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Re: Engine Knocking sound RB30
Sounds like it could be big end bearings, which is probably why it was a free car  May also be the injectors squaling, which is common but does not cause any mechanical problems. Lifters are also a common problem.
RB30 motors are pretty cheap as they were also used in the VL commodore so when the existing motor goes bang, just put in a new motor 
The RB30 motors are near indestructable though. I would recommend a 2.5" exhaust and a set of extractors if you want a bit more fun from the 3L motor though
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N14 Pulsar
VQ35 conversion with major N/A upgrades, 6 spd FWD manual HLSD
18" Rims, big brake kit, Coil overs and freshly painted
Smashed Black VY SS Ute 
The workhorse...
Twin turbo 5.7L LS1 
Boyd Coddington 19" Turbine Wheels
AP Racing 4 Piston Brakes
Tein Coil over Suspension
HKS EVC 6 Boost Controller
PLX Devices DM-200 OBDII
Custom Front Mount Intercooler
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