GTROC

SteveN · 15th February 2006, 02:28 PM

What guessing games am i playing? You confused me now glen.

But anyhow, whats the answer, intriguing if nothing else.

Andy Barnes · 15th February 2006, 02:33 PM

I dont know the definative answer as it wasnt my engine, its not a riddle, its a genuine interest as to what happened.

I think that what happened was the engine suffered oil starvation, ran the bearing and it got that hot that it locked up and smahed itself to bits, torn the bolts and eventually throwing itself out of the block whilst in the meantime causing an awful mess of the psiton and gudgeon pin.

The reason I think this happened is due to the blue hot markings around the bearing section of the rod and the way that the bolts are jammed into the rod, they didnt just shear, they were twisted and torn. At some point the base of the rod got hot enough to turn blue.

It came out of the BeeR R32/R34 D1 car at Irwindale. Glen picked it up off the track and it came out that clean, ie with no oil on it at all.

Its pretty impressive which is why I stole it from Glen and kept it

But, I dont know anything about anything so I am most probably wrong

NISFAN · 15th February 2006, 04:07 PM

Could that be due to the wrong rod length ratio's?????

Howsie · 15th February 2006, 04:18 PM

Your depth of field could do with a little work old chap.

Tony G · 15th February 2006, 09:23 PM

Spun bearing causing bolts to yield/snap. Small end looks like a result of thrashing after it left the piston due to piston breakage possibly from being dragged back down the bore and the piston hitting the crank web. If the pin broke the small end bore would be about the same size i reckon. It looks just sqaushed to me. Like to see the piston though. Not sure it would balance up again lol.

skyline69_uk · 15th February 2006, 10:14 PM

Pre-ignition or the piston jamming due to oil lose?

GrahamM · 15th February 2006, 10:59 PM

Did you sit on it?

Howsie · 16th February 2006, 09:56 AM

PMSL @ Graham!

Ajax · 16th February 2006, 04:56 PM

Oil starvation to the big end bearing i reckon, especially if the bigend of the rod shows 'blueing', this will stretch and snap the bolts leaving the rod behind, crank journal comes round again and smashes it out through the side. The flatened out small end is probebly where the crank caught it between the crank journal and the side of the block.
Am i right in saying that RB crank journals and bearings are to narrow and so being the weakest link??

silverzilla · 17th February 2006, 05:26 AM

sorry to hear about the engine failure, set the boost controller wrong maybe?

i notice rb26 rods twist,and rb25 snap in half when something goes wrong

15th February 2006, 02:28 PM	#21 (permalink)
SteveN SteveN is thinking he hasnt been here for ages GTR.co.uk seasoned Member Join Date: Aug 2002 Location: Just off the M5/A40 Cars owned: Mazda RX7 + Golf GTI Posts: 7,219	What guessing games am i playing? You confused me now glen. But anyhow, whats the answer, intriguing if nothing else. __________________ Complete RB26 for sale, inc electrics- To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

15th February 2006, 02:33 PM	#22 (permalink)
Andy Barnes Andy Barnes is unaware they can edit their status New Users Join Date: Jan 2002 Location: Sheerness Cars owned: R32 and R35 GTR's Posts: 3,047	Answers I dont know the definative answer as it wasnt my engine, its not a riddle, its a genuine interest as to what happened. I think that what happened was the engine suffered oil starvation, ran the bearing and it got that hot that it locked up and smahed itself to bits, torn the bolts and eventually throwing itself out of the block whilst in the meantime causing an awful mess of the psiton and gudgeon pin. The reason I think this happened is due to the blue hot markings around the bearing section of the rod and the way that the bolts are jammed into the rod, they didnt just shear, they were twisted and torn. At some point the base of the rod got hot enough to turn blue. It came out of the BeeR R32/R34 D1 car at Irwindale. Glen picked it up off the track and it came out that clean, ie with no oil on it at all. Its pretty impressive which is why I stole it from Glen and kept it But, I dont know anything about anything so I am most probably wrong __________________

15th February 2006, 04:07 PM	#23 (permalink)
NISFAN NISFAN is on a dyno............. a human dyno :) GTR.co.uk seasoned Member Join Date: Oct 2003 Location: Bedford Posts: 1,969	Could that be due to the wrong rod length ratio's????? __________________

15th February 2006, 04:18 PM	#24 (permalink)
Howsie Howsie is apoplectic GTR.co.uk seasoned Member Join Date: Feb 2002 Location: Surrey Cars owned: Various. Posts: 7,613	Your depth of field could do with a little work old chap. __________________ Howsie "A liberal is a person whose interests aren't at stake at the moment."

15th February 2006, 09:23 PM	#25 (permalink)
Tony G Tony G is unaware they can edit their status GTR.co.uk seasoned Member Join Date: Jun 2003 Location: warwickshire Cars owned: 33 gtr v spec Posts: 374	Spun bearing causing bolts to yield/snap. Small end looks like a result of thrashing after it left the piston due to piston breakage possibly from being dragged back down the bore and the piston hitting the crank web. If the pin broke the small end bore would be about the same size i reckon. It looks just sqaushed to me. Like to see the piston though. Not sure it would balance up again lol. __________________

15th February 2006, 10:14 PM	#26 (permalink)
skyline69_uk skyline69_uk is unaware they can edit their status Registered Join Date: Jan 2005 Location: NI Cars owned: R32 GT-R (bhp= a fair bit), E39 M5 Posts: 3,029	Pre-ignition or the piston jamming due to oil lose? __________________ Do it right or don't do it at all. "You're a pack of a**holes!" - Jim Richards 1992.

15th February 2006, 10:59 PM	#27 (permalink)
GrahamM GrahamM is unaware they can edit their status GTR.co.uk seasoned Member Join Date: Oct 2003 Location: London Cars owned: R32 GTR Posts: 438	Did you sit on it? __________________

16th February 2006, 09:56 AM	#28 (permalink)
Howsie Howsie is apoplectic GTR.co.uk seasoned Member Join Date: Feb 2002 Location: Surrey Cars owned: Various. Posts: 7,613	PMSL @ Graham! __________________ Howsie "A liberal is a person whose interests aren't at stake at the moment."

16th February 2006, 04:56 PM	#29 (permalink)
Ajax Ajax is unaware they can edit their status GTR.co.uk seasoned Member Join Date: Jun 2005 Location: Plymouth Cars owned: NISMO 400 Kitted GTR33 Posts: 420	Oil starvation to the big end bearing i reckon, especially if the bigend of the rod shows 'blueing', this will stretch and snap the bolts leaving the rod behind, crank journal comes round again and smashes it out through the side. The flatened out small end is probebly where the crank caught it between the crank journal and the side of the block. Am i right in saying that RB crank journals and bearings are to narrow and so being the weakest link?? __________________ Out of all the things ive lost, i miss my mind the most. Now for sale.... Nismo 400R Kitted GTR33 GT-CULTURE.COM

17th February 2006, 05:26 AM	#30 (permalink)
silverzilla silverzilla is unaware they can edit their status Join Date: Aug 2004 Posts: 104	sorry to hear about the engine failure, set the boost controller wrong maybe? i notice rb26 rods twist,and rb25 snap in half when something goes wrong __________________

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