How to change pistons?

[Raimonds]

Heyy, hello everyone! I need to change pistons on my 92 Mazda 323F, and i am wondering, wich is the best way to push piston pin out of piston, and how to get it back properly? I don’t have any fancy tools by the way.
Sorry for my bad language, i’m from Latvia. 😉

Topic

[yarddog1950]

I take them to a machinist. They have a bench top heater made for this purpose. Also they can check to see if the connecting rods need to be reconditioned, often necessary when replacing pistons.

[college man]

Its a big job.The heads need to come off.oil pan gets dropped.
pistons unbolt from the crank.then the piston can be removed out
the top.For you to replace just the pistons is a waste of time.
either get a salvage yard motor or a reman motor.It will cost more
in parts then what its worth.

[Raimonds]

Its a big job.The heads need to come off.oil pan gets dropped.
pistons unbolt from the crank.then the piston can be removed out
the top.

Already done that. I have all the parts needed, I simply wanted to know how to get piston pin out. I think I will simply bring my connecting rods and pistons to local shop. 🙂

[college man]

see if this helps you.:ohmy:

http://www.mazdabg.com/ftp-uploads/Mazda/323/engine-assembly.pdf

[Mikhail]

[quote=”raimonds100″ post=32195]

Its a big job.The heads need to come off.oil pan gets dropped.
pistons unbolt from the crank.then the piston can be removed out
the top.

Already done that. I have all the parts needed, I simply wanted to know how to get piston pin out. I think I will simply bring my connecting rods and pistons to local shop. :)[/quote]

You must take them to the shop if you want to switch them out. You’re putting oversize pistons on the rods right? You should , there would be no point in using same size pistons. Get some oversized pistons and rings and have the machinist bore our the block and you should have a good as new engine. just make sure its in specification, this is super important. Have the machinist measure the bore diameters to see if they are out of round or out of specification. If they are out of round or out of spec then oversized pistons are required.

Get a manual too, a Haynes or a Chilton.

[Mikhail]

[quote=”raimonds100″ post=32195]

Its a big job.The heads need to come off.oil pan gets dropped.
pistons unbolt from the crank.then the piston can be removed out
the top.

Already done that. I have all the parts needed, I simply wanted to know how to get piston pin out. I think I will simply bring my connecting rods and pistons to local shop. :)[/quote]

You must take them to the shop if you want to switch them out. You’re putting oversize pistons on the rods right? You should , there would be no point in using same size pistons. Get some oversized pistons and rings and have the machinist bore our the block and you should have a good as new engine. just make sure its in specification, this is super important. Have the machinist measure the bore diameters to see if they are out of round or out of specification. If they are out of round or out of spec then oversized pistons are required.

Get a manual too, a Haynes or a Chilton.

[Raimonds]

[quote=”college man” post=32197]see if this helps you.:ohmy:

http://www.mazdabg.com/ftp-uploads/Mazda/323/engine-assembly.pdf%5B/quote%5D

thanks 🙂

You must take them to the shop if you want to switch them out. You’re putting oversize pistons on the rods right? You should , there would be no point in using same size pistons. Get some oversized pistons and rings and have the machinist bore our the block and you should have a good as new engine. just make sure its in specification, this is super important. Have the machinist measure the bore diameters to see if they are out of round or out of specification. If they are out of round or out of spec then oversized pistons are required.

Get a manual too, a Haynes or a Chilton.

thanks for you’re awnsers :), it vas realy helpfull, i will give a update on how things are going

[Raimonds]

[quote=”college man” post=32197]see if this helps you.:ohmy:

http://www.mazdabg.com/ftp-uploads/Mazda/323/engine-assembly.pdf%5B/quote%5D

thanks 🙂

You must take them to the shop if you want to switch them out. You’re putting oversize pistons on the rods right? You should , there would be no point in using same size pistons. Get some oversized pistons and rings and have the machinist bore our the block and you should have a good as new engine. just make sure its in specification, this is super important. Have the machinist measure the bore diameters to see if they are out of round or out of specification. If they are out of round or out of spec then oversized pistons are required.

Get a manual too, a Haynes or a Chilton.

thanks for you’re awnsers :), it vas realy helpfull, i will give a update on how things are going

[college man]

keep us posted.;)

[college man]

keep us posted.;)

[Mikhail]

[quote=”raimonds100″ post=32274][quote=”college man” post=32197]see if this helps you.:ohmy:

http://www.mazdabg.com/ftp-uploads/Mazda/323/engine-assembly.pdf%5B/quote%5D

thanks 🙂

You must take them to the shop if you want to switch them out. You’re putting oversize pistons on the rods right? You should , there would be no point in using same size pistons. Get some oversized pistons and rings and have the machinist bore our the block and you should have a good as new engine. just make sure its in specification, this is super important. Have the machinist measure the bore diameters to see if they are out of round or out of specification. If they are out of round or out of spec then oversized pistons are required.

Get a manual too, a Haynes or a Chilton.

thanks for you’re awnsers :), it vas realy helpfull, i will give a update on how things are going[/quote]

Thanks for asking. You seem a little uninformed in the whole rebuilding thing. You need to try and find as much information as you can. Asking people on a Mazda forum would be a good idea.

There’s nothing more important than preparing. If you are not prepared with the right foreknowledge, parts and tools, it will take you forever and you may mess up the whole job.

Here’s a site with good information on rebuilding engines:

[Mikhail]

[quote=”raimonds100″ post=32274][quote=”college man” post=32197]see if this helps you.:ohmy:

http://www.mazdabg.com/ftp-uploads/Mazda/323/engine-assembly.pdf%5B/quote%5D

thanks 🙂

You must take them to the shop if you want to switch them out. You’re putting oversize pistons on the rods right? You should , there would be no point in using same size pistons. Get some oversized pistons and rings and have the machinist bore our the block and you should have a good as new engine. just make sure its in specification, this is super important. Have the machinist measure the bore diameters to see if they are out of round or out of specification. If they are out of round or out of spec then oversized pistons are required.

Get a manual too, a Haynes or a Chilton.

thanks for you’re awnsers :), it vas realy helpfull, i will give a update on how things are going[/quote]

Thanks for asking. You seem a little uninformed in the whole rebuilding thing. You need to try and find as much information as you can. Asking people on a Mazda forum would be a good idea.

There’s nothing more important than preparing. If you are not prepared with the right foreknowledge, parts and tools, it will take you forever and you may mess up the whole job.

Here’s a site with good information on rebuilding engines:

[EricTheCarGuy]

My first question is why are you replacing the pistons? The second question would be how are you addressing the cylinders? If you’re really going to do this you should have the block bored out and honed and install larger pistons. To use new pistons in old cylinder bores is a step backwards in my eyes.

To answer your question have a machine ship switch out the pins and pistons, don’t attempt it on your own, get it wrong and you’ll scatter your engine. Bring in a professional with the right tools to help you with this one and a machine shop would be your best bet.

[EricTheCarGuy]

My first question is why are you replacing the pistons? The second question would be how are you addressing the cylinders? If you’re really going to do this you should have the block bored out and honed and install larger pistons. To use new pistons in old cylinder bores is a step backwards in my eyes.

To answer your question have a machine ship switch out the pins and pistons, don’t attempt it on your own, get it wrong and you’ll scatter your engine. Bring in a professional with the right tools to help you with this one and a machine shop would be your best bet.

[Author]

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