Report that engine failure

[andylaurel]

my RB20 let go recently

it actually split the block off on the inlet side corner... like when i unbolted the sump, a corner of the block fell off.

also when i took the sump off, there was NO ROD at all and only about a quarter of a piston left!!!

here is the 1st photo...

NO LOVE FOR RB20s

(note i have not removed the rod from number 6 crank journal, it is simply absent

[andylaurel]

this is where the rod exited the motor

[N1GTR]

Well done!

Thats how you finish a motor off

[Duncan]

Engine/Car:

rb26dett, r32 gtr

Type of failure:

big en bearing #5 spun

Factors influencing the failure:

something big and metal hit the turbo, metal all through the motor. I guess some may have ended up in a bearing

State of tune of the engine:

standard. n1 turbs. standard boost, ECU and tune.

Suspension and tyres:

some jap coilovers and yoko a032r tyres

Oil used and service interval:

mobil 1 changed every race meet

General comments:

Don't drop metal bits into your intake. Thats my tip.

This time it is only rings, bearings, oil pump, machine crank and block, no serious damage it only did a few laps after it all went bad.

And I led for the first 2 laps

[andylaurel]

Well done!

Thats how you finish a motor off

i figure its an RB20

1 down, 50 000 to go.

PS it was in my new 4 door R32 that i picked up on thursday, and proceeded to blow up on thursday night whilst participating in some "close road private testing"

when i picked the car up, i noticed the factory oil pressure guage read 2 bar, and i thought it was innaccurate (sender was f**ked)

turned out that it was reading correctly.

PPS the rev limiter in this car is 8000 rpm

Edited October 2, 2006 by andylaurel

[wingnam]

Engine/Car: 1990 r32 gts4

Type of failure: leaking coolant,

Factors influencing the failure: the brisbane heat,i have no idea

State of tune of the engine: stock bar 3inch jap spec exhaust,apexi filter and hks ssq

Oil used and service interval: currently using fuchs 10-40

General comments: stopped in at officeworks on the way home after leaving ow the thermostat jumped straight up to danger zone, now waiting for my mechanic to have some time to look and fix it.

apart from this the engine has been pretty good in the 1year i have owned it

cars at the mechanic now - as i suspected it has a blown the seals - getting redone now

Edited October 29, 2006 by wingnam

[shanef]

Engine/Car: 1989 R32 Gtr

Type of failure: Spun Big End

Factors influencing the failure: shotty 'repair' on previous spun big end. was obvious when i stripped it down, found newish gasket glue around head, also fresh cross-hatching marks on bores from where they tried to hone it up a bit before they slapped it back together (although u can see in the pics the scratches are very deep)

State of tune of the engine: stock boost, 3"cat back, pods

Oil used and service interval: no idea, just bought car

General comments: just bought the car and had it a week when the omonous death rattle began. Has now been replaced with an RB26/30

http://smg.photobucket.com/albums/v315/Tha...;slideshow=true

[13thracer]

Engine/Car:13 rb25 with rb26 crank rods pistons, hi flow and a few other goodies

Type of failure:worn main bearings and totally rooted number 6 big end killed the crank and one rod

Factors influencing the failure:good old gtr crank snout failure, ending up just turning in the oil pump an not pumping oil

State of tune of the engine:tuned safc

Suspension and tyres:stockish

Oil used and service interval:shell, mobil 1 tried several oils changed every 2000 or so

General comments:pulled engine down found the flats on the crank snout starting to round and also on the flats of the oil pump drive hence the poor oil supply especially all the back at number six

[NXTIME]

Engine/Car: RB26DETT

Type of failure: big end knock->conrod bolt let loose-> conrod went on permanent holidays taking the bottom end with it

Factors influencing the failure: f-wit thrashing car that had just developed big end knock.

State of tune of the engine: Perfect condition built for high hp drag

Suspension and tyres:

Oil used and service interval: motul 300v

General comments: Engine built in Japan, JUN oil pump, but very little done to head by way of oil return mods. Car was towed with a slight big end knock but otherwise running perfect; towed to another workshop and would not turn over. Hole in block - suspected complete imbecile was behind the wheel thrashing the pants off engine resulting in pics in my sig. IQ tests conducted on said driver - result was negative.

[rb26s13]

Engine/Car:

S13 silvia with a R32 Rb26dett (supposely only mid 40k on its life

Type of failure:

rear turbo spat the exhaust wheel

Factors influencing the failure:

skids... (well didnt even get to do a good one.. blew before i even got started)

State of tune of the engine: stock computer stock turbos stock everything bar exhaust fmic and pods and 10psi (actuator pressure)

Suspension and tyres: KYB struts n springs

Oil used and service interval:

fuchs 10-30w had only done about 700k's since last service

General comments:

engine still comp tested well 165psi even across all 6.. car got turned off the towed straight home after wards

[vidospace]

Engine/Car: RB26DETT

Type of failure: 80 Compression in one cylinder (not sure of fault yet, but will post again when the engine is out)

Factors influencing the failure: Old car, no service history

State of tune of the engine: Close to stock but has been boosted in the past

Suspension and tyres: na

Oil used and service interval: Just replaced all fluids, full service and everything.

General comments: Car runs fine. Doesnt chew oil or coolant and doesnt overheat. BUT it runs like crap. Miss fires, looses power across the rev range, very sluggish in the mornings. Time for a rebuild.

