i think it is, my friend had the same thing. turn it were the mark lines itself up if it dont line up itself then its not right.

well is it possible for me to have put the balance shaft in upside down? ### it is lined up

You can't really put them in "upside down" persay. Did you follow vfaq when doing the timing belt? If you didn't put a screw driver (or what have you) in the hole in the back of the block, then it's probably just not "inline" the way it should be.

that would've been on the intake balance shaft? and I do remember sticking the screwdriver in there...

you should have just done a BSE while you were rebuilding

The rear shaft turns three times for every one crank turn. You may have that out of sync. Try fixing that and you should be set.

I had a simalar issue. It turned out to be a motor mount. I am not saying thats your problem,but it take about 5 mins to check.

Coreyred95 said:

you should have just done a BSE while you were rebuilding

Click to expand...

BSE?? explain bud Im a newb

How would I go by fixing that because the screwdriver fit in like 85mm like the manual says and the oil pump sprocket is aligned..

Doug Mercer said:

BSE?? explain bud Im a newb

Click to expand...

He might have meant BSD.Balance Shaft Delete

BSE = Ballance Shaft Elimination.

But to answer your question. If this vibration JUST started after your timing job Id check that. Other possible causes are the motor mounts and the center support bearing. I had the center support bearing go bad on me and caused some very weird vibrations and noise.

Im guessing id need to pull my engine to do a BSE?

Balance Shaft Eliminator Kit Install

There's a full guide to the BSE procedure. You can unbolt the driver side mount from the engine, then lower the front crossmember so you can drop everything down low enough to get to from the wheel well.

This seems like a pretty lengthy process.. I didnt realise I would have to remove the oil pan and the front cover.. Is a BSE really worth this time and effort?

It's really up to you. The MAIN reason why anyone really does a BSE is to eliminate the chance of the balance shaft belt of breaking and screwing up the timing belt/bending valves. I personally left mine in since my motor is still for the most part stock.

yea my car is stock for the most part too

The only time I ever had a car come into my shop with the rear balance shaft out of phase the car shook like hell at idle.

yea i will probably just deal with the *little* vibration... it wasnt anything seriouse just more noticable than my old engine..

+1 on the balance shafts out of sync. When I first bought my talon 10 years ago I had the balance shaft belt out of phase and had bad vibrations above 3000rpm so I just pulled the balance shafts out. BSE should solve that issue.

Hmm well I can prob just get them back into sync.. be easier and way cheaper than doing a BSE

the minor vibration isnt going to damage anything in particular?

no, the balance shafts just *mask* vibrations felt by the driver. they don't actually get rid of any vibration. so you will be fine removing them.

The vibration the driver feels from missing or out of phase balance shafts is from the whole engine vibrating. The balance shafts are designed to stop that vibration, and they do it well.

Balance shafts have no effect on the loading of other bearings, but their own bearings are loaded equal and opposite the effects of second order harmonics from the main bearings.

That's why they work very well in making a smooth ride.

. . .They spin at 2times the engine rpm. That alone is worth the delete. The reliability is in the simiplicity.

There are several good reasons to delete the balance shafts. That they don't stop engine vibrations is not one of those reasons.

There are other reasons to leave them in. For example, old pharts think any engine vibration is bad. My Talon still has the balance shafts; funny how that works.

But you're an old fart . . . Like me

The good reasons begin to out-weight the reasons to keep them as you increase the abuse of the platform. . .

A good running setup with a properly machined block will certainly NOT come apart with the bshafts at any "soon" time. What do you care about? what is the purpose of the engine? Will you be revving high or looking to rev to the stock limit everytime its running? Those are the questions to ask for whether it's beneficial to pull the bshafts. After that, it's preference and a way to avoid needless complication. That's all.