Great thread on this problem along with the good pics and the fix over on the HybridZ forums today. Something all owners of early R32 GT-R's should be aware of. This looks like a very serious issue that everyone with one of these early RB26DETT motors should check.
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BNR32 Oil Pump Drive Issue
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Did some further research on this with FAST.
Following are the crank part#'s.
12200-05U01 - used in RB26DETT's in the R32 from 89/08 - 93/02
12200-05U02 - used in RB26DETT's in the R32 from 93/02 on and
also used in the R33
12200-05U03 - used in RB26DETT's in the R34
It also looks like the xx01 and xx02 cranks are superceded by the xx03 crank as well.
So from this I think we can assume that if you have a GT-R that was built before 93/02 you need to check the oil pump drive and make sure to upgrade it when you have the motor apart.1991 Case 580K 2WD Extendahoe (aka "Brutus")
2006 Ford F350 SD PSD Crew DRW (aka "Monster")
2006 Kubota F2880 60" Mower & 51" Snowblower (aka "Buzz")
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I assume so since Nissan supercedes to the xx03 crank - but we really should check with someone who has done this - probably Sean?? At the least I think you would also want to upgrade/replace the oil pump at the same time. If the xx01 crank is not damaged, it would probably be less expensive to get a new collar made up for the oil pump drive rather than buy a new crank - depends on if you have access to a good machinist I guess. The other thing to consider is that every time you change a crank, you are going to have to install a new set of main and rod bearings as well. The bearings in these engines are toleranced and are likely going to be different sizes depending on the crank you get (see FSM for an explanation of this).1991 Case 580K 2WD Extendahoe (aka "Brutus")
2006 Ford F350 SD PSD Crew DRW (aka "Monster")
2006 Kubota F2880 60" Mower & 51" Snowblower (aka "Buzz")
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- Denis
Any donations to the Human Fund would be greatly appreciated.
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Originally posted by JZOriginally posted by icydudefrom what i remember i do believe it drops right in.
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Replacing the crank is rebuilding the engine. You can do it on the cheap, but the RB is not a cheap motor.
At least new rings, new bearings, new gaskets.
I can't say I have never done a quick and dirty rebuild, but only because I was very time limited.
Nismo bearings, Tomei metal gaskets, Tomei oil restrictor, ARP head studs , ARP main studs. Put a good oil pump on it. Watch #6 cylinder and it will be very, very strong.
A setup like this was in Nicks car last time. 550 whp and it wasn't at all stressed.Sean Morris
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