Rods - FMVperformance.com : The site for all your Ford Mazda and Volvo needs
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post #1 of 5 (permalink) Old 08-12-2018, 08:22 AM Thread Starter
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Rods

Hello, I have a 2004 Mazda 3 2.3L. It has developed a sever knock ( It is believed to be a rod bearing issue) I am looking for advice or instruction on how to replace the rod bearing.
I am very mechanically inclined but have never done this before
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post #2 of 5 (permalink) Old 08-12-2018, 10:20 AM
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Originally Posted by Stilg04 View Post
Hello, I have a 2004 Mazda 3 2.3L. It has developed a sever knock ( It is believed to be a rod bearing issue) I am looking for advice or instruction on how to replace the rod bearing.
I am very mechanically inclined but have never done this before
Unfortunately simply replacing the rod bearing won't help. More than likely the crank and probably the rod itself has been damaged; replacing the bearing will get you maybe 100 miles before it'll go again.

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post #3 of 5 (permalink) Old 08-12-2018, 11:08 AM
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I looked into rebuilding my daughter's engine after it blew a head gasket. The cost was pretty high, and the unknown costs of machining the block and/or head drove our decision to just replace the engine with a later model 2.5L Duratec from a Ford Fusion. It turned out to be an excellent choice, and I'll do the same in a heartbeat for my son's Mazda if it encounters any problems.

Lots of great advice on these forums for performing the 2.5L engine swap.
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post #4 of 5 (permalink) Old 08-12-2018, 11:21 AM
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Originally Posted by Datsun1600 View Post
I looked into rebuilding my daughter's engine after it blew a head gasket. The cost was pretty high, and the unknown costs of machining the block and/or head drove our decision to just replace the engine with a later model 2.5L Duratec from a Ford Fusion. It turned out to be an excellent choice, and I'll do the same in a heartbeat for my son's Mazda if it encounters any problems.

Lots of great advice on these forums for performing the 2.5L engine swap.
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2006 Mazda 3 2.3L Hatchback 5-speed Automatic
I never purchase Harbor Freight tools.
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post #5 of 5 (permalink) Old 08-12-2018, 11:35 AM
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You can replace a single or all the engine bearing only if...........when you look at the journal(s) and they are measured for a proper sized bearing. There are no severe scores on the journals (s). If possible but in this case not necessarily required you can measure the thrust? If it is only a bearing you can successfully replace them and go many thousands or 10's of thousands of more trouble free miles. There is a little more information about doing this procedure for best result. Should you come to that point chime in again or pm the members you think can help you best.

I would say however that be sure it is in fact a bearing and not something else. A 28 dollar investment to have your oil checked. The type of materiel that makes a bearing will be apparent in the test of the oil.i.e. copper,steel,aluminum etc. This test analysis will confirm a bad bearing.

https://www.blackstone-labs.com/
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