[700HP-GTR33]

Engine/Car: RB26DETT

Type of failure: 80 Compression in one cylinder (not sure of fault yet, but will post again when the engine is out)

Factors influencing the failure: Old car, no service history

State of tune of the engine: Close to stock but has been boosted in the past

Suspension and tyres: na

Oil used and service interval: Just replaced all fluids, full service and everything.

General comments: Car runs fine. Doesnt chew oil or coolant and doesnt overheat. BUT it runs like crap. Miss fires, looses power across the rev range, very sluggish in the mornings. Time for a rebuild.

It is not a failure yet...don't drive it...get it out and rebuilt it now...cost you alot less.

[4core]

Engine/Car:

R32 GTS-t 1989 RB20det

Type of failure:

Rings blew on number 4 piston

Factors influencing the failure:

Clogged number 4 injector

State of tune of the engine: stock computer stock turbo, 13psi, pod, stock FMIC

Suspension and tyres: stock

Oil used and service interval:

motul every 5 thou

General comments:

Car still ran beautifully but blew lots of smoke, when tested for compression it only showed 5spi down, but plenty of oil in there. Complete s/h RB20 put in with 104 on it supposedly.

[zebra]

Engine/Car: R33 GTST

Type of failure: Spun Bearing on #2, bent conrod #2 all bottom end bearings stuffed, crank needed regrinding and cylinders needed to be bored out due to scoring of the bores, Stuffed oil pump

Factors influencing the failure: Split oil cooler hose and oil pressure guage not working at the time

State of tune of the engine: Apexi PFC

Suspension and tyres: Standard Suspention, 235/40/18s allround

Oil used and service interval:castrol edge 10W60, had just been serviced

General comments: MAKE SURE YOUR OIL PRESSURE GUAGE WORKS! can save you lots of money!!!

[Sydneykid]

R33GTST RB25DET

235/45/17 Michelin Precedia

Castrol Edge 10W60

4th to 5th gear change at 8,500 rpm

Ooooops got 3rd instead (not me driving)

Result 1 = engine RPM over 10,000 rpm

Result 2 = 12 bent exhaust valves

Result 3 = good excuse to put 0.5 mm larger exhaust valves in it to better balance the inlet versus exhaust flow

cheers

[robbieraver]

engine: rb26dett/89 gtr

type of failure: where do i start,small knock, on closer inspection found a pervious owner/mechanic's botched job to "fix" things up, main bairings gone following that number 2 rod twisted, bairing paticles made there way to the cams and turbos, scoured both, cams dead, turbos ok, bore also scoured, pistons rooted..

factors involved: dodgy previous owner and mechanics who shall remain namless.

state of tune:stock ecu with blitz piggy back,steel wheeled stock turbos, oil cooler, air pods, exhaust, boost unknown.

suspension/tyres: hks springs, stock new shocks, falken rt215 on stock rims.

oil and servicing: unknown..more than likely not good.

genral comments: even a workshop with a good name that specialises in gtr can do a dodgy deal.

[cattivo_69]

R32 GTS4 Rb20det

ok, my baby is just bout to die, rattling started last week, sounds like its comin from the top, however every1 ive had listen to it, reckons ive spun a bearing

so yeh rebuild on the cards, ganna get it strenghtned while im there.. no point doing half the job.

Key signs: idle jumpin up and down, rear bar covered in black crap... installed a boost tee runnin 13psi possibly spiked???

no tune, stock ecu....

my own fault..lol

ah well learn from the mistakes

Joe :-(

[Ceffy_SA]

engine: Cefiro RB20DET, i had done over 50000kms with that engine and was still going until i stuffed it

type of failure: Four Valves slightly bent due to piston contact, turned it into a 4 cylinder RB20

factors involved: Attempted to install a Adj exhaust cam gear, lined up the top end but didnt double check the crank. Crank must have slipped on the belt at some stage which put the timing way out. No valve markings on tops of the pistons so it was only a light tap

state of tune: Was probably making around the 200RWKW mark with a Rx7 turbo

suspension/tyres: JIC Coilovers all round and cheapy 17 inch tyres

oil and servicing: every 5000km's with Motul 300V 10-40w

genral comments: Currently rebuilding the RB20 to original specs using all brand new Nissan gear, (New Nissan Rings, bearings, gasket set, oil pump, water pump and timing belt) pulled engine down to find that number 5 rod bearing was worn, the bores had some light scorring marks and oil rings had collapsed, also oil pump was showing signs of wear around the main drive and probably wouldn't have lasted much longer.

[a20089]

R33 GTR 140K

Racing around the track and blew the original turbo's at the end of session 1. Probable lack of oil, need to put in the extra litre next time.

Running about 1 bar boost, cam gears about 240rwkw.

Edited July 22, 2007 by a20089

[psi]

R33 - RB25Det

died while cruising!

Cracked 2nd compression ring in No:5 cylinder. @64 000km.

unknown reason.

Oil was castrol sythetic. 20-50 or something(cant remember)

Lost engine and turbo. I suspect that when the engine died it fed crap through the oil and blocked the oil pressure feed to the turbo.

There was lots of carbon in the oil passeges when i pulled it down.

Regular service from me, however there are other things on the car which lead me to think it copped a hard time before a bought it, and poor service history.