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95 GSX Balancer Shaft, NEED HELP

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AFG-DSM2g

10+ Year Contributor
93
0
Apr 3, 2011
Renton, Washington
(Nevermind, i got it done on my own. Thanks anyway!)

Okay, i feel pretty embarrassed posting this, but i really need some pro help from some of you DSM geniouses. I have a 95 Eclipse GSX A/T. I did my timing belt change about 1k miles ago and ever since there has been a vibrating noise coming from the driver side of the car everytime i hit 3k rpm and up. I was told at one of the mitsu meets by a few guys that it was my balancer shaft that was off phase. So now i finally raised it up and checked out my marks and they look fine. Honestly, i dont even know where the balancer shaft is and how am i suppose to phase it correctly. There are a few sprockets that dont even have markings on them. I really need some help. I'm 16, and i really dont have much money, but i'm fine with paying for your gas to come to my house real quick. I dont want to tow it to a shop since Im sure its like a 20 minute job, but i really would like a pro's help and second opinion.
Im Located in Renton, WA.
I have ALL the tools neccessary.
Please give me a CALL (i dont have texting) at ----
Thank You so much for looking!

I should also mention that i have checked the VFAQ pages on timing belt changes and i've seen the black and white drawn up pictures but they still confuse the shit outa me. I've been having trouble locating the Balancer Shaft Bolt Plug where i am suppose to stick a screwdriver into.
It says i am also suppose to rotate the oil pump sprocket another 180 degrees or something like that.

If someone could show me a live picture with the Balancer Shaft Plug pointed out, and which sprocket or whatever im suppose to rotate after to phase it correctly, it would help out A LOT
Thanks!
 
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yea bro sounds like the balance shaft is out of phase to me. just get a balance shaft elimination kit and your troubles will be gone for good. The oil balance shaft is not really needed on our cars plus the price for the kit is not expensive 55.00 on stm and extreme psi and dsm graveyard, stay away from ebay on this might be cheaper but not worth it.

Balance shafts are commonly found in inline four cylinder engines such as the Mitsubishi 4G63 which, due to the asymmetry of their design, have an inherent second order vibration (vibrating at twice the engine RPM) which, contrary to popular belief, cannot be eliminated no matter how well the internal components are balanced. 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.
The basic problem presented by the concept is adequately supporting and lubricating a part rotating at twice engine speed at the higher RPMs where the second order vibration becomes unacceptable.

So why do it? The main reason for balance shaft elimination should be reliability as power gains are minimal. As you can see it inherits a potent lubrication problem and unlike the name suggests it's job isn't to balance but merely masks off the vibrations. Silent shaft is a more appropriate term but not used as commonly. Although the chances are slim, it's still one less part that can fail.
The good•More HP to the wheels
•Zero chance the balance shaft belt will fail and kill the timing belt
•Zero chance the balance shaft bearings will fail and damage the rest of the motor
•More oil pressure to the rest of the motor
The bad•More vibration is felt in side the car (no more is made, just more is felt)
•More oil pressure to the rest of the motor,


*1 You can use your existing bearing if you're able to pull them out without damaging it.
*2 This is optional but recommended.
* Same parts apply to all 6-bolt, 7-bolt, 1G & 2G. Also applicable to the EVO1-3 and Galant VR4.

3. Balance Shaft Removal

Front case removal

Remove the plug bolt located under the 3rd cylinder freeze plug about 2 inches above the oil pan. Inset a Phillips screwdriver with a shank diameter of 8mm (.32 in.) into the plug hole to lock the balance shaft.

Check to be sure that the screwdriver goes in 60 mm (2.36 in.) or more. If the screwdriver will only go in 20 - 25 mm (.79-.98 in.) before striking the counterbalance shaft, turn the sprocket once and check that the screwdriver goes in 60 mm (2.36 in.) or more. This will lock the balance shaft and prevent the oil pump sprocket and driven gear from spinning while loosening the nut/bolt.Remove the oil pump sprocket.
.

