Hybrid Motorsports

Customer brought in his beautiful Turbo Z for inspection. He was experiencing some smoke on high rpm, noticeable exhaust leak, some vibration (possibly parts touching the chassis) and a high idle.







So we immediately considered the turbo to be suspect due to the smoke on top end, valve seal would have presented itself on start up & rings all the time.... So more that likely it was turbo seals failing as oil pressure raised with rpm... was the most logical thought. so we began to inspect turbo shaft play & look for oil in the piping:

This is what we found:





Turbo outlet:





Intercooler inlet:



Turbo:

So we wondered what cause this pre-mature seal failure? we tested for compressor surge that was fine, obviuosly good oil supply , we were unable to check correct oil feed restrictor sizing as this would have been an involved process, So we ran the serial numbers on the chra with our garrett distributor and in was infact a ball bearing unit that was not water cooled , Now some believe this is not neccessary... maybe on ceramic bearing or precision's waterless bearing system, But the dealer highly recommend we modify the existing setup and went on to saying the heatsoak is what cooked the seal.



So we moved onto the exhaust leak and found a few spot where this was occurring:

Downpipe v-band:



Up-pipe v-band ,(attempting to cook the A/C compressor) :





And finally some sub par weld towards the rear of the car:





The idle and the fact that we had to tap the gas to start the vehicle we thought was from the oil soot, on the maf & throttle plate possibly sticking so we disassembled and cleaned these parts:





The result was somewhat better but we added it up to a poor tune: