+1 on what Joey says.

Checking the balance shafts is not something that can be done visually and by no means should it be confused with inspecting the crank pulley/harmonic balancer. I'd guess that whoever installed your cams or screwed with your timing belt let the oil pump timing slip and as a result the balance shaft is out of timing. There's really no way of telling if the shaft is in time without following the factory procedure.

Fortunately for you, while it is a ***** to do, checking the balance shaft timing IS NOT something that requires the car to be shipped to AMS nor any other "super tuner" for that matter. Just find a competant mechanic that you're willing to pay to do the work properly.

 

AND, it can be done with the engine in the car. It is a royal PIA to get some of the front covers off with the engine in the car, but if big my as$ hands can get in there then someone elses can too!

 

Thanks joey, and Propeller, I will get it checked, and NOT rely on the visual inspection as the final answer! I will keep you posted on the results! I owe you guys a "few" favors!

 

I had the 272's installed by eric and the boys at AMS back in late '03. The new 280's were installed AFTER the vibration issues arose. (4 months ago Cams, 5-6 months ago vibrations. exact start of vibration, not sure) I thought the vibration thru my seat could be comming from my side-pipe, but its not. The only "in-between" part I added was a new OEM timing belt! could this have done it? It was around the same time I believe 5-8 months ago. I think the timing belt was done close to the same time one of my clutches was installed.

Q. Could my balance shaft got screwed up during the install of a Timing belt? Thanks in advance!

 

Most definitely. I have no experience with Mitsu timing belts, but on Hondas it is quite possible for the balance shafts to turn when you aren't looking. That's why there are multiple index marks so you can make sure the timing is correct before you put the new belt on.

 

Kev, Yes the balance shaft could have gotten screwed up during the timing belt install. Installing the timing belt with the balance shaft 180% out of phase will cause your vibration problems. You need to have the mechanic take off the belt and redo the balance shaft. Kevin pm me if you need any assistance. In the Mitsu tech manual it tells you how to check if it is correct or not. I can email it to you if you need.

Luis

 

Thanks alot fellas, I hope this is the problem! I will let you know in the next couple days! And Luis, I will be down to Fla between christmas and newyear, I will take you out for a nice steak!

 

Kev,

No problem man, i hope they straighten you out. Call me up when you are down here, and i can't turn down that offer .

 

Yeah if the balance shaft some how got turned 180 degrees out then that would be your problem. I've seen it on old 4g63s when someone did a timing belt job and didn't know about the balance shaft position. There is a bolt on the back of the block that you take out and stick a screwdriver in the hole. If the screwdriver hits the balance shaft, the balance shaft is 180 degrees the wrong way and you will get a vibration.

 

Possible, if so the dealer should be fully responsible, but how can you trust them touching your car? If that's the case explain that you don't feel comfortable with them working on it and work some kind of deal.

"Too much power caused it." A typical remark from someone getting payed $12/hour and could care less about your car you worked hard to achieve. Sorry the remark just keeps bugging me.

 

Yes, you would need to hold whomever replaced you timing belt responcible for this series of events. There would be no excuse in my opinion. And Luis is correct, the factory manual goes over how to index the balance shafts very thouroughly. Just have someone check them (and there are two of them) to see that they are in phase, I have a sneaking suspicion of what they will find however.....

 

You guys are awfully helpful, not only to me, but to others reading this who may or may not encounter a vibration issue.
I will not be taking it back to the ones who missed this the other many times, this time it will be done by a Master tech mitshu mechanic. The other one was also, but I have more confidence in this one. He has dragraced the 4G63's his whole life, and I trust him inasmuch he will find the problem!

 

CAMS ARE OFF 62-92 DEGREES? DONT KNOW EXACT NUMBER, BUT HE SAID THE CAMS ARE HUGELY "OFF" retarted!!!!!!!! is getting instructions for the cam gears to get exact, but they are majorly off!

 

No way the car would even run if they are off that much and the valves have a good chance of hitting the tops of the pistons. I was 5-7 degrees off when I did my cams in my old 03 and the car hardly ran

 

Hmmm... evo 8 ya is correct, the car would not run, valves would have melded with pistons a long time ago. Maybe he meant balance shafts are off? If so that would explain a lot..

And I think that the balance shafts rotate at twice the crank speed, so 90 degrees off would equal 180 degree's out of phase. In other words they would be completely opposite of where they are supposed to be and instead of canceling vibrations they would be exasterbating vibrations....

That is if they are rotating at twice the crank speed, and for some reason I think that they are.