Can you do a bottom end rebuild from the bottom end? no head removal...

[alright2020]

Is it possible to replace the piston rings, rods and main bearings from the bottom end with only pulling the oil pan?

i ask because i had an oil line pop off over the weekend and didnt realize it immediatly and i think i may have slightly starved the motor of oil.... i am pulling it on friday to find and fix the oil leaks completely. but i wanna say i hear teh slightest start of a rod beginnning to knock. id rather not do all teh work pullign it out and all and putting it back in to start knockin. i havent driven it since and since bearings and rings are relatively cheap i figured if i can replace them i will

should i jsut replace with oem sized rings? the motor has ~30k miles.... or will i need to do it the proper way and pull all the rods out and mic them out?

[bartZ32tt]

Is it possible to replace the piston rings, rods and main bearings from the bottom end with only pulling the oil pan?

i ask because i had an oil line pop off over the weekend and didnt realize it immediatly and i think i may have slightly starved the motor of oil.... i am pulling it on friday to find and fix the oil leaks completely. but i wanna say i hear teh slightest start of a rod beginnning to knock. id rather not do all teh work pullign it out and all and putting it back in to start knockin. i havent driven it since and since bearings and rings are relatively cheap i figured if i can replace them i will

should i jsut replace with oem sized rings? the motor has ~30k miles.... or will i need to do it the proper way and pull all the rods out and mic them out?

Nope. If the heads are still on, how will you pull the piston out once the rod cap is off? Or the crankshaft?

Sorry to hear about your troubles though, really sucks man.

[alright2020]

well i would obviously remove the crank and pull them out of the bottom, couldnt i pull the crank slide them out the bottom, measure it all out then order the right parts and reassemble?

[bartZ32tt]

well i would obviously remove the crank and pull them out of the bottom, couldnt i pull the crank slide them out the bottom, measure it all out then order the right parts and reassemble?

Someone correct me if I'm wrong, but in order to get the main caps off to pull the crank out, the heads need to be pulled. It's just not possible with heads on.

[vape-one]

My old Z blew because of a Main bearing an a hell of a knock... You can take pistons out from below.. An main.. here is some picts kinda to prove what I had went through..

[bartZ32tt]

I'll be..I stand corrected.

[alright2020]

well i knwo you can pull them out form the bottom. and i know my na blew because of a spun rod bearing... it was a big knock. but im not even sure if i have aknock yet... i havent had time to look at it... and i know you can slide em out the bottom all day but can you properly put them back in wiht new rings? i dont think you could.... idk something about getting a ring compressor and all goin up seems like it may be difficult..

[evildky]

no you can not take the pistosn otu the bottome!

the casting areas aroudn the main bearings is in the way, and even if you could get it out you'll neve get a ring compressor in there for reassymbly, don't be lazy, pull the heads it's not that much work when yoiu considder the scope of what you are doing

[alright2020]

nevermind then. And its got nothings to do with being lazy...its a price thing. Considering i cant really put a motor back together with used gaskets.....

[wild_maxx]

This guy serious? Have you ever built an engine?

[alright2020]

yeah ive built an engine.... and ive done it from the top how it needs to be done. but i was askign if it could actaully be done. i dont really apreciate the chime in and make fun of me kinda deal especially when im jstu tryin to ask a question. theres alot of ppl out there that have expiermented and tried stuff different ways. its somethign that may have actaulyl been done. and i was curious. so thanks for the no help that you gave me. a simple no it cant be done or not even a reply would ahve done jsut fine.

[Ghut300zx]

no you can not take the pistosn otu the bottome!

the casting areas aroudn the main bearings is in the way

sounds like a no. I understand what your thinking though

[vape-one]

I am wrong ,,, Evil is right ... I remember the Oil squirters are in the way an yes the casting is not cut for pistons to slide all the way down.. But if ya have a blown piston im sure itl come out in pieces as my #6 piston did.. lol... Anyhow sorry for giving you the wrong information fellas... My blond hair was kicking in duh...

[tmeyer29]

This guy serious? Have you ever built an engine?

its just a question