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Old June 23rd, 2012, 11:24 PM   #1
98ZJ318
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Default 4 runner 3.4L good or bad?

just recently added a 98 4runner to the fleet with the 3.4L are these engines reliable and worth having? or are they junk and run?
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Old June 23rd, 2012, 11:34 PM   #2
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they run well so long as the timing belt is maintained. i've done a few of them over the years.
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Old June 24th, 2012, 08:39 AM   #3
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Great motor...i have had two with 200k + and both ran like new.
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Old June 24th, 2012, 11:43 AM   #4
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thanks for the replies fellas. was worried since it was a twin cam and didnt know if it would be as reliable as a 4.0. Hows the ifs hold up to light wheeling?
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Old June 24th, 2012, 02:39 PM   #5
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Fine, myself and many others have beat them hard with 33-35" tires and they work great. You will break a cv now and then but its a easy, cheap fix.



My old tacoma on 34" tires...truck had been all over the east half the country wheeling, always driven, never trailered, best truck I ever owned...i wish I never sold it.
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Old June 24th, 2012, 03:14 PM   #6
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its got my interest but im still not totally sold on the idea of switching over from a jeep to a yota but i do like the looks of them with a small lift and decent size rubber. Ive seen your truck before, i bought some 32x11.50 from you at a gas station in battle creek i belive?
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Old June 24th, 2012, 05:57 PM   #7
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You will start wheeling the yoda and never look back. The 3.4 is a very reliable motor. I have been beating on mine for 130,000 with a supercharger and never had any issues.
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Old June 24th, 2012, 08:28 PM   #8
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Originally Posted by Kodiak450r View Post
they run well so long as the timing belt is maintained. i've done a few of them over the years.
They are non-interference engines so even if you run it till the belt brakes, just replace and you are good to go. They are one of the most reliable engines toyota has made. I have a '98 with 230k, it is my DD/weekend wheeler. Also have a 2000 with almost 200k. My brother has a '96 that ran perfect with over 250k until he went tree hugging with it.

Check out t4r.org

Throw the keys to your heep in the trash.

Edit* sorry.. don't throw them away. Sell it to buy upgrades for the runner

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Old June 24th, 2012, 08:40 PM   #9
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They are non-interference engines so even if you run it till the belt brakes, just replace and you are good to go. They are one of the most reliable engines toyota has made. I have a '98 with 230k, it is my DD/weekend wheeler. Also have a 2000 with almost 200k. My brother has a '96 that ran perfect with over 250k until he went tree hugging with it.

Throw the keys to your heep in the trash.
Thanks for the input! the 98 we acquired has 206xxx and seems to run pretty well. I wasnt sure if it was one of the better engines toyota had made or was the step child antichrist. Been looking them up on the 4runner forum and some of them look nicely built
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Old June 24th, 2012, 08:50 PM   #10
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Thanks for the input! the 98 we acquired has 206xxx and seems to run pretty well. I wasnt sure if it was one of the better engines toyota had made or was the step child antichrist. Been looking them up on the 4runner forum and some of them look nicely built
It's just getting broken in. I would argue that is the best they've made but the 22r(e) is also a bullet proof engine. The 3rd gens are just plain sexy too. I get people asking me how old my rig is all the time and when I tell them it's 14 years old their jaws drop to the floor, then when I tell 'em it has over 230k a puddle forms by their feet. Most of the compliments come from die hard big 3 guys too.
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Old June 24th, 2012, 09:11 PM   #11
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i may be tempted to take ownership of this but it depends on if my jeeps sell??
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Old June 24th, 2012, 09:18 PM   #12
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Got pics? Would be awesome to have another yota semi-nearby to wheel with.
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Old June 24th, 2012, 09:30 PM   #13
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no pics yet. might throw some up but been on the fence on what i wanna do with my jeeps and the yota
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Old June 24th, 2012, 09:42 PM   #14
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Ok well just to help you decide..






All from a trip up north with my brothers 265s on. Normally sits on 285 KM2s

Don't mind my shameless picture whoring..
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Old June 24th, 2012, 10:19 PM   #15
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looks good! if i were to get it ide think a small 3" lift on 285's would be a nice set up for what ill be using it for.
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Old June 27th, 2012, 12:18 PM   #16
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I love my 97, 155k on it and still purring. Dropping it off at the body shop today to fix some rocker damage from recent trip to Uwharrie. It has been my daily driver/light duty wheeler for almost 4 years and never missed a beat. I've seen several for sale with 250k on them and 1 had 450k.
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Old June 28th, 2012, 06:29 AM   #17
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3.4 is extremely reliable. I had an 01 Tacoma with 192k that I sold 2 years ago that I beat the snot out of. Motor and trans still ran like the day I drove it off the lot. The bonus would be if it has the electronic rear locker. Do the grey wire mod and be able to wheel it with the locker in 2h, 4h and 4l.
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Old June 28th, 2012, 12:11 PM   #18
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I haven't done the grey wire mod to mine yet. I've heard about it, just need to do some research.
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Old June 28th, 2012, 07:03 PM   #19
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I haven't done the grey wire mod to mine yet. I've heard about it, just need to do some research.
It's really simple. I built my own sub-harness when I swapped my elocker axle from my 2000 into my '98 so I have no safeties, which is good ..and bad
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Old June 29th, 2012, 01:06 AM   #20
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and what is this gray wire mod you fellas speak of? would my 98 have it? drove it to the store, doesnt ride bad at all
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