Remove the castle plug. The special tool isn't much help since it slips off when torque is applied. Just tap the teeth with a blunt end to break it loose.Remove the underlying o-ring in the front case groove.

Remove the driven gear bolt that secures the oil pump driven gear to the left balance shaft.Remove all accessories on the front case and remove the front case from the cylinder block.NOTE : If the front case sticks to the block pry over the M10 bolt where the flange is the thickest. Cover the crank shaft key with a cloth to prevent damage to the oil seal when pulling out the front case.

4. Balance shaft bearing install
Install the bearings flipped 180 degrees at the vertical axis to block off the oil hole. You can see the bearing oil hole is now to the left.NOTE : Install the rear first. You can use the balance shaft's front end since it has a larger diameter than the rear bearing.
The left balance shaft bearing can be eliminated since the oil is fed through the shaft and not from the block.
.
5. Stub shaft install
Install the stub shaft to the oil pump driven gear and torque the driven gear bolt to 25-29 ft.lbs.
Use red loctite or equivalent!

Install the oil pump gears so that the timing mark are shown. You can opt to pack the space with petroleum jelly to build oil pressure faster when priming the engine.

Install the oil pump cover and torque to 11-13 ft.lbs. The cover is installed dry without any gasket.

NOTE : Since we're eliminating the balance shaft there's no need to align the timing marks on the pump gears.
.
6. Front case plug install

Remove the front case oil seal (red arrow) and install the rubber lined plug in it's place.The black arrow on the front case is where the balance shaft belt tensioner bolts to. The tensioner is replaced with a shorter 8x14 bolt.NOTE : Most recommend the use of sealant at the plug and bolt flange. At the plug I never had a problem, when reusing an old frontcase I had oil seeping through the bolt. Above and below the bolt is where the oil passages are so I placed a 1" O.D washer under the bolt and it took care of the problem. The washer used in the tensioner arm works great.

Install a new gasket and lube the crank oil seal and temporarily bolt the front case to the block.Mount the oil filter housing with a new gasket and torque all M8 bolts to 14-16 ft.lbs.NOTE : The M10 bolt in the red circle should be tightened at a torque of 20-25 ft.lbsInstall the castle plug and torque to 14-20 ft.lbs. Don't forget to install the o-ring on the front case groove, you risk cracking the front case if you torque the castle plug without it.Install the oil pump sprocket after lubricating the oil seal and torque the nut 36-43 ft.lbs. This should be done before installing the oil pan as there's no easy way to lock the sprocket with the balance shaft gone.
.
7. Crank shaft sprocket spacer
The spacer also from the Mirage 1.6 DOHC goes in place of the crank shaft sprocket "B" that would have been spinning meaninglessly without the balancer belt. Not really needed, but it weighs 2oz which shaves 8.7oz off the rotating assembly. Not bad for $7.

Put everything back on, time the belt and you're done.
.
With the added vibration, I strongly suggest you clamp the oil filter to prevent it from coming loose.

8. How to fix the high oil pressure

Removing the balance shaft without pulling the motor
0.Remove timing belt, downpipe, transfer case and oil pan.
0.Remove alternator, power steering pump, cross member, front and left motor mount to drop the engine low enough.
0.Remove the front case with the left balance shaft attached. This involves pulling the crank shaft sprocket and everything else over the front case.
0.This is all done laying on your back with oil dripping on your face :D

I hope this helps.
 
this all helps a lot, thank you so much. I knew about the balance shaft delete for a while, but i want to get the AMS Balance shaft delete kit, so i am saving up for that. I just finished phasing it today and its all good now. But dam, it seems like a bi*** trying to get it out... LOL
What really confused me is that in all the instructions i read, i was never told the plug bolt would be above the downpipe and that I would have to take it off... That was what got me...

But hey, i am going to keep this thread open and when i get my balance shaft delete kit, i will be sure to open this up and follow these very detailed instructions. Thanks!
 
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