putting in new piston rings

[johnvin]

im not sure what would be the easiest way of putting in new rings , can i just take off the head and get to them that way or do i have to pull off the oil pan and drop the crank ? need help asap. i have the 7mge non turbo

[Travis89Turbo]

Originally Posted by johnvin

im not sure what would be the easiest way of putting in new rings , can i just take off the head and get to them that way or do i have to pull off the oil pan and drop the crank ? need help asap. i have the 7mge non turbo

you have to pull the head first... then drop oil pan and then go for the rod caps, lastly pull the crank and push pistons out the bottom..

To install u need to buy a ring compressor (napa for 10 bucks) and oil up the cylinder walls and tap in pistons one at a time. Make sure u install them with the arrow on the piston facing forward. Don't mix up the rods. Keep them with the same cylinder same direction and same caps... I would highly recommend new rod bolts. Use assembly lube on crank and rod bearing journals. Torque to spec and reinstall everything! I suggest u also get atleast a hone job done or even bored if ur engine has a lot of miles.

[johnvin]

ok thanks ! im not too filliler with car motors but i help work on them so i know somethings.
can i just drop the oil pan and then the crank and take it out that way? and put it back in that way ?

[Travis89Turbo]

No you cannot. You have to remove pistons from the bottom and install in the top. You tube it there are plenty of videos on how to install pistons.

here is an e-how link. Obviously not the same engine but pistons install the same.
http://www.ehow.com/how_2142604_inst...on-engine.html

[Sonyps307]

I think u would be better off just pulling the motor

[Travis89Turbo]

Defiantly pull the motor. You cant get flywheel off and all kinds of problems u would run into. I was assuming you were planning on pulling the motor cuz u never stated u were gonna try to do it in ur car!

[87hilux7mge]

problem here. as far as i tried and seen, you cannot get pistons in or out of the bottom of the 7m block.

the main girdles get in the way. also you do not have to pull the crank to put new piston rings in.

pull the motor. pull the head and oil pan. remove oil pump. remove rod caps. take vacuum plugs and cover rod cap bolts. push pistons out the top of the block. remove old rings. clean rods/piston. hone/deglaze cylinders with a honing brush. install new rings, careful not to break them. make sure everything is very clean before reassembly. using a ring compressor and wooden handle or rubber coated handle (NO METAL), tap pistons back into block, be very careful not to ding anything. seat rods back onto journals. install caps and check clearances. if it all check out, torque to spec. reinstall everything and your good to go.

i wouldnt recommend just doing rings cuz theres prolly other things wrong if its old. a full rebuild would be best. just check your bearing clearances and youll be fine.

one more thing, the old addage that removing pistons from the top is bad due to ring wear ridge, is almost unapplicable to most toyota l4 and l6 motors. toyota uses high nickel content blocks, adding greatly to wear resistance from the rings. this is not bullet proof, but when tearing a motor down, it takes 2 seconds to check. ive never had a problem with any rings or pistons breaking when removing them from a block.

ive pulled apart 3 M series block and 2 R series, and all of them had well over 180k. the ring ridge was almost non existant. the most pronounced was my 22r from my pickup which had 240k on it (still ran great, just replaced the rings while i was doing the clutch for some extra insurance. guy i sold it too still runs it to this day and gets 25+ mpg and has 145-150 compression all across the board.

[johnvin]

thanks guys ! yes i have the motor out right now . and im picking up the other motor that i just had bought with less miles and way way less problums also.

the motor that i bought i only payed 300 for it and it has the following done to it .

Hot tanked
Bead blasted
5 angle competition valve job
Resurfaced
Polished ports
Polished cam shafts and housing bore caps.

[johnvin]

this is the motor that i just got

[johnvin]

just got the motor for it