C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old May 12, 2011 | 07:42 PM
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Alright so last year, my grandpa decided his 71 stingray would be a good graduation present. The car had sat in his garage since I was 6 so you can just imagine the shape its in. The body is amazing except for one little ding. The mechanical stuff is where I'm running into issues. Today I spent 4 hours on what I thought was the solution to my brakes problem. I replaced the master cylinder and re did the brake lines then bled them but still no brakes. My pap offered his thoughts which was that the calipers are frozen but I have no idea what I'm doing with this car yet so all help and input is appreciated.
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Old May 12, 2011 | 07:57 PM
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If you have a solid pedal I would agree with your pap. If the pedal is soft, then I'd say you still have air in the brake lines.
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Old May 12, 2011 | 08:02 PM
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have you taken the calipers off and checked to see if you can move the pistons back and forth? If you can move them, and have replaced the lines, and MC, you may check the seals on the pistons themselves. I ran into this same problem, changed lines, MC twice and still could not get the brakes to bleed properly. I even used a pressure bleeder. Turned out the seals around the caliper pistons were cracked, would not let fluid out, but would let air in, and made it impossible to bleed the brakes. 4 caliper rebuild kits later and I was back in business, this was 5 years ago and all is still well. Let us know what you find.
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Old May 12, 2011 | 09:29 PM
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Yeah, sorry to say, but you are going to be replacing those calipers...or rebuilding them. I had to replace all four of mine, after the car I got sat in a garage for 8 years or so. Do yourself a favor...even if the problem seems to be just one caliper, replace them all. Otherwise, you'll likely be chasing break problems for a bout a year or so. Like I did.
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Old May 12, 2011 | 09:30 PM
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Oh, and WELCOME!!!! I hope you don't have a girlfriend, because these vettes can get jealous easily. They don't like it when you spend money on others, and they HATE it when you spend time with others, as well.
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Old May 12, 2011 | 09:39 PM
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Welcome your at the right place. Make sure you get yourself some manu als. Such as the AIM, shop manual, and anything else you can find as you can never have too much info. In a way your a lucky guy to have a grandfather to pass down such a car. Enjoy.
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Old May 13, 2011 | 04:53 PM
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Hi yg18
A new, old, 71 Corvette... NICE!!!!
If you're going to be doing some work on your car may I suggest you spring for 2 books that will be a big help to you.
First, the 71 GM CHASSIS SERVICE MANUAL, this book was used by the techs at the dealerships.
Second, the 71 GM ASSEMBLY INSTRUCTION MANUAL, this set of drawings was used on the production line in St. Louis where your car was made.
The first is about $35 and the second about $25.
They're well worth the money. Many of the larger vendors with ads on this Forum sell both books.
How about some pictures? It's always fun to see what people are working on!
Good Luck!
Regards,
Alan
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Old May 13, 2011 | 05:02 PM
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Ill post pics when I get the chance over the weekend. I checked the pistons but I'm just springing for the new calipers. Thanks everyone.
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Old May 13, 2011 | 05:15 PM
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Originally Posted by young gun18
Ill post pics when I get the chance over the weekend. I checked the pistons but I'm just springing for the new calipers. Thanks everyone.
Good decision. Get them from your local auto parts store and save some money for this type of common part.
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Old May 13, 2011 | 07:16 PM
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Yes Sir; Better buy them from someone who sells Lone Star as a re builder. I bought a set from a local, for my 1980, which were guaranteed for life. I've changed five calipers so far. On my 82 I bought Lone Star rebuilt. two years & they are still holding, No Leaks. Have a great one. Gene
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Old May 14, 2011 | 12:09 PM
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You may want to seriously consider getting getting remanned calipers that have been sleeved with stainless steel and maybe get a core credit for your old steel ones.
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