Scion tC 1G Drivetrain & Power Engine and transmission discussions...

rod knock?

Old 09-09-2007, 09:27 PM
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Default rod knock?

ok so this isnt exactly about the tc, but w/e, it's still a general question. so my celica im told appears to have rod knock, im wondering, what exactly is 'rod knock'? how do i go about fixing it?
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Old 09-09-2007, 10:10 PM
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You are looking at $1,000 to $3,000 for parts and labor. Not worth fixing in an old car unless you are rebuilding the engine to play with it.
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Old 09-09-2007, 11:02 PM
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There are two distinct types of rod knock. The gudgeon pin end or wrist pin
or little end bearing (as you prefer) makes a light metallic clack. Often
you can hear the double clack as the con rod reverses the piston direction.

The main connecting rod bearing or big end makes a loud deeper toned knock
and is very bad news. Engines can run for a surprisingly long time with
little end knock. Big end knock is usually rapidly terminal.

Take it to a decent mechanic and get an estimate. Since you are in San Jose, I can recommend a couple. But as Menace mentioned, it will not be cheap.
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Old 09-09-2007, 11:05 PM
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usually you get rod knock when you bend a rod or eat up the bearings. depending on what year your celi is, it might be cheaper to buy a used motor.
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