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Replacing Oil Pump on RB26DETT

gun-r32

By gun-r32,
in Western Australia

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SteveL Mentor

SteveL

Posted
Posted
Is it an "engine out" job, or not? If it isn't, how difficult is it to get to?

Realistically it's a 'sump off' job because the front of the sump bolts to the bottom face of the oil pump, plus all the cam belt covers, cam belt, crank pulley, etc have to come off.

IMHO, best done with the engine out. It's probably possible to do it with the engine in, but would be difficult and the risk of damaging things is much greater.

N I B Grand Master

N I B

Posted
Posted

Its a real tough job in the car but can be done but usually ends up with oil leaks.

Also be aware that early RB26s have short oil pump drive flanges and using aftermarket pumps is not a good idea with out fitting the JUN drive kit or getting Sweeting and denny etc to mod the nose of the crank(engine out-crank out)

gtrken Grand Master

gtrken

Posted
Posted
Its a real tough job in the car but can be done but usually ends up with oil leaks.

Also be aware that early RB26s have short oil pump drive flanges and using aftermarket pumps is not a good idea with out fitting the JUN drive kit or getting Sweeting and denny etc to mod the nose of the crank(engine out-crank out)

Steve is correct and the other little problem is the 2 small nuts on the sump which can only be undone with the gearbox out as there inside the bellhousing.

Best to budget on engine out which varies between $800-$1.5K to remove and replace using new gaskets, oil, filter,diff oil, coolant etc.

Cheers

Ken

Duncan Grand Master

Duncan

Posted
Posted
Who is australia can supply one of these longer pump drive collars? My GTR aint got oil pressure, being an 89 model its probably sheared the crank drive. Happened at start up so hopelfully wont be a big job.

Any competant machine shop can make up the collar for you.

Basically they make a flat edge on the crank, then weld on a small piece about 3mm at the same height as the standard collar. The new piece and the standard collar will basically double the area that the crank is driving. Then balance it all up, easy as.

Have a look at any oil pump out of an early GTR and you will see how badly it wears the section it engages

  • 2 weeks later...
Topaz Grand Master

Topaz

Posted
Posted
Steve is correct and the other little problem is the 2 small nuts on the sump which can only be undone with the gearbox out as there inside the bellhousing.

Best to budget on engine out which varies between $800-$1.5K to remove and replace using new gaskets, oil, filter,diff oil, coolant etc.

Cheers

Ken

etc....as in what?, is that just the front diff or both?

what about timing belt, water pump?, Ive been told these are good to replace after getting a GTR....

is the "engine out" work almost a necesity after buying one?, how long does it all usually take?

cheers

Tom

  • 3 weeks later...
MYRB30 Rising Star

MYRB30

Posted
Posted

Obviously mine's been given a new crank/engine sometime. I've got the later style crank. The problem is too much silicon on the sump which has made its way into the oil pump pressure relief valve and stuck it partly open. The crank journals are fine. Its the thrust bearing surface that's stuffed. Haven't been able to find anyone willing to machine it either! May have to get another bottom end.

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