Rebuilding motor

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monzadon
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Rebuilding motor

Post by monzadon »

I need to rebuild my 140 motor and i have never done this before, is there a good manual with a step by step guide as how to do it
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terribleted
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Re: Rebuilding motor

Post by terribleted »

GM 1965 Corvair Chassis Shop Manual is a good place to start, has all the specs and most of the data you should need. Expensive preposition rebuilding a Corvair engine. I suggest having deep valve seats installed by a know reputable Corvair head specialist.

What is wrong with it that it needs to be rebuilt?
Corvair guy since 1982. I have personally restored at least 20 Vairs, many of them restored ground up.
Currently working full time repairing Corvairs and restoring old cars.
https://www.facebook.com/tedsautorestoration/

Located in Snellville, Georgia
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bbodie52
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Re: Rebuilding motor

Post by bbodie52 »

:goodpost:

This makes a good point. You should carefully examine the engine, run a compression test on each cylinder, etc. to learn all you can about the engine before you remove it and tear it apart.

In 1969 I was sixteen years old and successfully taught myself to rebuild a 1963 Corvair engine, carburetors, and the Powerglide automatic transmission using only the factory shop manuals (1961 and 1965) to guide me. I spent my summer vacation in our garage using my father's hand tools, floor jack and jack stands, etc. to carefully remove the powertrain and disassemble the engine, and later the transmission. (My father provided funds for parts and machine shop work, but he was out of town as his employer had transferred him from San Jose to Burbank (northern to southern California), so I was on my own).

My point is that it is possible to teach yourself. You have many advantages that I did not in 1969, such as Clark's Corvair Parts and other good parts sources, the Internet and support from websites like the Corvair Forum, and perhaps a local CORSA (Corvair Society of America) club chapter, depending on where you live.

The link below will provide you with a list of useful websites that are Corvair-related. Some of the links will lead you to an extensive technical library that will allow you to download shop manuals and other technical references in Adobe Reader (.pdf) format at no cost. There is also a link that will help you to locate nearby CORSA (Corvair Society of America) club chapters. While the Corvair Forum can be very helpful as you work on your Corvair, having local friends and contacts in your region who are knowledgeable about the Corvair can also be very helpful. These family-friendly CORSA club chapters often offer picnics, group scenic drives, technical training and assistance, car shows, and competition events that can greatly enhance your enjoyment of Corvair ownership. You will also find a list of essential Corvair parts suppliers.

Common and Useful Corvair Websites

:link: viewtopic.php?f=225&t=6007


:dontknow: I can tell from your previous posts that you have taken on a difficult project car and that you have years of body shop experience to help you. Do you have mechanical experience as well? Where are you located? I would like to encourage you to expand on your post and tell us more about yourself, as well as about your Corvair. Your personal assessment of your mechanical skills and abilities would help a lot. Members of the Corvair Forum love to be helpful in assisting other Corvair owners with technical support and advice, but it helps if we have some understanding of your technical background and mechanical abilities, your Corvair-related knowledge, etc. Helping us to know more about you, your Corvair, and your plans for your Corvair will help us to write comments to you that are tailored to your needs and experience. Knowing where you live also helps, as your location may suggest some possibilities or solutions. Detailed photographs of your Corvair, including interior, trunk, and engine compartment would be great!
Brad Bodie
Lake Chatuge, North Carolina
Image 1966 Corvair Corsa Convertible
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terribleted
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Re: Rebuilding motor

Post by terribleted »

I have seen many Corvair engine that people said needed to be rebuilt that did NOT need to be rebuilt just repaired and often only externally with carb, ignition, valve adjustment or lifter issues and oil leak fixes etc. I have also seen some that did need to be rebuilt of course like those with bad compression , broken rods, spun bearings etc. I have also seen many that only needed head repairs with the lower ends being excellent for re-use.
Corvair guy since 1982. I have personally restored at least 20 Vairs, many of them restored ground up.
Currently working full time repairing Corvairs and restoring old cars.
https://www.facebook.com/tedsautorestoration/

Located in Snellville, Georgia
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doug6423
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Re: Rebuilding motor

Post by doug6423 »

I’m going to have a 140 rebuilt just because I want that ‘new feeling’ lol!
Not that it’s a guarantee, but I’d feel better knowing everything is new. I plan to continue driving the car as an everyday car with the hopes of having it last a long time without doing major work. That said, I bought a brand new car years ago to avoid problems and had nothing but...


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65 Monza
Cincinnati, OH
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Re: Rebuilding motor

Post by terribleted »

I bought a lemon once myself
Corvair guy since 1982. I have personally restored at least 20 Vairs, many of them restored ground up.
Currently working full time repairing Corvairs and restoring old cars.
https://www.facebook.com/tedsautorestoration/

Located in Snellville, Georgia
monzadon
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Re: Rebuilding motor

Post by monzadon »

I checked the compression and i have a valve Open on two different cylinders, i plan on having both heads done and thought i would put new rings and rod bearings in, i have completely restored the car, it shows 72,000 on the speedometer, i already replaced the push rod o rings, i am a pretty good mechanic and i have 38'years body repair experienced
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terribleted
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Re: Rebuilding motor

Post by terribleted »

Open valve is almost certainly adjustment too tight unless it is associated with loud nasty noises as well. Why don't you try adjusting the valves before you spend thousands of dollars rebuilding the engine? Often low compression is caused by a slightly tight valve adjustment. If you replaced the pushrod seals adjustment issues are in fact likely as it is very easy to get them a little toward the tight side, and, the car only has 72K so it spent a ton of time sitting and getting gummy. Very likely a lifter or 2 has now freed up and is working more normally after the pushrod seals and that adjustment so they may indeed be pumping up a little more holding valves open. It is silly to jump into an engine rebuild until all basic (particularly simple things like valve adjustment) repair possibilities have been exhausted.
Corvair guy since 1982. I have personally restored at least 20 Vairs, many of them restored ground up.
Currently working full time repairing Corvairs and restoring old cars.
https://www.facebook.com/tedsautorestoration/

Located in Snellville, Georgia
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