im looking for information on how to rebuild an olds 403 motor and not having any luck can you help me?

Question

im trying to rebuild a big block 403 motor but i cant seem to find any information on it anywhere... ive even tryed parts store i thought there might be a web site i could go to . any information will help.

Answer 1

1977-78 Olds Oldsmobile 403 V8 Engine Rebuild Kit
http://cgi.ebay.com/ebaymotors/1977-78-Olds-Oldsmobile-403-V8-Engine-Rebuild-Kit_W0QQcmdZViewItemQQcategoryZ33620QQitemZ7991077100QQrdZ1

Answer 2

A motor is a motor. If you can rebuild one you can do another. The cubic inch is not the problem, knowing what you are to do is the problem. What I do when faced with a project that I don't have instructions on, is to take notes, mark parts as to the direction they go, and take plenty of digital photos of the assembly as it is torn down. Things to watch for is; direction a part is turned (front, back, side), special made bolts, special length bolts, to have a plug or not to have a plug in oil galleys, and bagging and labeling each part, along with the bolts it used. Be careful of bolts that are too long or short, as this can cause a big problem. I believe if you search for a book on a big block 400 you will find your motor. Some motors were called a 400 when they were actually a 401, 402, 403, and so on. Example: I have a 355 chevrolet engine, but it is a 350 bored out. If you don't know this, then you don't know what to buy do you? Talk to the dealer, and get a list of all the big block engines that were put into an olds. Pick the cubic inch that is close to yours, and you know what book to buy. Some were considered a 400 and some were considered a 400 tall block called a 403. Rod length, and piston height is important. Make sure you get the right ones, or the piston will sit too tall and you will have problems. Piston to valve clearance is very important. Like I said; an engine is an engine! Good Luck!

Answer 3

Get a factory service manual for the year and model of car your engine came in. Even one for the wrong year should be all right if the 403 was available then. This is the information the factory gave to their dealers, and will have very detailed specifications.

Still, the factory service manual presumes the mechanics have a fair amount of knowledge to begin with. If you're a newbie, you may want to get a basic guide to engine rebuilding at your local bookstore, too.