btw didnt touch the main bearings.. crank did not come out

 

does the sound ever go away? just for diag, dump in 2qts. of lucas in there and see if it goes away.. It's really hard to diag. over the computer. If the big end is out of round or excessive clearance it will cause a knock, but the motor shouldn't vibrate like crazy... unless there is serious timing being pulled and the motor is running rough. do you have acess to an OBD-2 SCANNER? any MIL light coming.. did the motor ever come out of the vehicle?

 

btw... a first order vibration is indunced by the rotating assembly. a second order one would be a result of a first order. like something else emitting noise from the rotating assembly, and a 3rd order would be drivetrain.. (torque converter, tranny, etc)

 

i havent brought it past 3000.. but the sound just gets worse the higher i go.. more constant also

car was running fine before i did this.

Only code I have is 0031 aka oxygen sensor

engine has never been removed, tranny has never been removed


im going to get an estimate for a blueprint and balance tomorrow

 

it just feels VERY rough .. easiest way to put it

 

I'm a noob to building, so I'm only guessing from just common sense approach. Sounds like balancing is needed.

 

word you should ALWAYS balance a rotating assembly together like that, if the weights are off just enough you will get a vibration, plus (like what was discussed in another thread) you should also get the main caps (journals) align honed and get the block decked... just my .02...

 

Dude, take it from someone who has been down this road. Find a good shop and have them look at it. It'll be worth the $100+/- for them to tell you what is wrong. Then go from there. Don't just assume it needs to be balanced.

BTW, how the hell did you do that without removing the engine?lol

 

ok i have a stock tC and when i turn on the car it goes up to 2000 rpm....is that normal??
just wondering

 

Yes and it should level out at about 600-800rpm at idle as it warms up.

 

I plan on going to toyota and seeing if they can check it out for me

Wasnt too bad actually.. never touched the tranny.. cowl untouched

 

I bet $100 it's the balance shaft wrongly installed.

 

I think I will be sending you $100

The balance shaft makes perfect sense in this application. Plus is would be easier to fix.. so I am praying for it

 

Would not suggest taking it to dealership. A dealership doesnt know anything about a built motor. I would stop while you are ahead and pull the motor before you cause more damage. Take it to a shop that knows the scion motor and has built one before. The rotating assembly should be balanced. Did you check any of the clearances when you put it together or did you just throw the rods and pistons in?It almost sounds like your problem may be the balance shaft alignment though. Either way the assembly should be balanced. Atleast pull the motor and take it to a machine shop to balance everything.

 

the dealer will be checking my timing, balance shafts, and balance shaft timing.. things that are not related to the rods + pistons

Have an appointment tuesday morning

 

Your problem is not related to crankshaft balance. The problem is elsewhere!
The balance shafts don't have any chain on them : they move thru pinions not chain. There is a big chance they are installed wrong. If you eliminate the shafts they don't add significant vibrations but if you install them wrong it sure can create more.
I have removed the balance shafts on 2AZ-FE engine without balancing the assembly with no problem and the car is reving a little higher than factory to 6,550rpm's.[/quote]

Make sure you don't have clearance issues on the bearings and that the sound is not rod knock because if it is you might be killing the engine very, very fast!
Check that you have oil pressure at idle and that it raises along with the the engine reving up (if you don't then stop the engine ASAP).

Pito

 

x2
Specially on how the HELL did you do that without removing the engine?

Pito

 

going to the dealer tuesday morning.. we'll see what happens

PM'd u Pito!

 

installed oil pressure gauge

around 20psi at idle.. goes up as I give it gas
went up to around 40 at 2k

 

If the balance shafts are timed wrong, it will create this vibration issue as well but you should still balance your rotating assembly, IMHO. Hopefully it is just the balance shaft timing...