My 1970 SIIA 109-inch’s rear floor reinforcing crossmembers are very corroded. Is it possible to fit replacements without removing the rear tub? I’d rather not remove it, as I’d not be terribly confident of finishing the job. Also, what’s the best tool for removing heavy rust on the chassis top rails? I’d like to smother them with anti-rust paint – as I’ve done with the underside/sides of my chassis – but want a good surface for it to stick to.
Also, when I was attempting to remove the rear dampers I got no further than finding that the entire top damper mount had sheared from the chassis on the nearside; further inspection revealed more holes in the top rails of the chassis, as well as other minor holes. Does anybody make replacement damper mounts? Both of mine seem past it.
George Mayson, Dundee
You can fit the floor crossmembers without completely removing the rear body but it’s easier all round just to
take off the body. This seems like a big job but it’s really quite straightforward and will make the repairs to the body and chassis a lot simpler, while giving you ample room to clean and paint everything.
Regarding cleaning the rust off the chassis, use a grinder with flapper discs instead of grinding discs. These are far less abrasive than grinding discs, so won’t cut into the metal, but far more effective than a wire brush.
I don’t know of anyone who makes rear damper repair sections for Series vehicles. You could have a word with the chassis manufacturers, as they obviously make them when they build a chassis.
However, I think your best bet would be to fit a half chassis, especially if there’s corrosion in the spring hangers.
This workshop advice appeared in the December 2015 issue of LRO. Back issues are available to download on digital devices here.