MG MGB and MGB GT Tech Talk
I want to add a second ground strap in addition to the engine ground strap, somewhere
from the tranny to the frame. Photos, drawings, complete descriptions would be great.
I’ve seen posts before regarding this but couldn’t seem to locate any with the
specifics, like; do you use existing fittings (nuts/bolts) or drill and fit new connections?
Thanks,
Ted
I'd use existing bolts but make sure to use serated washers to get through paint etc to make good contact with steel. That's also the method suggested by Rick Astley in his book about MGB electrics.
The factory used 2 locations.
Chrome bumper: On the engine, the strap went from the mount bolted to the engine around the mount and to the frame where the mount bolted on the car.
Rubber bumper: On the trans from the bolt that holds the mount to the trans and then to the trans crossmember.
Why not do the easy thing and add a second strap on the other motor mount? It'll work well and there are no electrics in the transmission (unless you have an OD).
B-racer Wrote:
B-racer Wrote:
Actually, the very best thing to do (on lots of older cars, not just MGs) is to run down to your local auto parts emporium, buy a generic (black) ground wire of sufficient length, and attach it to the engine/tranny on one end, and the battery's ground terminal at the other end. A direct, unimpeded path to ground from the engine will cure a host of starting and charging problems.
B-racer Wrote:
Just something from the back of my head form my car audio days - adding a second ground strap might create a ground loop which might interfear with radio reception etc.
I did another, slighly different ground.I bought a red cable and ran it from one of the thermostat studs to the car body. Why? It's in my face to remind me to check it if I ever have electrical problems. And it's more accessible to remove, clean and tighten if I ever need to! :)
So, why do you want to do this 2 strap thing again?
Sounds like a good idea, but I'm having trouble pin pointing exactly why.
Starbuck Wrote:
Dielectric grease is too a conductor, but only when very thin, hence the term DI-electric. When thicker it insulates.
Vaseline isn't a conductor per se but when you mash down the connection with star washers it won't matter.
DanN1DLH Wrote:
that's what I'm thinkin....doesn't mean I won't be doing it this week-end, though : )
mjamgb Wrote:
Bob -
I stand corrected and abashed. Once again a cherished assumption has been blown clean out of the water ;)
I LOVE these forums.
No need to feel abashed.
This forum is a tremendous help to me and hopefully others feel the same way.
I'm just trying to play a part and carry my weight.
Bob