Want your car
undersealing? PM ME!
AO Silver Member
Join Date: Apr 2008
On the 2.0 TS engines, there are 2 balance shafts that run through the block. These have counter balance weights cast in to them. They are spun and in turn in the higher rev range are meant to "harmenise" the engine. Obvs these engines are made by machines etc and they all have tolerances, say number piston weighs 20grams more than no4 piston, when spun at a high rpm this can cause a slight in-balance of the engine. With the balance shafts weight a fare wack, the rotating energy cancels out in-significant balances like that.
Thats the way i understand it anyways! My engine was all weighed and measured when put back together and so im not running the balance shafts.
'97 Alfa Romeo 145 Cloverleaf in Black.
Fully Rebuilt 2.0 TS Engine - Port and Polished Cylinder Head - K&N Panel Filter - Aftermarket Exhaust System with Oval Tip Back Box - 284mm EBC Turbo Grooved and Dimpled Discs - Smoked Side Repeaters - KYB Stiffer Gas Shocks - Ebiach Prokit Springs - Rear Seats & Sound Deadening Removed - 4 Point Sparco Harness - Goodridge Braided Hoses Coated in Blue PVC - Corbeau Forza Sport 2000 Bucket Seats with custom made subframes