$$ Spun Rod Bearing In Fully Built Rb30 :(

[ZT-R]

Yea, i just wanna be clear I'm not blaming RIPS or anything for this. Robbie has been emailing back and forth trying to figure it out.

[zebra]

It certainly looks like one of those unfortunate things.

I do love that Zed, one of the nicest I have ever seen.

[Shoota_77]

Please, please, please post the results.

This is the greatest fear of all fresh engine rebuilds (apart from blowing up on first start!) so I personally would love to know what went wrong so we can all be more vigilant in certain areas when building our engines.

Hopefully it's something simple like oil surge from a lack of baffling in the sump or something like that.

Best of luck with finding the cause. Even worse than than the result is not finding something that categorically caused the fault, leading to having to rebuild it and hope for the best....

[mitchum]

what was the bearing clearance set at?

What bearings where used?

What did Rob see that might have caused an issue?

[ZT-R]

Not sure. The pan is baffled with external pickup on a tomei pump modified for external pickup. I might go back to internal pickup since this happened anyway.

[NYTSKY]

#@R32GOJIRA

This guy is looking for a new RB30 crank.

[XKLABA]

Not sure. The pan is baffled with external pickup on a tomei pump modified for external pickup. I might go back to internal pickup since this happened anyway.

could there be a possible air leak in the external pickup to the pump or where it connects to the pump

I've done an external pickup on my 26/30 as well and went to great lengths to make sure there are no possible leaks especially in the fittings

this is really just an idea for something to look at, the external pickup IMO is a better way to do it on a rb2630

[gtr jet]

I had the same thing happen in my freshly built 26. I was driving one day and bounced off the limiter a couple of times in the wet but I didn't really think much of it, I'm guessing the crank may have had some starvation at this point though.

Started the car about 2 weeks later and it spun a bearing in the driveway.

When the engine was stripped it turned out the bearing clearances weren't correct.

[ZT-R]

Been getting some pic request, so i will just post a few here.

[zebra]

man that is nice!~

[Simon-S14]

very cool car!

[ZT-R]

Just going to put it back together and blow it up.

Here I am deburring the block. I should have took more pics of this before. As far as castings go it was pretty flaky. I the corner you could drag a pick over it and get shavings/casting grit, whatever you want to call it to come off.

Mains back together, everthing was mixed down to the tens of thousands and confirmed by plastiguage, just to be sure.

2-5 rods back in, kept number 6 out so i could balance the new rod to the old ones. The new rod was 4 grams heavier. Now its 0 grams heavier. Builders typically call within 4 grams "Balanced".

Quick laugh using my "Specialty" dead blow. Kind of Ironic looking.

Number one after 20+ mic jobs by me and double checked by 4 other machinist. we found 2 tenths of a thousdanth of taper that was it. no out of round or anything.

This was the loosest. Everything elese was .00018 vs .00020, which is really what i would rather see on all of them with this big ass tomei oil pump.

Number 1 rod was plastigauged every 45 degrees of rotation too, cause why not...

All ring gaps where checked while at it. All good.

[Shoota_77]

Ha ha, awesome deadblow. That's dedication, getting you're own hammer made! Joke.....

Like I said before, it sucks when there's no clear cut reason for the failure....

I'd definately look at your oil supply while it's out. I can't remember if you mentioned about an aftermarket sump baffle? Definately put one in if you haven't.

[SiR_RB]

did you end up cleaning the block thouroughly before putting it back together to remove any bearing remains etc from oil galleries

[luke gtr]

did you end up cleaning the block thouroughly before putting it back together to remove any bearing remains etc from oil galleries

this.

also, clean the galleries in the crank?

is it grub screwed so you can clean it?

as I was saying in my first post in this thread, looks like there was something in the crank galleries to the first rod.

The remaining damage looks to be from that initial damage.

if the crank wasnt cleaned properly, it may have had some remnants that stopped the oil flow.

also, nice tool box.

[NYTSKY]

For a RIPS engine you would think you get main studs instead of the stock bolts, no?

[luke gtr]

For a RIPS engine you would think you get main studs instead of the stock bolts, no?

they are an option arnt they?

[ZT-R]

Robbie doesnt use them on the 1400hp engines he runs either, im sure they are an option, but im not pumping huge power. Yes i have a trap door and all that in the oil pan, ill try to post a picture later.

Yes i took the crank out and polished it and hot tanked the block then when it came back i went through it quite well myself too.

[luke gtr]

I like your updates.

fingers crossed this time you have many miles of trouble free motoring.

[ZT-R]

WTF are these? i found 1 in my oil pan and on in my head. They are not the oil restrictors, i checked that. i searched high and low, maybe a part of a valve spring but they look to straight to be something like that.