Replacing Brake Master Cylinder - CJ2A with 225

How difficult will it be to replace the master cylinder? (stock '46 brake cylinder, but 225 V6 instead of stock engine) I do not want what should be a 1/2 hour job turn into all day. (trying to get ready for event this weekend, would like this leak fixed, but don't have a lot of time)

My concern is that the front bolt appears to go all the way thru the frame, which would make it approx. 5" long. The 225 bellhousing is only approx 1.5" from the head of bolt, so the bolt could not be pulled completely out.

I don't want to remove the brake lines etc. only to find out that I might have to move the engine to get the bolts out.

Any thoughts? If this will be a problem, I will wait until after the weekend, and carry a can of brake fluid. : )

 

What time ya goin on sat? we got to take care of the farm then on our way, hopefully around 10-10:30

 

The whole day is for Jeepin' . . I was thinking we were going earlier than that, but it would be fun to "caravan". Need help on the farm? Might be something interesting for my co-pilot.

 

why not just grind that bolt off,
get a new one,
and put the new one in from the frame side in?
so the nut is towards the bell and not the bolt head.

Make sure to bench bleed the MC, it will make it easier later

Also,
If you can delay it, I would get the dual cylinder master cylinder from herm,
It has 2 sections to it, one for the front and 1 for the back,
So if you pull a brake line in the front, the back brakes still work.

Thats my plan, seems like a good safety upgrade.

-Eric

 

Eric . . Somehow I missed your reply, until today.

As it turned out, I did not risk doing any work on it before the event. Today, FINALLY, I got some time to replace the master cylinder. It was not as bad as I thought, because the bolt in front was NOT all the way thru the frame. The master cylinder has threads in it. There is a short bolt from engine side, and a separate bolt thru the frame from the outside. (the reason I thought it was one bolt, was that a PO used a socket-head bolt from outside, and with all the crude on it, I thought it was the end of a bolt from the inside. haha)

Bottom line: No problems replacing a brake master cylinder in 225 V6 CJ2A

Concerning bleeding, I used a vacuum pump on passenger rear bleed screw. The pedal was so tight after that one wheel cylinder, I did not even fool with the rest of the wheels.

"Some day", I plan to replace the engine, swap to a SM420, and other upgrades. When I do, and have the body off frame, I am highly considering a dual master cylinder then.