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How do i replace one of my piston rods? - 1985 Nissan Pickup

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It is not a simple job. You'll need to remove the motor to make things easier. Then you''ll need to remove the head and sump. Once you have done this you'll be able to unbolt the conrods from the crank and push the piston and conrod out through the top of the block

Posted on Oct 11, 2010


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Is there anyway that i can fix bent push rods ?

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You would have known if the rods jammed against the crank since that would have stopped the crank from turning.

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The old rod can be re-used if it is not bent and providing that the big end (crank end) is still round. Again, the rod needs to be assembled by a machine shop as the wrist-pin is a press-in part.
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You should not need an engine piston on such a new vehicle.
Do you mean a brake piston or something?

If you threw a timing belt, you don't have to replace pistons, just the valves.

If a piston really were bad, you need to take the head off, drop the oil pan, mark and remove the rod cap, and then push the piston and rod out the top.
If the car was not so new, you would also have to **** the ridge off at the top of the cylinder. But probably unnecessary after only 4 years.

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If the timing was off, from my experiance, it would cause the valve to go down threw the piston. The rod more than likely was on its last leg before the repair. Because the timing actually keeps the crank shaft (that turns the rods/pistons up and down) and the cam shaft (makes the valves go up and down) in sequence. So if the timing were off then the valves would be down when the piston were up. This could cause the rod to break but usually it either cause the valve to punch a whole threw the piston or the piston to bend the valve. Either case is very bad but so is a broken rod.

Hope this helps

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