Fabricating MGB Alloy Radiator Expansion Tank

Using the left-hand drive brake assembly blanking plate area, I decided to use this space for the radiator expansion tank.  The original blanking plate was used as a template for the base, and a simple quadrangle shaped box was created. The bulkhead has 4 captive nuts already in place for mounting the tank.  The front 3 sides are folded from 1 piece and measure 3,4,3 inches wide, with a single 6 inch wide plate for the rear, The height  is 5.5 inches, plus just over an inch for the radiator filler neck. This gives a capacity comparable with the standard plastic bottle.

Worth the effort I think, much better than that plastic thing.

The weld on necks are available from DemonTweeks, page 192 of their Motor-sport catalogue.   Warning if you have a credit card your balance may not survive this experience.

Chrome bumper models may have the remote servo in this position and rubber bumper models with the servo on the pedal box may not have this blanking plate at all.

expansionplate.jpg (13200 bytes)

Blanking plate used as template for tank base.

Checking for size and clearance before welding.