Master Cylinder Push Rod

[Red63440]

When I changed out my single pot master cylinder I noticed there was a short bolt screwed into the end of the rod. Just wondering if that was what was supposed to be there. I will be doing a disk brake conversion in the near future and if what I saw wasn’t right I would like to change it, the car is a 1964 Plymouth Fuey.
Thanks!

 

[hunt2elk]

When I changed out my single pot master cylinder I noticed there was a short bolt screwed into the end of the rod. Just wondering if that was what was supposed to be there. I will be doing a disk brake conversion in the near future and if what I saw wasn’t right I would like to change it, the car is a 1964 Plymouth Fuey.
Thanks!

Sounds like an adjustable pushrod?

 

[Red63440]

It appeared to have the original MC on it so I don’t have a clue….

 

[Nate S]

Do you mean on the pedal end? The ‘64’s have that projection to bump the brake light switch. A later rod might need something to add length to do the same.

 

[dadsbee]

Where pictures help...

 

[Red63440]

No this is on the master cylinder end not the pedal end. The rod is threaded and I assumed (yes I know) that the adjustable end would be ground to fit into the hole in the piston of the master cylinder instead of just a hex head bolt. Sorry, no photos, just use your imagination
Nate, what was on the end of the rod in your 64?

 

[R/T Boy 67]

If you have power brakes, it is normal for the end that sticks out of the booster, to have that adjustment.

 

[Red63440]

If you have power brakes, it is normal for the end that sticks out of the booster, to have that adjustment.

Should it just be a flat hex head bolt or should it be an acorn head that will actually fit into the MC piston. I also forgot to mention that this is on a power brake car.

 

[R/T Boy 67]

It should be the same shape as the recess in the piston.

 

[Red63440]

It should be the same shape as the recess in the piston.

Probably lost a long the way, will need to get something that fits.

 

[EARLY B]

Probably lost a long the way, will need to get something that fits.

Go to BREWERS performance web site they have photo's and descriptions of the different year push rods.

 

[Fran Blacker]

If you have PB there's an acorn nut on end of rod to adjust the clearance to the MC piston.

 

[Red63440]

If you have PB there's an acorn nut on end of rod to adjust the clearance to the MC piston.

That nut is gone, in its place is a short hex head bolt locked with a nut?

 

[Red63440]

I checked Brewers and they don’t have one available for 64 power brake system, just manual. Is that a nut or a bolt with a acorn shaped end locked with a nut?

 

[Fran Blacker]

If you have bolt in there now find out what the thread is. Buy an acorn nut and a short screw. You need to make sure acorn nut fits hole in MC. It acorn nut fits cut head off the screw loctite cut end into acorn nut . Done.

 

[Red63440]

If you have bolt in there now find out what the thread is. Buy an acorn nut and a short screw. You need to make sure acorn nut fits hole in MC. It acorn nut fits cut head off the screw loctite cut end into acorn nut . Done.

Let me ask this, could I use an Allen head bolt with the correct threads and then round the end to fit into the MC?