Saturday, 31 May 2014

Chassis:
In the main, the chassis is not too bad, some areas of rust to be treated and both rear spring hangers will have to be replaced as they have rusted away.



  The holes you can see in these pictures were filled in with fibreglass and then undersealed, not very clever in my opinion. Both spring hangers will be cut out and replaced with new.   
 Started work on the rear spring hangers today, I cut away the off side, and a pile of rust came falling out.
 Old spring hanger compared to the new one.
I am deliberately fitting a chrome bumper rear spring hanger in place of the rubber bumper one, to reduce the ride height.
 This is the new rear MGB spring hanger held in place prior to welding. The spring hanger is a Steelcraft one, and therefor doesn't fit, it has to be cut and tweeked to get it in the right place, even then the shackle hole is one centimeter further forward than the factory part.
I am also welding in reinforcements inside the join.
This is the fitted panel, including the boot side member, I had to make new angled section to fix it to the new chassis. I then painted inside the spring hanger prior to welding on the closing panel.
This is the completed spring hanger, with the new closing panel plug welded on .

  The near side spring hanger will also be replaced in the same way.
 The next stage is to clean all the sticky underseal off the underside of the MGB, however, trying to tackle it with a heat gun and scraper lying underneath it is next to impossible, so I set about building a Rotisserie.
 
 Here it is with the MG on its side, making the nasty job of cleaning the underseal off, a little easier. It took 5 or 6 evenings with the scraper, hot air gun and white spirit to get it to a reasonably clean state.


 Now that the bottom is totally clear of underseal and filler and fibreglass etc, I can see what needs doing. The rear spring front hangers I thought initially ok, but holes have now appeared, so I will cut them out and fit new ones, together with new Heelboard extensions. This is also a good opportunity to fit chrome bumper hangers, (as I have done at the rear) therefore giving me the correct ride height.
 








 The rear bumper stop chassis area on the right hand side has corrosion.I thought that I would make up some repair panels and fit a new bump stop, however, having thought about it a bit more, it seems that this bump stop section, is an addition fitted to the rubber bumper chassis, to lower the bump stop, but because I will be having the same ride height as the chrome bumper version, this added chassis section can simply be cut out, and new bump stop plates welded on, therefore overcoming the bump stop issue because of the lower ride height.


 I am in the process here, of cutting away the bump stop chassis section, and once it is cleaned up I will weld on the new bump stop plate.



The underside of the MGB is now fully repaired, and treated with Bonda Zink primer, ready for the next stage, I have yet to decide what paint/protection system to use.

 There was some corrosion on the n/s/f chassis end, so I decided to cut it out and make a new section.

 This is the box section with a flange and captive nuts for the bumper brackets.


This is the completed repair.


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