Okay two quick questions - if i run an 89mm bore would the 89mm head gasket be ok? Going with a lower comp piston the piston at tdc will be below the head gasket anyways so i would think if theyre the same diameter itd be ok. Second i believe the headgasket for the 06-07 is diff correct? Does dezod have both avail or just the 05-06 style? Finaly - to remove the balance shafts which oil passages need to be jb welded - does someone have a pic showing locations?? Thanks guys!!

 

So we can scratch the balance shaft removal question - found the picture with the oil galley that needs to be plugged Headgasket question still stands - thanks in advance guys

 

i tapped and put a bolt in mine and lightly brushed the thread with jbweld. Not saying the jbweld would ever fall out but the slight chance it would you have a serious issue.

 

What do the balance shafts actually do? And does removing them cause any possible harm?

 

they cancel out vibrations in the crank/engine. the question of any possible harm is one debated each way similar to crank pulleys. I have had mine removed for almost 30k miles, while being boosted. no problems.

 

so no balance shaft will have more vibrations?

 

Turbo Boosted without Balance Shafts FTMFW!!!!!..... Especially for longevity... balance shaft bushings will spin and kill your motor!

 

Thats has got to be one of the dumbest things I've seen on SL for a while. In terms of longevity it's the complete opposite. How can putting more vibration into your crank shaft make your engine's life longer? Vibrations are just more undesired stresses put on the engine.

As far as benefits, it's debatable. I removed them from my first engine build I did for my tC and honestly didn't notice any added benefit. I did notice that after removing them and putting in poly mounts my tC was quite possibly the worst car to cruise on the highway with above 75mph.

I'm currently building my second engine with some new toys but will most certainly leave the balance shafts in place.

BTW, they do not have bushings, they have the same style journal bearings as your main and rod bearings. They shouldn't go out any faster than those do. If youre spinning bearings and killing your motor, then you need to remeber to change your oil.

 

Alright soo - good news Wont be boring it out - cylinder walls are pefect - a good hone and ill be in good shape Turns out low compression in cyl 1 was a cracked ring landing - whoda thunk it? lol - sothe best part of all this is i had to find this out by pulling the crank and than the piston to the bottom - wont come out completely ut came out enough that i can see parts of a ring landing gone As for my loss of oil pressure - quite possibly a faulty oil pump - when i pulled gthe balance shafts - the secondary balance shaft - the one with the plastic gear - well the plastic gear is no more - it was basically obliterated i think that was my real problem Im thinking maye lack of lubrication due to failed oil pump? As for the rods they look to be in good shape altho without any precise measurements theres no way to know for sure - so second question - who knows where i can get that stupid 10 mm bihex inner drive key for the head bolts - I REALLY NEED ONE NOWWWW!!!

 

Wrong, the balance shafts are an accessory persay driven off of the crank shaft... Purely for comfort. The engine is balanced without it.

Benefits are... you won't spin your bearings and destroy your motor (meant to say bearings not bushings... be easy now man!)



Yes the ride quality does degrade... such is the sacrifice made for reliable performance.


Good luck... you'll need it.

Every 3 or 3.5k


I really hate to see people not learn from other's mistakes (ie: leaving in the balance shafts and destroying your hard work!)

 

RSRacer, you have an 2005, you should really upgrade your oil pump.

I did mine when I did the balance shaft delete. The 2005 pumps were prone to failure in high horsepower applications. Supposedly wheel hop helped contribute to some of those failures as well.

 

OK so the tool for the head bolt - im starting to think this is what's referred to as a 10mm triple square drive - this is considered the 10mm "male" 12 point - this is what the bolts are correct - 12 points of contact? I tried a T-55 which seems to fit perfectly but began to slip a bit when applying some force to remove - so i decided to look for a better tool and not damage bolts This would make since if our olts actually are triple square as the torx bit has 6 points of contact so the t-55 prob just happened to line up with 6 of the 12 in the bolt - itd just be nice to know if what im thinking here is correct - i know i can order a 10mm triple square 1/2" drive socket from several local places

 

heres the tool im thinking it might be - let me know if this looks right - http://www.sears.com/shc/s/p_10153_1...2616000P?mv=rr

 

OMG kid! F'ing think about it!!!!!!

If vibration are so much more noticable then how the heck can the engine be balanced????

If it's close to being balanced, then it's not balanced....
They don't call it a BALANCE shaft for nothing.

I copied this from a site, read it. You obviously are new to anything that has to do with engines....

"Balance shafts are most common in inline four cylinder engines which, due to the asymmetry of their design, have an inherent second order vibration (vibrating at twice the engine RPM) which cannot be eliminated no matter how well the internal components are balanced. Flat engines have their pistons horizontally opposed, so they are naturally balanced and do not incur the extra complexity, cost or power loss associated with balance shafts. This vibration is generated because the movement of the connecting rods in an inline engine is not symmetrical throughout the crankshaft rotation; thus during a given period of crankshaft rotation, the descending and ascending pistons are not always completely opposed in their acceleration, giving rise to a net vertical inertial force twice in each revolution whose intensity increases quadratically with RPM, no matter how closely the components are matched for weight"

 

Your maturity level is quite questionable. Kid? Loser? Do some more research!

The 2AZ-FE is balanced externally via the crank pulley believe it or not. The balance shafts arent for balancing the motor they are merely to cancel out the feel of the vibrations in the passanger cabin. PERIOD. In some performance cars like EVO's it is a common practice to remove the balance shafts to prevent them from destroying the engine in high horsepower applications.

Here's a couple links so you can be informed by others better versed than I on this topic.

http://www.yoursciontc.com/forums/in...pic=26036&st=0

http://www.dsmtalk.com/forums/showth...t=67963&page=8

 

I have and continue to operate more complex equipment than you ever will. I'll give you a hint... my turbines generates more power than a top fuel dragster with the total system having a complexity of a small city.

You truly never know who is on the other end of the keyboard... "Kid!"

 

Alll i know is balance shafts WILL NOT be going back into my motor after seeing what they looked like upon removal - the secondary shaft gear (the plastic gear) was SHREDDED, scary looking shredded lol - i really need to take a pic of this - but anyways they will most definately not be going back in

 

Definitely try to post up a pic of them! I'm curious to see.

 

yEA PICTURES!

and you two relax or this is going to be locked.

 

::Relaxing::
But..

It goes without saying.... Even though if those are electrical power output turbines the other guy on the end of the key board is one of the mechanical engineers that might have put it in place......kid. Although why are you bragging about either coal, gas or steam turbine generators on a car forum.