• Hey Guest!
    British Car Forum has been supporting enthusiasts for over 25 years by providing a great place to share our love for British cars. You can support our efforts by upgrading your membership for less than the dues of most car clubs. There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Upgraded members don't see this banner, nor will you see the Google ads that appear on the site.)
Tips
Tips

TR2/3/3A TR3 Master Cylinder Box Mounting

Share this page

Tinkerman

Tinkerman

Darth Vader
Offline
Mornin All, I'm getting ready to mount the Master cylinder mounting box on the firewall of the body. Methinks I should seal it in some way any, thoughts on that? I could use black gasket silicone or is there some other stuff that would be better?

As always, thanks for your thoughts.

Tinkerman
 
You could use an old inner tube and cut a gasket to fit it. Just an idea.
 
I am getting close to that point also. It looks the factory used some kind of tar/seem sealer product. Maybe some asphalt emulsion stuff in a tube would work and mimic the factory stuff and it is cheap. The factory probably had tar stuff in a bucket and used a stick. Going to a body shop supply store for me is always a challenge because it seems like they are selling so many products that it reminds me of buying fishing lures. They have stuff that cost 15.00 bucks a tube. I think I am going to use some middle of the road black 3M product.
 
I didn't use anything on mine. Why do you feel you need it ? Makes it easier to remove next time too. Same for the little 4 inch square plate that's held by 4 sheetmetal screw at the back of the box. So for the few miles I ever drove in the rain, maybe I got my knees a bit wet. So ? ? ?
 

Attachments

  • 15837.jpg
    15837.jpg
    58.9 KB · Views: 230
FWIW, I was thinking about putting something in there too, mostly to act as an air seal against the pedals. Probably not a big concern for you, Don, but here in the warmer climates, it's a Good Thing to keep as much engine air out of the passenger compartment as possible.

Not shown in any factory diagrams AFAIK, but I've had several cars with the remnants of some sort of material in that area.
 
The reason I mentioned old inner tube rubber is that on my tractor (that has an enclosed cab), the fender mounted controls are wide open to the ground. In the winter cold air is sucked through by the fan. So I mounted the controls through a rubber sheet that I slit for the controls to move. It keeps out the cold air quite well in the cab.
 
Now that, does make sense Peter.

Thanks, Tinkermman
 
I used a black flexible sealer when I installed mine. Water does get onto the bulkhead if you drive the car in the rain and it will drip through there if it isn't sealed. The sealer will also help to reduce engine noise into the cabin. It is amazing what a difference can be made by sealing every hole in the bulkhead.
 
Get a piece of self adhering EPDM flashing from a roofer supply (or find a roofer and see if he has a piece he will give you). Rubber has an adhesaive backing with a peel off. Apply to the bottom of and trim around the box (not the the fire wall), cut slits for the pedals, punch or cut holes for the mounting bolts, and install the box. This will function as a gasket between the box and fire wall and the box can be removed without the hassel of other types of caulking. Plus it can't be seen and can be reused.
 
Back
Top