toyota piston part numbers??? 13101-16131-03

[d1 mule]

hey all i have in my posession 6 X brand new 4agze pistons with pins and clips. The thing is i dont know if they are standard size or what C/R they are. can anyone tell by the pics and/or the part number, i have a feeling they are oversize 8:1 but dont want to guess as ill be selling 2 once i know

thanks

[Alex B]

Did you try google the part number??

13101-16131-03 PISTON SUB-ASSY, W/PIN 01.06.1991-01.05.1995 4AGZE..AE101;STD,MARK 3

Looks like they are standard size to me.

http://www.wheelsjamaicahost.com/wheels ... 873.0;wap2

[d1 mule]

lol didnt even think of that, cheers man. so they are 8.9:1 std sweet

[Mr Revhead]

yeah the 03 is the grade ie where it fits in the tolerances on the production line

[KinLoud]

As Warwick says, 03 a code for production line clearances, you would put an 03 piston into an 03 size bore.
The 3 next to the arrow is the size marking.

When they bore and hone the cylinder in the factory you get slight variances in the actual diameter as the tools wear...
A similar thing happens with the machining of the pistons.
To keep the clearances very close to ideal they measure and mark the block with the size. The piston is also marked.

1 is smallest
2 is the most common
3 is biggest

So a 2 size bore gets a 2 size piston etc.
You can physically put a 3 piston into a 1 size bore but it might not have enough clearance.

Look here at pages 47 - 49 to get an idea
NOTE - they are talking about 4age clearances NOT 4agze (which need more clearance)
http://home.onthenet.com.au/~paulp/Blacktop/bt4-em.pdf

4agze clearance is 0.12-0.14mm!!!

Ken

[d1 mule]

thanks ken thats very helpful!!