Topic: Piston and bearings ID

[David]

I have a couple of questions guys.
83' yota pu with 22R.
Could you enlighten me on the numbering system on the stock pistons. Mine have the following stamped on top: 1  3 /  2   4 /  1   3 / 1   4 ,
Also I can find no size marked on the main bearings or rod bearings, does this mean they are standard?  I can find no info in my Haynes on either question.
Thank you

[David [OP]]

Hmmmm, no one? Guess my breath stinks.

[2manytoys]

Best bet would be to mic the crank and the bores to be sure. Sorry I can't help with the numbers.

[yotaneck13]

pict up some plastiguage from the local parts store put it in tork bering cap on take back off measure with the provided chat will give you excact spcs for what beings ae in it

[OOPS]

pict up some plastiguage from the local parts store put it in tork bering cap on take back off measure with the provided chat will give you excact spcs for what beings ae in it

How is that going to tell you if the crank has been turned and undersize bearings are being used? When you turn a crank, the tolerances for the bearings are supposed to be set the same as stock.

[yotaneck13]

How is that going to tell you if the crank has been turned and undersize bearings are being used? When you turn a crank, the tolerances for the bearings are supposed to be set the same as stock.

how is it not the plasti guage expandes to a cirtin measurement for what size berings are in a truck thats how ive always figured out what bering to buy for a TRUCK I DONT SEE HOW YOU COULD POSSIBLY think that

[David [OP]]

Bore mic's out to standard , what I don't understand is the marking on top of the pistons and the lack of any markings on the bearings. I'll plast-gauge the rods and mic the crank today.
Most engines I've rebuilt have had bearings marked 'std', '.020', etc. and the same for the pistons. Toyota has a series of two numbers 90 degrees apart on each piston top and they don't seem to make much sense, well to me anyway. They don't even seem to indicate which piston is one, two, etc.
Piston #1    1  3
"   "    #2    2  4
"   "    #3    1  3
"   "    #4    1  4   
Thank you for the replies and advice.

[79coyotefrg]

your pistons are stock. std sized.

also your bearings.

[OOPS]

how is it not the plasti guage expandes to a cirtin measurement for what size berings are in a truck thats how ive always figured out what bering to buy for a TRUCK I DONT SEE HOW YOU COULD POSSIBLY think that

That is different then I have always used it. The only thing I have ever used it for was the make sure the clearence between the crank and the bearing was the right tolarence according to the instructions that came with the bearings or the FSM. You just taught me a new use for it that I did not know and I have been building engines for over fifty years. The way I have always found if the bearings were oversized was to look on the back.

[yotaneck13]

sorry didnt mean to use caplocks there but yea it expands the same way it would for your way but lets you know if the berings are stock or not by consulting the fsm or chilton index with the specs given fron the reading

[yotaneck13]

and im only 20 lol so i dont know everything and am always willing to learn something new