Master Cylinder Replacement

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Aug 7, 2008 | 01:27 PM

jb_montgomery

Thread Starter

4th Gear

Joined: Aug 2008

Posts: 3

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From: Gainesville Mo

Master Cylinder Replacement

Hi,

I am about to replace the brake master cylinder on a '70 w/o power brakes. The service manual says to disconnect the push rod from the brake pedal which appears to be difficult up under the dash -- not to mention getting the push rod connected again.

Is there any hope for MC replacement without disconnecting the brake pedal?

TIA, Joe

Aug 7, 2008 | 01:45 PM

BB427

Racer

Joined: May 2008

Posts: 323

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From: ********** New York

Yeah man I just did my 69 MC w/o power simple 15 minutes .
step1 put towel or cardboard under MC in car to catch any over flow

Step 2- Break the hard lines loose and disconnect from existing MC

Step 3 Remove the 2 nuts that are holding the MC on " there is
carriage bolts coming through the firewall they will stay once
nuts are removed. slide old mc out .REMOVAL IS COMPLETE

Step 4 Bench bleed new MC

Step 5 Mount MC ,Install hard lines Installation is done.

At this point if MC was bleed well on bench you shouldnt have to bleed brakes but it can hurt.

Aug 7, 2008 | 02:43 PM

Durango_Boy

Team Owner

Joined: Aug 2006

Posts: 24,125

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From: Columbia Missouri

Quote:

Originally Posted by BB427

Great walk-through.

Also, be careful not to get any of the brake fluid on your paint. It'll leave spots that you'll never get out.

Aug 7, 2008 | 04:21 PM

BB427

Racer

Joined: May 2008

Posts: 323

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From: ********** New York

Quote:

Originally Posted by Durango_Boy

Great walk-through.

Also, be careful not to get any of the brake fluid on your paint. It'll leave spots that you'll never get out.

Spots my *** some dribbled off my fender guard I didn't realize it sat for 15-20 minutes. When I wiped it with a rag it took the paint right off the car .

Aug 7, 2008 | 04:25 PM

Durango_Boy

Team Owner

Joined: Aug 2006

Posts: 24,125

Likes: 15

From: Columbia Missouri

Quote:

Originally Posted by BB427

Spots my *** some dribbled off my fender guard I didn't realize it sat for 15-20 minutes. When I wiped it with a rag it took the paint right off the car .

Has to do with the clear coat / thickness...I dribbled some one mine, don't really care about old paint anyway, and it just left bad spots.

Aug 7, 2008 | 04:33 PM

BB427

Racer

Joined: May 2008

Posts: 323

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From: ********** New York

LOL I was thinking about using it to stipp my car instead of plastic beading it. When I get ready to do the body off.

Aug 7, 2008 | 08:01 PM

jb_montgomery

Thread Starter

4th Gear

Joined: Aug 2008

Posts: 3

Likes: 3

From: Gainesville Mo

Thanks to all who replied. Just the info I hoped for, but could not quite believe the job would be so simple. I leaned long ago, when everything is going good, think about what you may have overlooked.

Anyway, should get the MC tomorrow & install over the weekend. Yes, I will be super careful with the paint -- it is a new paint job with not a scratch so far.

Thanks, Joe

Aug 7, 2008 | 08:06 PM

BB427

Racer

Joined: May 2008

Posts: 323

Likes: 0

From: ********** New York

yeah man becareful I would drop the old MC instead of lifting it out if you have a SB it should be no prob. I picked up my new MC for about $55.00 make sure to use a line wrench on the hard lines as they strip easy. And yes the long way is short way most of the time. GL bro