R32gtr Crank

[NISSANGTS]

HI EVERY ONE MY R32 GTR SPAN A BIG END NUMBER 1 AND THE CRANK IS 7 THOU WARPED THE MACHINE SHOP CAN FIX.SHOULD I GET MINE FIXED AND USE IT?

CAR IS A STREET CAR AND OFTEN GIVEN BIG SQUARTS.I AM REBUILDING MOTOR WITH FORGED PISTONS AND RODS,ALL NISSAN GASGETS ETC.THE ONLY THING I NEED TO KNOW WILL MY REPAIRED CRANK BE OK?

[SteveL]

HI EVERY ONE MY R32 GTR SPAN A BIG END NUMBER 1 AND THE CRANK IS 7 THOU WARPED THE MACHINE SHOP CAN FIX.SHOULD I GET MINE FIXED AND USE IT?

CAR IS A STREET CAR AND OFTEN GIVEN BIG SQUARTS.I AM REBUILDING MOTOR WITH FORGED PISTONS AND RODS,ALL NISSAN GASGETS ETC.THE ONLY THING I NEED TO KNOW WILL MY REPAIRED CRANK BE OK?

Mate, turn off the caps lock.

Specified GTR crank runout is 2 thou (max), so 7 thou is a bit much. Straightening a crank is a very common procedure, and, no, it doesn't affect the strength of the crank (assuming they know what they're doing).

Edited January 31, 2007 by SteveL

[R31Nismoid]

By the time you fix that, get a collar added etc etc.

Far easier just to purchase a new R33 GTR crank

[NISSANGTS]

sorry about caps lock,nissan sell only 1 crank now and i am told it is the better unit.but a price of 1100.00 i was looking at another option.the second machine shop can regrind 20 thou and they asure me it will be fine and crack check the crank.

[Fitzpatrick Speed Works]

never machine a nissan crank much further than 10 thou as the side clearances will really run out, you need to radius then you will start going through the factory nitrating and you will have alot of probs. Generally I would say its ok but what bearing you going to get for 7 thou, you will find you will need to run to 10 more than likely. As stated good idea to fit a collar and a bigger oil pump, buy the time you do all this at a guess your machining costs are going to be up around $600, probs a better option to get a new one, but hey its up to you can be done.

[gun32gtr]

if reckon if it was me spending all this cash id be going for the 33 cranks with upgrade oil pump. do it once,do it right...

[dontfeelcold]

Once you have ground the crank alot, why can't you re-nitride it?

[Sumo]

You probably could re-nitride it, but this all adds to cost - and makes a new one seem even more reasonable if your going to spend that much on fixing the old one.

The old crank has done what? 100 000kms? Im sure a new one looks much more attractive.

Cheers

Sumo

[Fitzpatrick Speed Works]

nitriding is a very tricky process, especially to achieve the results the standard factory nitriding has achieved, its a waste of time and you probably ruin 1 or 2 cranks to get the process right, would you want to run the risk???? I am talking from experience, and anyway the crank wont need this if under 10 thou which it is!!!

[NISSANGTS]

thanks every one for the input,i have bought another r32 gtr crank that has been machined 10 thou off big ends and mains,i am taking to machine shop tomorrow to recheck and see if i can use.

stuart