CruiserDan... question for 1FZ piston set.

[JerryLX450]

I’m concerned; my rig had about 200k miles in it.Im planning to keep it another 10 yrs.Im going to replace Piston, rings and rods. Now when I go to my local Toyota dealers they showed me 3 or 5 different pistons set. For example, the overbore one which is I don’t need it. So my question is what the right OEM pistons do I need CDan?

Thank you very much.

 

[Tools R Us]

Have you measured the pistons? Why are they bad, most of the time if the pistons are bad the bore also suffers and you need oversize pistons and a bore job.

Why replace the rods, did you lose a rod bearing?

 

[JerryLX450]

Its nothing wrong with the piston i have right now but since im going to keep the LX for another 10 yrs and replace the headgasket, I've decided to get new rings, pistons and rods at the same time also.

 

[cruiserdan]

The 1FZ is what's known as a "select fit" engine. When the engine was originally assembled the pistons and bearings were "selected" for optimum clearances. There are three "standard" piston diameters, five "standard" rod bearing thicknesses and 6 "standard" main bearing thicknesses.

In order to determine what you need the engine needs to be torn down and inspected. You find out what is in there and replace with the same numbers as were originally used (IN MOST CASES).