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Rb26 32 Or 33 Crank?

OFENSV

By OFENSV,
in Engines & Forced Induction

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OFENSV Proficient

OFENSV

Posted
Posted

Just stripped down my motor after the standard oil pump letting go. I think some one has already fitted an R33 crank or its a complete R33 motor as it looks like to me it already has the long nose drive.

But the bad news is the crank is stuffed anyway :) to start off with the front pulley was lose and has damaged the keyway. Also when trying to get the front gear off noticed there to be an awful lot of endfloat from the crank. Pulled the crank out and found the thrust bearing rooted. Not sure if it happed when lost oil pressure or it was alredy worn?? as i had only got down the end of the street before i notice the oil light had come on and i switched it off. Anyway now im after a new crank, doesnt matter if its a 32 crank as i alredy have a proengines crank collar which i bought thinking i had a 32 crank already

sorry about the poor pictures, took them with my phone

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Dobz Experienced

Dobz

Posted
Posted

are you sure its a long nose? just because the flats that drive it look long it doesn't mean the pump engages on the whole thing.

from the photo even though it was a little fuzzy could make out a kind of blue burn mark on the forward tip of the drive flat which looks like about how far the r32 gtr cranks engage on the oil pump.

it's hard to imagine the long nose drive breaking a pump gear unless something was seriously wrong.

T04GTR Grand Master

T04GTR

Posted
Posted

ive seen a very similar problem with a motor. but the oil pump was fine.

debris in the crank oil ways can chop a beasring out in no time. all it takes is a tiny scratch on the thrust bearing. and 500k later new crank needed.

what clutch are you using?

if the pully was loose. and you were giving it some revs. that will destroy the oil pump very quicly. especally if your doing over 7k.

this is a good example of what a "lightweight" crank pully can potentally do.

anyway.....

OFENSV Proficient

OFENSV

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Posted (edited)

yeah it looked like the pulley had been lose for some time as there ws lot of rust dust around it when i pulled it off. the crank bolt was tight but the pulley was still flopping round on the crank and the key way pin is half the size it should be.

pretty sure the crank couldnt be repired, there was atleast half a centermeter of endflot in the crank. and somehow i dont think that happened when the pump died because the rest of the bearings were no where near as rooted.

Im using nismo gmax twin plate clutch.

And yeah the revs were up there when it let go, was over 7k

Think im going to invest n a ross tufbond balancer as the keywy in the standrd one isnt much good. The ross ones any good? they seem pretty cheap too.

Edited by OFENSV

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