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Forged Internals Rb25 Drama

mickr33couple

By mickr33couple,
in Engines & Forced Induction

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mickr33couple Community Regular

mickr33couple

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hi all im new to sau hopefully this is in the right section,

ill get straight to the point,

i bought a r33 which has been fully rebuilt 2000ks ago forged internals, plenum, high mount manifold, hybrid or garrett turbo cant remember what it is, apexi fc, hybrid fmic, coilovers, fuel reg, 044 pump, been told by the owner it had a GTR oil pump fitted when rebuilt, now i bought the car without hearing it as the owner pulled the head off, yes i know stupid thing to do but i got this r33 cheap... cheaper then buying a 6boost plenum and high mount manifold...

now the old owner said reason why he pulled the head off is because he started to low oil pressure (cluster gauge) took it to the engine builder not sure if he checked it over but anyways told the owner the cluster gauges always stuff out common problem anyways, the old owner said that the car lost all power like it wasnt making boost...

now nothing has been said about a drive collar been put on the crank for the GTR oil pump do you believe the pump has shit its self and thats why it had no oil pressure and now stuffed the motor?

i have spoken to the engine builder and he hasnt said boo about a drive collar fitted...

old owner story always changed he was also on rev limiter when it f**ked out... my guess is oil pump shit it self

i will be pulling the motor apart to inspect just thought ill throw this up

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The Dan Grand Master

The Dan

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Why a GTR pump fitted to a to a RB25 crankshaft, sounds pretty stupid.

They are the same factory pump anyway.

I'm guessing he means N1

A quick search is all that's required to know to stay the hell away from those pieces of shit.

mickr33couple Community Regular

mickr33couple

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Thanks guys, so hopefully it has a "GTR" oil pump in it like the engine builder says it does therefore likely hood of it f**king out like the N1 is pretty slim, engine builder said the gtr pump cost $1000 so I'm not sure if it a n1 oil pump guess I gotta wait to pull it apart fingers crossed bottom end is fine

mickr33couple Community Regular

mickr33couple

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Anyways I do believe its a n1 oil pump as he said it was a upgrade from a standard pump and seeing as n1 pumps are high flow... So guess the crank doesn't have a collar and now has scored the bearings and crank

GTScotT Grand Master

GTScotT

Posted
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Thank you, so my tale on this engine is that, oil pump has fail due to engine builder not doing what is required with fitting a n1 pump which has now (guessing) f**ked the bottom end

You wont really know for sure until you rip it apart, which I recommend is the next thing you do.

If you pull it all apart you might find some simple issues and can salvage the remainder of the built motor.

If you make an assumption that the problem is X Y or Z and try to fix that you could just be in for more headaches and lose the rest of the goodies the motor has to offer.

mickr33couple Community Regular

mickr33couple

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You wont really know for sure until you rip it apart, which I recommend is the next thing you do.

If you pull it all apart you might find some simple issues and can salvage the remainder of the built motor.

If you make an assumption that the problem is X Y or Z and try to fix that you could just be in for more headaches and lose the rest of the goodies the motor has to offer.

Thanks for your advise, I am deff stripping the motor down to find out what went wrong, head is already off just gotta strip the block now

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