Mark, sounds like you have a servo problem, and if you have some white
smoke from the exhaust, starting from rest, that is the brake fluid
being sucked out of the vacuum can of the servo.
Also look at the carpet under the clevis pin for the MC, and see if the
MC is leaking into the car from the rear of the MC.
You can do a rebuild, if you take your time. White Post will sleeve,
and rebuilt your servo for about $500, if the bores are gone.
If you switch form DOT 4, to silicone, then you must disassemble the
entire brake system, and make sure that the old fluid is completely out.
Otherwise, you will have a soft pedal.
DOT 4 is fine, just don't expect it to last 35 years. Change fluid
every 2 years. Remember, its your brakes.
Larry
laceyf@crosslink.net wrote:
>
> Help:
> I have been seeing a slow leak from my master cylinder for quite a while
> now, and I always check it before I take it for a spin. 1966 MK1A Tiger. The
> other day I didn't, since I was going for a very short spin. I drove it out of
> the garage and down the road and soon put my foot on the brake and it went to
> the floor with no stopping, not a chance. I'm glad it's not an automatic. Got
> it back into the garage safely and checked the brake fluid storage, empty
> (like my head) Ha! Ha!. Now they have to be bleed, 2 person job. I've never
> seen fluid from lines, wheel cylinders or disks on the floor or carpet I park
> it on, I've looked allot. It's got to be going somewhere. Is it maybe going in
> to the Servo? I have a stock car with original servo, master cylinder
> (rebuilt). I noticed that the fumes of the engine when I got back smelled sort
> of like molasses burning. Kind of strange and sweet at the same time. If it is
> getting into the servo and then the engine with the one-way pipe to the Intake
> Manifold, what should I do about it? Rebuild servo? If this is the problem who
> rebuilds them for Tiger owners? Is this something I could do myself? I've
> always felt more comfortable lightly pumping the brakes when I come to a stop.
> I didn't have fade, just not firm brakes. If the fluid is going into the
> engine, will it hurt the engine, one mechanic told me it should just burn up
> with no concern, as long as it's not too much. I'd just like to maybe get it
> fixed for the last time. I'm using DOT 4 from Napa. I'll need to buy more now.
> I tell people I use Dot 4 and they say "oh silicone." I thought Dot 4 was for
> most British cars and not silicone. Can you clear me up about this also?
> Thanks to all replies in advance, Mark in Va.
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