from all the engines I rebuild to:

Rocker Arm Specialist 						  
19841 Hirsch Court
Anderson, CA 96007
530-378-1075

They do excellent work and their prices are very reasonable.

As for the carburetor problem, while Joe Curto may be correct in saying that pistons in normal driving do not rise all the way to the top, they were designed to be able to do so. Therefore, I believe, they should always be free enough that they can travel freely. Any sticking is not acceptable, IMHO. As well as the outer edge of the piston and the inner surface of the dashpot needing to be smooth, it is important that the piston tube and the steel center bore of the dashpot also be clean and smooth. I have often found rust or contaminants in the bore and at the bottom of the tube which impede the smooth travel of the piston. Sometimes the problem is also inside the piston tube where the damper rod fits. Clean all these parts carefully so that the piston can travel smoothly all the way up and down. Be careful not to sand too much material off the outer edge of the piston or the inside of the dashpot; a close tolerance fit is necessary for the vacuum to pull the piston up at the correct rate. Remember also that the jet has to be centered correctly for the piston to fall all the way to the bridge with a nice "click".

Lawrie Alexander

>  -------Original Message-------
>  From: Gunnellj at athenet.net
>  Subject: [Mg-t] Source of Rocker Arm Ass'y
>  Sent: 19 Jan '09 06:35
>  
>  Mates
>  
>     The rebuild of the MG TD engine is moving along well. The main problem is we keep saying "while it's apart, why not do this, too?" So the cost is going up as we add in a front end rebuild and rebuilt shocks. But if we didn't, you just know something would break the week after we put the car back together.
>  
>     A few weeks ago, when I asked about parts, someone mentioned a source of a completely rebuilt rocker arm assembly. We did that on the Magnette engine (sourced from Scarborough Faire) and it worked great. Who sources the XPAG rocker arm assembly?
>  
>     Anyone have experience with carb pistons that don't go all the way up in the bell (suction chamber)? Joe Curto says the piston only rises 3/4" to 1" and won't get stuck, but my mechanic says the car will have more power if the piston doesn't get stuckj when it goes all the way up. We are sanding the inside of the bell with 1000-grit paper. It takes a long time. Any suggestions?
>  
>  John Gunnell
>  Iola, WI