88runnasr5

Sorry to any mods who think this is a double post. had posted the same question in the 3.4 swap thread and gut shunned away to here because im assuming no one there knows an answer. so far i have herd the 95.5-96 is a bad year for the 3.4 for "common problems" unsure of what they are. and wabbit suggest the years to use are 96-99.

what about 00-01? i know the 02-04 are dbw but do they have better flowing heads? what about stronger internals?

ThatGuy1295

I dont believe in that sort of thing. And nobody knows the answere becuase there aint one. Just like there is no better year.

88runnasr5

is there no better year because no one has looked to find out? or no better year because for some reason toyota thought there motor was so good they where not going to change anything for the 8 and a half years the motor was made?

motocrossaddict223

a buddy of mine has an 04 taco and ive had that almost completely down to the bare block and its nearly the same as every other 3.4 ive worked on. The only difference i could tell would be the mileage of older ones causing what you've heard.

ThatGuy1295

You just answered your own question, if they would only improve it then its the best motor in the last year they made it. Duh!!

88runnasr5

so then why did wabbit say 97-99 was the better years? why not the 00-01? And you do relise i was being sarcastic right? if toyota stood behind there 3.4 and didnt make a single change why is there 2 or 3 different models of the rz series and i believe the same for the re series as well. heck if memory serves me they even fixed the early 3.0 problems in 94 with better head studs and gasket.

motocrossaddict223

I actually heard that 93+ 3vzes were worse... But i could be 100% wrong

88runnasr5

Might of been worse but they fixed the hg issue haha

motocrossaddict223

Hmm guess so, arent those the years that they have the recall for it though? Because i know mine isnt covered.

88runnasr5

not doubting you in anyway just wondering if you actually inspected the heads? and internals may look the same but they are totally different from forged and cast.

88runnasr5

not exactly sure but i want to say all 3.0s where covered and then they slowely stopped covering the earlier years. i know someone who had there 89 go in on recall

motocrossaddict223

Nope i haven't, we had a machine shop machine them and i just put things together basically hahaha. I cant comment on the actual heads, i know the motors go together the same etc

motocrossaddict223

hmm well my dealer told me i wasnt...oh well if my hg goes the 3.0 will not be going back in so im not worried.

88runnasr5

yeah the dealer is your problem you have to call toyota directly up big hassle read it in here a few years ago i think. but agreed when the 3.0 goes its time for a 3.4 that is why i am trying to build a 3.4 up the right way instead of buying lce performance long block.

motocrossaddict223

Yea if only I could afford a swap! I know the 3.4 almost as well as my 3.0 so it'll be easy when I get there

ThatGuy1295

sooo?

cman1

iTrader: (1)

1985 22re sfa !

westjohns yota

yup, hit that right on the head ^ everybody has there own opinion on whats better and whats worse, you cant awnser an opinion, all 3.4s are the same, pretty much all 3.0s suck and 22r... well i cant even awnser that, 22r's are just in there own catergory

88runnasr5

okay well i guess everyone on yotatech is on some good drugs or something, this is why i stay off this forum but for some reason i assumed since there is a whole 3.4 swap forum that someone would know any differences in designs, guess not. and for the record im not looking for the best year truck. looking for the best year 3.4 but guess people are to ignorant to read the question.

paddlenbike

iTrader: (1)

wow, 18 replies and you still don't have an answer. 95.5-96 had some issues with external headgasket leaks and their electronics aren't very supercharger friendly. 97-00 are generally about the same, varying really only in whether or not it has an O2 sensor (federal models) or an AFR sensor (CA models). 01-02 are where the changes came...they seem to have a very slightly larger fuel system that somehow copes with supercharging a little better than other years, all models use the AFR sensor, the exhaust manifolds are a better design and the ECU is more complicated because these have skid control (vsc) and electronic throttles. Otherwise, a 5VZ is basically a 5VZ.

EDIT--BTW, that info is for the 4Runner. The 5VZ ran through 04 in the Tacoma and I'm not as familiar with its specifics. I know some Tacomas have EGR while 4Runners either never have it or rarely do. It's nice to not have it for supercharging reasons.