R32 Gtr Oil Pump Failure

[mico]

nismoid pls dont close this thread. i had my oil pump fail today on the dyno at just under 400awhp and i am hearing conflicting stories that the ross balancers can do this. i was told that an ati or a new stock nissan balancer would be much better. has anyone had any oil pump problems with a ross balancer fitted ? what power were u running ? i know of the early 32 oil pump drive probs but i did not think that they were this weak, and have not heard of them failing this early in the game. especially with a good brand new balancer. opinions pls.

[DVS JEZ]

Is it the factory pump or new one?

What RPM did it let go?

Sorry to hear man.

[mico]

thanx mate it let go bout 8k, never revved past that. and yeah totally stock pump.

[blue_vl_t]

really, this seems like the norm,

I hate to say it, but an old oil pump and narrow oil pump drive with over 7500 rpm and this is where the problem usually occurs.

bit of a hit and miss really, some seem to survive, some don't.

sorry to hear though mate

[mico]

yeah cheers mate. i was well aware of what could happen, but more seem to survive than not. i just dont know now what to do. keep the ross balancer and get a billet pump or a new std nissan balancer. or maybe ati ?? ahhh i dunno.

[mico]

cut open the filter and there is 2 very tiny chunks. thats all. the engine was shut down straight away so i think im very lucky and could have been alot worse was making no engine noise either.

[blue_vl_t]

what is it you think is wrong with the ross branded balancer??

[KiwiRS4T]

I have never heard of a Ross Balancer destroying an oil pump but then I don't know much - would be interested to hear of anyone who knows/thinks different. Sounds like you need a crank collar and a brand new pump.

[mico]

people kept telling me after the failure that this is a problem with ross balancers. but now im not so sure because so many people use them. surely a brand new balancer of this brand cannot be attributed with the pump failing ?? ill make some calls tomorrow to get as much reliable info as possible. just snapped a half inch drive trying to remove the balancer aswell, happy days

[mico]

timing belt loose now aswell ...

[SimonR32]

My old GTR motor had a stock balancer (balanced with the new bottom end) and it was running fine, it was then switched to a ATI balancer (the guy who purchased my car got the wrong one for a R33 GTR and it kept flicking off power steering belts) so he changed to a Ross balancer.

The motor then proceeded to lunch itself, shitting a oil pump, cracking the block as well as damaging the bearings.

The motor was fine for 2 years running between 500-575rwhp and then suddenly after changing to a ROSS balancer it broke in very short period of time!

Not blaming the ROSS balancer and it may be a coincidence, but food for thought

[BoostdR]

If the engine is balanced correctly you shouldn't have a problem.

Remember, crank, rods, pistons, harmonic balancer, clutch and flywheel all need to be done

Incorrectly adjusted timing belt, power steering and a/c belts don't help either.

Hitting the rev limited is also a sure fire way to break 32 pumps.

I feel the problem was not the balancer but most likely installation.

Matt

[femno]

Been running a ROSS for a few years now, no problems with oiling at all.

[ylwgtr2]

a question for you.....is the balancer gripping on the crank/woodruff key correctly?reason i ask is that is ive seen a balancer that had stripped the woodruff key and was loose on the shaft,the bolt bound up its own thread and refused to come out(it wound out 2 turns then was rock solid)This engine had a crack in the pump gears because of the balancer wobbling back and forward like a dick in a shirt sleeve

Edited May 9, 2011 by ylwgtr2

[simark87]

Well that depends how big the dick is..or how small the shirt is

Funny line though..I'll use that one!

[mico]

^^ nah its tight trust me, tested the thing b4 i put it on. then done the vvft procedure. it fitted very snug, excellent fit. any hoo with all the stories im now scared to use this thing with the nitto pump. the ross is probably an awesome balancer, but i dont know that.

[DR 32R]

Why add the cost of an ATI balancer, to the cost of a nitto pump, when you have a Ross balancer? I suspect some one with a pump with strong gears will run your Ross just fine.

[mico]

if u have a read of the thread u will know why

[DR 32R]

I'm looking for something more factual in this thread. A stock oil pump broke at revs, a common occurence especially with stock oil pump gears and stock narrow pump drive. You blame the balancer. I've gone to the expense of the ATI myself, on the advice of the experience of my engine shop, but unlike the stock oil pump breaking I haven't seen as much specifically caused by the balancer you mention.

[mico]

once again if you read the thread i never blamed the balancer at all. i was told that by a very experienced and reliable source, actually quite a few of them. if u do a search on here there is quite a bit of history.