If you really get the knocking just at start up, you've more than likely a rod bearing about to go. My supra was doing this recently until i spun a bearing, and it sounded like it was coming from the top of the motor...such a sad time.
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1jz-gte swap (Currently spun #3 rod bearings), Apexi high flow filter, Greddy thrust 3" downpipe, N1 3" catback with cat delete tube, 1 peice driveshaft, Bar and Plate intercooler, and 440 JDM 2jz injectors.
Possible 2jz lower block swap in the works if I can't rebuild the 1j. So troublesome.
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