OMG My Engine is Toast

[Z3R0]

Wow....I thaught it was my time timing chain, well I kinda was right.

Cam gear pin was completely shreded, So how does a Cam gear completely move while driving full throttle??? Anyone!

Valves left valve imprint marks on all pistons, and 1 valve completely went threw one piston, and it is still stuck in the piston. WTF...
Yeah those were Arias Forged performance Pistons...950 a set.

Cylinder Walls are completely scored, well boys after a Dyno tune, and acurately tuning the RSM set up with a steady 13 psi of boost. Though some may imply other wise. My engine (excluding the MAF=trans problem) was properly tuned and all acomidating performance parts were in place to produce an awsome engine. unless someone can suggest improper instalation..I dont think these 3400 engines are capable of producing a reliable 350 Hp on a daily driven car.

GUYS!!! I found the problem

[Superdave]

This would be the 2nd boosted '660 now with a sheared cam pin..

In for carnage pics!

[john_V63400]

Hard to believe you kept running it at boost w/o a MAF... The MAF just doesn't mess with the tranny settings, it also affects fueling, ESPECIALLY under boost. A 1-bar MAP sensor is NOT letting the PCM know what is going on in the engine, therefore your fueling will not be right, no matter how well you think it is tuned.

Fuelling was fine, i made many..many passes on the dyno to get is good as it gets with out no MAF. It sucks, i was just about to throw in the MAF.
My engine gave and shut off(blew) durring a 2-3 shift at a resoonable 5900 RPMs. I dynoed 352 lb. of torque. I didnt realize I hadnt increased my available torque via Hptuners to my 2-3 shift. Then I made some adjustments, here and there, from some tuning guides I had aquired. My car was running strong, fast, and very strong. i was very..very impressed with the tuning I had done.
Well i took it for another quick full throttle run on the home stretch road to my house, it never made it to 3rd gear, it broke right while it was shifting. I have reason to believe....i simply was putting too much power for it. And maybe my mechanic overlooked something. But he assured me he tightend the cam gear bolt correctly, maybe my timing chain skipped enough to offset timing so bad it collapsed the valves st8 into the pistons and torque the cam gear out of place. any other suggestions

[geldartb]

i got just one suggestion Dont let other people work on your car especially your engine.

[SappySE107]

Yeah...too much power from the RSM SC kit with a 1 bar setup and no maf. I am going to repeat this again. 1 bar map doesn't read boost. You cannot tune it, period. 1 psi boost to 13 psi boost is all the same to a 1 bar map. Whatever you were doing is not what I call tuning. I call it wasting time and trying to blow your shit up. Mission complete.

[john_V63400]

Since your boosted and running a boosted GA, lets see...Mine 352lbs of tq no MAF. Nuff said
these engines suck, ive experimented, and Im never going with a 3400 to make a beast again.
Time to boost my yaris, at least it has the dependablity of toyota behind it.

[rx191]

man shit happens live with it, things break all the time, you may have just had a faulty pin. the 3400 is a great motor and you seem to have put the right parts in it, to make it last.

oh and sappy your right you can't properly tune a boosted car without the computer knowing what boost is ta but thats not what broke this engine, so quite being a ass hole about it, your right but shouldn't rub it in the guys face. you seem to do that a lot around here.

[john_V63400]

I love the engine, wish this fatal flaw wouldnt of happened

[El_Diablo]

you do know a hard shift can put a lot of stress on an engine, correct?

every car manufacture makes shity engines, and even shittier cars... just look at that turd flavored jelly bean of yours... have fun trying to boost it, doubt you'll break 160 wheel hp with a turbo or s/c

[john_V63400]

[john_V63400]

the funny thing is that, when my engine died i didnt hear any loud noises, it just shut off. And i towed it to the mechanics. I remeber him telling me, he got it to start, now would an engine in that shape start????? maybe he broke it while it was there.

[john_V63400]

you do know a hard shift can put a lot of stress on an engine, correct?

every car manufacture makes shity engines, and even shittier cars... just look at that turd flavored jelly bean of yours... have fun trying to boost it, doubt you'll break 160 wheel hp with a turbo or s/c

hey my jelly bean will gO fast!!!!! Im going to be breaking 17s all day with my turbo. lol..... Dude seriously, Im just going to turbo it and make it at least a 14 sec car, you know how fast that would feel in that car. 180 HP would easily do thAT. Im not wanting to break 13s or 12s in it, I want to just have a nice import turboed car thats all, and I will.

[SappySE107]

oh and sappy your right you can't properly tune a boosted car without the computer knowing what boost is ta but thats not what broke this engine, so quite being a ass hole about it, your right but shouldn't rub it in the guys face. you seem to do that a lot around here.

Thanks for posting again.

[SappySE107]

Is it just me, or are the tops of the other pistons eaten up a bit as well?

[kflo 93 gt]

Since your boosted and running a boosted GA, lets see...Mine 352lbs of tq no MAF. Nuff said
these engines suck, ive experimented, and Im never going with a 3400 to make a beast again.
Time to boost my yaris, at least it has the dependablity of toyota behind it.

Dude, you highlighted the goddamn problem in your own fucking post. How much more ignorance can you display? I'm done with you forever, keep away we don't need you clogging up the forums with dumb posts anymore. Good riddens to one more IGNORANT tool.

No that's not just you Ben, looks like somewhat of a lean burn issue wouldn't you say?

edit: I'm sorry to be a dick, but this guy is insulting every one of us here. He made 2 dozen posts asking about redundant shit, which he listened to none of - obvious by his piston choice... I can think of 1 company for sure that I bet got recommended that would've costed half as much that I'm sure he never looked at. Plus the entire MAF issue, how many threads and posts was that? Sorry, but I have no sympathy for ignorance, none at all.