Jump to content
SAU Community

Recommended Posts

  • Replies 148
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Posted Images

Here are some more pix.

The gudgeon pins were all siezed to the rods instead of being floating like they are supposed to be. The failure was not due to any fault in the piston but the stupidity of the engine builder.

Edited by Blitz

Sorry to hear about your woes Matt, but for legal reasons we cant allow businesses to be slandered on this forum, justified or not

post-2338-1124347217.jpg

post-2338-1124347315.jpg

Edited by Blitz

I'm no expert engine builder but I have seen gudgeon pins walk out and run on the cylinder walls . Generally the locating circlip (sp ?) has failed and no longer locates the gudgeon pin . I'm told Spiral locks never fail if fitted properly , may be worth a look .

Cheers A .

The spiral locks didn't cause the failure. The gudgeon pin as I said was not floating on the rod causing the spiral locks be to simply smashed out. I also have 2 bent rods....

the spiral lock on number six was a bee's arse from coming all the way out also.

The gudgeon pin should fit into rod with only palm force and slide along the length....these are all rock soild.

Edited by BOOSTD

Ive built quite a few engines over the years and have found that i usually have to hone at least one conrod per build as they have been to tight.The last motor i recieved for rebuilding was a freshly built sr20 with hks pistons that started making death rattle noises.I thought for sure i would find at least one tight little end but ended up being tight piston to bore clearance (1 thou).Made a mess of one piston and bore and the others looked like they were ready to grab and tear.Had a lot of wear on the skirts for a motor that had only done a few hours work.

That's a really odd failure. The small end clearance is only .0002-4" which is really just enough for the pin to push through with light thumb pressure. How long did the engine run before this happened?

It's strange for there to be enough side load on the pin to force the side of the piston out, even with the pins seized in the rod.

Any decent engine shop will warranty their work though, have you spoken to the shop yet?

The engine lasted 300km.

Side load was magnified by my rods being bent from the siezed pin.

The shop sent me packing with only an oil leak warrenty after trying to over charge me. The response was, "you didn't get a written quote so I can charge what I like" I am letting the authorities assist me in the right process for compensation.

The engine lasted 300km.

Side load was magnified by my rods being bent from the siezed pin.

The shop sent me packing with only an oil leak warrenty after trying to over charge me. The response was, "you didn't get a written quote so I can charge what I like" I am letting the authorities assist me in the right process for compensation.

Thats bullshit! Best of luck with it all Matt - hopefully the car is sorted soon.

That warranty is bs.

Ive been through consumer affairs before, and it states if you dont get what you pay for, you are entitled to a refund...

ie if you pay $200 for a watch, you expect it to last / work properly...

Ring consumer affairs, and tell em your motor lasted 300km's..you will have a case for a refund, as no one expects a motor to die after that short of a time.

Good luck :P

this picture does not do the damage justice :rolleyes::(:unsure: the bit you cant see is the depth of the score, i was quite disturbed when i saw it.... but, we will sort you out and get you back on the road ASAP!!!!!

http://www.skylinesaustralia.com/forums/in...pe=post&id=1538

hopefully these pistons serve me well.

the new motor should be going in about 3 weeks. i will let you know how it all goes

Just a tip, have a very close look during assembly at the clearance between the oil squirter and the side of the piston, if you move the piston from front to rear in the bore you will see they run very close. We modify the locating lug on the squirter slightly to move the squirter away from the piston.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • Yeah I suspect even if you hold airmass per cycle/cylinder constant if you get too far away from stock you're still going to have problems running the factory tune within the bounds of the factory load scale. Cams, different displacement/rod ratio, etc. I'm just lucky that the GTIII-SS with wastegate boost + CA compliance cats is pretty much equivalent to stock turbos. When I have actual space I can finally get it tuned and modify the fuel system for flex fuel to 100% handle any detonation concerns when cranking the boost to whatever those dinky turbos can put out.
    • I would say no, why, because my daughter, who also lives in Goulburn, hasn't recommended us going there Pity, as we miss all the German joints around in Sydney, actually, the restaurants are the only thing I really miss about Sydney, and a special mention to Ishibanboshi at Bondi Junction, their Kara-age Don is heart cloggingly deliciousness (always added a special boiled egg...or 2) 😋 
    • Does that German restaurant still exist in the old place out the NW end of Goulburn? When I say "out the NW end of"...I am really being vague. It was 1997 when I was last there, and the only point of reference I can recall is that it was on the opposite side of the main drag from the big merino. And when I say "opposite side of the main drag", I don't mean "on the main drag". It was either a couple of streets back from there, or might have even been out in the sticks a bit further. Was an old farm building or mill or somesuch. And when I say "the big merino" I might actually be thinking of a completely different part of town, because I just looked on maps and the big bugger is not where I remembered him to be! The food was good, consisting largely of various German mystery-meat sausage/loaf things and kartofflen.
    • So while the second sentence is completely correct and the whole point of the conversation, the first sentence bears consideration. If this bloke is just hoping to throw big turbos on and drive it around, because there are no helpful facilities at all in his tropical paradise** then he likely has zero chance of even knowing what the TP is on the last column in the stock maps, let alone know whether the ECU is operating anywhere near it or past it. So the point is very very moot. And, per what I said before, at stock boost on those turbos, you may well be off the end of the map. **I'm just back from Vanuatu, so I know exactly what small Pacific nations can be like wrt paradise without requisite facilities. But it's not even that simple. I put a high flow on my car and had to drive it around with a proper tune because of the lack of opportunity*** to put the bigger AFM and injectors into it to allow it to be tuned. I had to turn the boost down to less than I had before, and back off the boost controller's ramp, because it was exploring parts of the map that it didn't drive in before, and really couldn't access for tuning on the dyno either, and so was pinging. It was still well within the last column, because when I first**** set up the Nistune on the Neo I rescaled all axes of the maps to give some more space to explore. ***Family dyno was broken ****This was 13 years ago, and the TIM thing wasn't a thing then and so TP would definitely grow when pushing past the stock tune's limits.
    • Yep, this bit another local owner. I caught it before putting the transmission back into the car, what I noticed was the pressure plate fingers weren't flat and even. It's more obvious with the pull style clutch because the throwout bearing ring was visibly not flat once everything is put together. Nismo should really update their instructions to call out this specific detail. I'm not even sure the clutch as-shipped orients everything properly.
×
×
  • Create New...