How can I tell what... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

muckyp · 01-31-2011, 12:24 AM

year model front suspension/brake sytem I have on this truck? I can't get the brakes to bleed so I have surmised that the master cylinder must be bad, but I cannot figure out what the proper master cylinder for it is. Is there something I look at to see what year model it is? It is 5 lug and disc up front, other than that, I don't know what else to look for. I have attached some pictures to see if anyone can id this master cylinder.

1low · 01-31-2011, 12:27 AM

looks exacltly like the one on my 72 i would just take it in to the parts store and start opening boxes. good luck

muckyp · 01-31-2011, 12:37 AM

I guess I should have told you, that I did that today for a while. The parts guy checked 69 through about 80 and none seemed to match up. I thought that the previous owner told me that he had converted the front end to a mid 70's but the master cylinder the parts guy showed me did not seem to match.

1low · 01-31-2011, 12:41 AM

As long as the hole in the back is the same depth and the line fitting are the same size they are pretty universal

Longhorn Man · 01-31-2011, 12:41 AM

Go and ask your parts guy if a 73 - 77 is the same P/N. That would cover "mid 70's", and I'll bet they are all the same. Yours may not be the same brand as what your parts guy has.

**mr48chev** · 01-31-2011, 01:10 AM

It looks exactly like this one http://www.napaonline.com/Search/Det...+50014+2014024

Which has a 1-1/4 bore and fits a 71 C-10 along with others. As 1low said, check the depth of the hole in the piston to be sure they are the sa^^e.

sameyrasmea72 · 01-31-2011, 01:41 AM

Does the one you parts guy has look like any of these? Like stated earlier, I think there are several styles that could be used. Your parts store probably only offers one style.

sameyrasmea72 · 01-31-2011, 01:42 AM

The one pic in your original post is the one I have seen most often.

nickp51chevy · 02-01-2011, 01:28 AM

Quote:

Originally Posted by sameyrasmea72

The one pic in your original post is the one I have seen most often.

I had to find a new gasket for mine like that one. Talk about a pain.....turned out the only one that fit was a f@&d part number... Those master cylinders are for our trucks right?

muckyp · 02-01-2011, 12:53 AM

As usual you guys were correct. Napa had the correct one for a 72. They had a couple different models for the same year model. Thanks again.

01-31-2011, 12:24 AM	#1
muckyp Registered User Join Date: Mar 2001 Location: Forney, Texas Posts: 290	How can I tell what... year model front suspension/brake sytem I have on this truck? I can't get the brakes to bleed so I have surmised that the master cylinder must be bad, but I cannot figure out what the proper master cylinder for it is. Is there something I look at to see what year model it is? It is 5 lug and disc up front, other than that, I don't know what else to look for. I have attached some pictures to see if anyone can id this master cylinder. Attached Images __________________ 70 SWB 454/TH400

01-31-2011, 12:27 AM	#2
1low Registered User Join Date: Feb 2010 Location: Moyie Springs ID. Posts: 160	Re: How can I tell what... looks exacltly like the one on my 72 i would just take it in to the parts store and start opening boxes. good luck

01-31-2011, 12:37 AM	#3
muckyp Registered User Join Date: Mar 2001 Location: Forney, Texas Posts: 290	Re: How can I tell what... I guess I should have told you, that I did that today for a while. The parts guy checked 69 through about 80 and none seemed to match up. I thought that the previous owner told me that he had converted the front end to a mid 70's but the master cylinder the parts guy showed me did not seem to match. __________________ 70 SWB 454/TH400

01-31-2011, 12:41 AM	#4
1low Registered User Join Date: Feb 2010 Location: Moyie Springs ID. Posts: 160	Re: How can I tell what... As long as the hole in the back is the same depth and the line fitting are the same size they are pretty universal

01-31-2011, 12:41 AM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: How can I tell what... Go and ask your parts guy if a 73 - 77 is the same P/N. That would cover "mid 70's", and I'll bet they are all the same. Yours may not be the same brand as what your parts guy has.

01-31-2011, 01:10 AM	#6
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,721	Re: How can I tell what... It looks exactly like this one http://www.napaonline.com/Search/Det...+50014+2014024 Which has a 1-1/4 bore and fits a 71 C-10 along with others. As 1low said, check the depth of the hole in the piston to be sure they are the sa^^e.

01-31-2011, 01:41 AM	#7
sameyrasmea72 Senior Member Join Date: Aug 2003 Location: Lubbock, Texas Posts: 2,443	Re: How can I tell what... Does the one you parts guy has look like any of these? Like stated earlier, I think there are several styles that could be used. Your parts store probably only offers one style. Attached Images __________________ 72 Cheyenne Super 80 Silverado Blazer 2wd

01-31-2011, 01:42 AM	#8
sameyrasmea72 Senior Member Join Date: Aug 2003 Location: Lubbock, Texas Posts: 2,443	Re: How can I tell what... The one pic in your original post is the one I have seen most often. Attached Images __________________ 72 Cheyenne Super 80 Silverado Blazer 2wd Last edited by sameyrasmea72; 01-31-2011 at 01:45 AM.

02-01-2011, 12:53 AM	#10
muckyp Registered User Join Date: Mar 2001 Location: Forney, Texas Posts: 290	Re: How can I tell what... As usual you guys were correct. Napa had the correct one for a 72. They had a couple different models for the same year model. Thanks again. __________________ 70 SWB 454/TH400



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