Changing Oil Pump For A Gtr

[sLyLinE.32]

How bigger job is changing the oil pump (time, effort wise, guessing big because its internal) in a r33 GTR? Plus parts, how much would I have to be forking out for a tomei or jun oil pump install (just a rough est, I know different stores have different prices).

Anything else I should consider upgrading? Its a stocker atm.

[Duncan]

unfortunately it is a disaster of a job. To get the oil pump out you need to get the harmonic balancer and timing belt pulley off the crank, and the sump off too (which means gearbox and flywheel off as well). It really is not worth the hassle and cost.

If you are veery concerned pull the motor out and do a rebuild at the same time (check clearances, new rings and bearings as well as the oil pump). Otherwise start saving and wait until it dies.

[R.3.2.G.T.R]

@duncan, i was thinking of doing the same except mine is early R32 GTR, so also need to do crank collar mod.. is there any precautions i can take to stop oil pump failing.. i will set rev limiter to 7000rpm.. and use full-syn oil

[Godzilla32]

The main reason they fail is from hitting the rev limiter all the time for extended periods with big power. The vibrations crack the gearset in the pump. An aftermarket balancer will help, but aslong as your not bouncing it off the limiter constantly it wont be a problem.

Deren

[R.3.2.G.T.R]

i also have bought an ati harmonic balancer (500hp) rated one, which i believe can be fitted without removing the engine.. good to know it will prolong engine life as im not up for a rebuild just yet

[sLyLinE.32]

How much was the harmonic balancer?

Thanks for the info guys.

[R.3.2.G.T.R]

i picked up ati harmonic balancer (new) for $540 delivered (ebay).. i think they cost a bit more than that though