Is there a way to tell the diff between an S4 and an S5 by looking at the motor?

 

on the s5 the oil metering pump is electric, on the vacuum spider theres 3 color plugs on the s5 (on s4 theres 4) on the s4 there this big actuator under the motor near the oil pan that the s5 doesnt have

hope this helps

 

S5's have 10 fin fans, while the S4's have 8 fin Fans

 

S5 has no EGR on the top

 

For turbo motors...

Kouki:
* knock sensor bung on both rotors housings, knock sensor on front rotor
* double TPS
* 2" inlet on intercooler
* electric OMP
* "independent twin scroll" turbo exhaust manifold and turbo turbine housing - look for the crooked wastegate rod
* red / pink fuel injectors with oval connectors
* plastic thermostat cover with no filler cap / flange

Zenki:
* knock sensor on center housing
* single TPS
* 1.75" inlet on intercooler
* mechanical OMP with rod linkage to TB
* "twin scroll" turbo exhaust manifold - twin scroll actuator in front (JDM in rear) - wastegat rod is straight
* purple / tan OR red / pink injectors with rectangular connectors
* cast aluminum thermostar cover with filler cap / flange



-Ted