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My Nitto Experience

Duncan

By Duncan,
in Engines & Forced Induction

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GTRNUR
GTRNUR

Nitto's new slogan for their oil pumps.... "Engineered to pump engine components... not just oil!"

GTRNUR
GTRNUR

Sounds like the builder didnt re-torque after pulling the cams down to compress the valve springs. If it were a design flaw there would be hundreds of factory standard engines around with the cam bol

Strik3r Experienced

Strik3r

Posted
Posted
The bolt was a cam cover baffle bolt head that broke off. Unfortunate but not really relevent to this.

interesting.. when we pulled my motor down for a freshen up, we found all 6 cam cover baffle bolts from one side in the sump. Amazingly they seem to have done no serious damage to anything (some marks on one of the cam shafts, but engineers have pronounced it fine.

Wonder how commonly this happens.

SimonR32 Grand Master

SimonR32

Posted
Posted

interesting.. when we pulled my motor down for a freshen up, we found all 6 cam cover baffle bolts from one side in the sump. Amazingly they seem to have done no serious damage to anything (some marks on one of the cam shafts, but engineers have pronounced it fine.

Wonder how commonly this happens.

Sounds like very poor workmanship! Who screwed the motor together?

SECURITY Grand Master

SECURITY

Posted
Posted

i can see how it would get into the sump (via. external oil feed or even down an oil return if theyre drilled out) but for it to get into the pick-up then the oil pump is very interesting. any theories Duncan?

Duncan Grand Master

Duncan

Posted
  • Author
Posted

Has the gauze screen on the oil pickup tube been removed? I can't see any other way that a piece that big could work its way into an oil pump.

I am surprised that a bolt was actually able to make it to the oil pump.

yes i was wondering when i first read the thread how the bolt head made it to the oil pump. i also came to the conclusion that the filter gauze on the pick up must of been removed lol. ?? i know its unrelated to nitto's great servive but tell us duncan how did it make it that far through the oil system :S

i can see how it would get into the sump (via. external oil feed or even down an oil return if theyre drilled out) but for it to get into the pick-up then the oil pump is very interesting. any theories Duncan?

Yes that is very straightforward. I run a much larger custom sump with an external oil pickup (it taps into the side of the nitto pump). When originally assembled the sump builder provided an inline mesh filter. The workshop that built the motor removed that mesh filter and ran a straight pipe. I have no idea why. Yes it was a bad decision. No I am not going to name the workshop.

So basically you got some favours the common man wouldn't... Cool story Uncle Dunc :P

Totally incorrect. I have never spoken to a person from Nitto prior to last week. My only dealing with them was to buy a single oil pump at retail. I am not saying they would do this all the time, or for everyone, but I think it was amazing service to do so for *anyone*

interesting.. when we pulled my motor down for a freshen up, we found all 6 cam cover baffle bolts from one side in the sump. Amazingly they seem to have done no serious damage to anything (some marks on one of the cam shafts, but engineers have pronounced it fine.

Wonder how commonly this happens.

Very easy to overtighten those bolts and turn the head off.

What he said. They are M4 bolts, I can't find them in the factory workshop manual so I use the general guide of 6nm (ie f**k all). I will always replace them all every motor from now on as I do with many other engine bolts, too easy to torque them incorrectly.

BTW, its sad how the internet seems to be full of people who want to put shit on every business. sometimes companies do the right thing, and I think it should be recognised among all the bad stories out there.

Strik3r Experienced

Strik3r

Posted
Posted

Sounds like very poor workmanship! Who screwed the motor together?

was nothing like that. Motor lasted 2.5 years making 600hp, ~15 track days, 2 drag days, over 200 dyno runs and ~15000 street km's.

We're taking measures to make sure it doesn't happen again. Best we can figure, combination of heat and vibration has caused them to come loose.

dazmo Proficient

dazmo

Posted
Posted

was nothing like that. Motor lasted 2.5 years making 600hp, ~15 track days, 2 drag days, over 200 dyno runs and ~15000 street km's.

We're taking measures to make sure it doesn't happen again. Best we can figure, combination of heat and vibration has caused them to come loose.

Wont be heat or vibration that has caused your problem mate. As these are never a problem on a standard engine and there are many that have done 100000 + klm's without this issue. Bearing in mind that cam cover baffles are not a part that actually see's any load at all so the extra power output has nothing to do with it. It will simply be a case of the bolts being reused and overtorqued. You are extremely luck that no major damage was done. Best bet would be to replace with new bolts off the top of my head i think the torque seeting if 4-5ft/lb but i would double check.

STATUS Grand Master

STATUS

Posted
Posted

The level of support is extraordinary; +++ to the Nitto boys.

Has the gauze screen on the oil pickup tube been removed? I can't see any other way that a piece that big could work its way into an oil pump.

my thoughts too.

interesting.. when we pulled my motor down for a freshen up, we found all 6 cam cover baffle bolts from one side in the sump. Amazingly they seem to have done no serious damage to anything (some marks on one of the cam shafts, but engineers have pronounced it fine.

Wonder how commonly this happens.

Never seen it.

Supa Steve Enthusiast

Supa Steve

Posted
Posted

Good to see Nitto getting some support on here. To be honest when my engine builder suggested to use Nitto id never even heard of them so i did some research and found a lot of negativity on here. I trusted Paul's (Red R Racing) experience and judgement on this and upon reading this thread im glad i did. Excellent work Nitto especially Andrew, well done.

As Red R doesnt use any rear breather on the head they always recommend Mines style rocker cover baffles, when they are fitted a small dob of ultra grey is applied on the bolt head and smeared across to the inside radius inside ensuring bolt security. All these little tricks are what separates the good builders from the not so good.

STATUS Grand Master

STATUS

Posted
Posted

Good to see Nitto getting some support on here. To be honest when my engine builder suggested to use Nitto id never even heard of them so i did some research and found a lot of negativity on here. I trusted Paul's (Red R Racing) experience and judgement on this and upon reading this thread im glad i did. Excellent work Nitto especially Andrew, well done.

As Red R doesnt use any rear breather on the head they always recommend Mines style rocker cover baffles, when they are fitted a small dob of ultra grey is applied on the bolt head and smeared across to the inside radius inside ensuring bolt security. All these little tricks are what separates the good builders from the not so good.

Andrew was always a str8 up guy even when he was @ turbosmart.

dazmo Proficient

dazmo

Posted
Posted

in standard form they're nuts not bolts but nissan manual says 9-12NM which is the same as the cam cap bolts

In standard for they are m4 bolts. There is no stud to put a nut onto (Have built quite a few RB's so have a bit of an idea of whats in them).

Deano 1 Mentor

Deano 1

Posted
Posted

Good to see Nitto getting some support on here. To be honest when my engine builder suggested to use Nitto id never even heard of them so i did some research and found a lot of negativity on here. I trusted Paul's (Red R Racing) experience and judgement on this and upon reading this thread im glad i did. Excellent work Nitto especially Andrew, well done.

As Red R doesnt use any rear breather on the head they always recommend Mines style rocker cover baffles, when they are fitted a small dob of ultra grey is applied on the bolt head and smeared across to the inside radius inside ensuring bolt security. All these little tricks are what separates the good builders from the not so good.

thats a dam good idea.... and your so right, its all the little things like that ^^ that really make it all worth it!

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