just replaced engine in 98 rolla and..

[Fergifruitchew]

...well everything works fine, but it blows alot of blue.... i hate the 1zzfe engines now.... what else can i put in this car? please give me ideas!!!!

[PhatRoyale]

Sounds like you're burning oil. I would look into getting new pistons and rings.

[MacktasticSlick]

Is oil burning a problem that starts at a certain time in the engine's life? I know that it a common problem with these cars, but not all. Today I just passed 67000 miles on my 99 CE. I was wondering if oil burning is in my future.

[huangxin]

Originally Posted by Fergifruitchew

...well everything works fine, but it blows alot of blue.... i hate the 1zzfe engines now.... what else can i put in this car? please give me ideas!!!!

8th gen corolla engines are known to burn oil (only a few that doesn't). does it smoke all the time? during hard accelerations? or just on start up?

only on start up you can try to replace the valve seals (not that common in 8th gen 1zz's, pistons and rings are often the cause), but if it smokes all the time, most likely pistons and rings are done.

to replace those you might as well replace the ones in your old engine, and return the one you just put in to save you some money.

[MacktasticSlick]

Same post time FTW!

[Fergifruitchew]

the thing is, if i return the one i just put in, i get credit back at the store, i cant get my money back, either i have to get another 1zzfe and hope it doesnt burn oil, or i find another one that will fit.... i also have a 92 pickup i need an engine for... i might get rid of this car and get something else.... or i can take the engine apart, bore the holes bigger and get bigger pistons and rings that match!.... now why did toyota put smaller pistons in the engines and bigger rings to compensate? are they nuts?

[huangxin]

they did it at first to save money and the oil burning doesn't not occur till way past 100k so they don't have to cover it under warranty.

few options here, you can return your current engine for a store credit and get an engine for your pickup then rebuild your old 1zz

or you can try your luck with a 1zz from 9th gen corolla. seems like toyota fixed the oil problem secretly, because i haven't seen or heard any 9th gen corollas having oil problems even when they are way over 100k.

[fishexpo101]

I'm pretty sure the 1ZZ-FE used reduced tension on the piston rings and a shorter skirt design compared to the previous generation of engines. All for reducing friction, internally, on this generation of engine. I doubt they did it as a cost cutting method, all the tech they pumped into the engine cost more than the previous generation. Consistent cylinder bore circularity and trueness, was a key design aspect in the 1ZZ-FE development - better cooling, reduced pressure below the piston, the previously mentioned overall reduction of friction helps pump more power from a lighter, smaller, engine packge.

They also followed a similar recipe on the 2009 Rav4 2.5L engines, to replace the previous 2.4L engines. Be interesting to see if they too follow a similar fate as some of the 8th gen Corollas.

[Fergifruitchew]

i think i know what to do, im going to bring my block to a machine shop, they will bore the holes .25 or more over and get matched pistons and rings, for it all.... everything under 1000,then i have a celica!! lmao

[Fergifruitchew]

thinking about the engine bore... would i have to change my computer with a chip or something? because with bigger pistons and a larger area, id be sucking in more air with the original amount of fuel it had.... it would maybe run too lean...

[huangxin]

Originally Posted by hummerh2o

around 30,000 miles when everything wears in.

mine didn't start till around 120k or so

and to the OP, i didn't realize that your car is a 98. your short block is same as the 1zz in 9th gen, but you don't have VVTi. so if you want to swap in a newer 1zz, you need to get the ECM and harness from a 8 1/2 gen, or just swap over the short block.

i know you are choosing to rebuild the engine, but i just wanted to make this clear just in case somebody else uses this for reference in the future.

[fishexpo101]

Originally Posted by Fergifruitchew

thinking about the engine bore... would i have to change my computer with a chip or something? because with bigger pistons and a larger area, id be sucking in more air with the original amount of fuel it had.... it would maybe run too lean...

Yup, boring it out that much over will totally confuse the original ECM. Your options then are to run a piggyback computer or go with a full standalone ESM system. Also remember - not just simply boring out hte engine and your done with it, to make used of the new displacement - might be a good idea in reworking the valvetrain (port and polish, larger valves, heavier springs, new valve seats, new cams, etc.), induction system (bigger throttle body), the required exhaust mods, fuel supply (bigger injectors, fuel pump, differen regulator, etc.)

Easier to just try another engine - though that can be hit or miss. Some people fellow on another forum went through 3 engines before he got one that worked well (he was looking at both the 8th gen and 9th gen Corolla engines for sources).

[Fergifruitchew]

the first gen of the 1zzfe engine (1998) right.... anyway, is the 98 and the 99 the same? or did they change the piston size in the 99 and add vvti? what im saying, i do have the 1st gen of the 1zzfe without vvti, if i dont have smaller pistons with larger rings to compensate like what i heard the 1999+ have, why would all my engines burn oil like the 99+? Now if my engine has the same small pistons(undersized) could i just put larger pistons in and be done with it all?
the bore is 79mm and stroke is 91.5mm
edit: I just found out why theres oil in my intake, that valve pcv valve i think? that goes from the valve cover to the intake via a hose has malfunctioned and its letting oil pass through.... therefore burning oil burning blue. could it be this simple or no?