| Author |
Message |
Daniel Clarke
Goo Roo
NSW
TT 2.5L 6 cylinder
Posts: 2557
Reg: 03-2006
|
Thats cause the engines run a more agrresive timing curve when colder i think Anish.
Joshua, Sounds like a possible Headgasket issue. Could have blown between the cylinder in Number 5 and an Oil Gallery... That will cause some major blow by.. Or the rings have shat themself or some bad piston damage in that cylinder. |
Joshua White
TryHard
Qld
SC400 GT V8 Supercharged
Posts: 166
Reg: 11-2006
|
alright thanks. its starting to get to me tho! been dying to get her back on the road and now she's stuffed  |
Dave Rose
TryHard
wa
uzz31 v8 97
Posts: 127
Reg: 03-2007
|
Josh you could put a little oil in N5 ...and see if you can get a better reading...that would point towards rings?...my guess is one of the ex valves burnt out ...DR |
Joshua White
TryHard
Qld
SC400 GT V8 Supercharged
Posts: 167
Reg: 11-2006
|
so an exhaust valve could cause this? i just purchased a new head and valve seal kit so i'll be getting my mechanic to pull it apart soon and find out |
Miles Baker
DieHard
Vic
66 Mustang GT Convertible, 55 Chevy Bel Air, 69 Firebird 455, 73 Corvette 4sp T-Tops
Posts: 959
Reg: 08-2005
|
If it's not sealing, yes. I would have tested it further before investing in gaskets in case the block is a goner. |
Damian Ware
DieHard
Victoria
UZZ32
Posts: 599
Reg: 10-2005
|
I would also work out how this happened in the first place. Was this a freak failure or was there a problem that caused this (tuning ect). You don't want to go through the expense and time of replacing/rebuilding the motor to have this happen again. |
Dave Rose
TryHard
wa
uzz31 v8 97
Posts: 128
Reg: 03-2007
|
What was the colour of spark plugs ?????..DR |
Brett Moloney
DieHard
Queensland
Supercharged UZZ31
Posts: 592
Reg: 07-2005
|
Josh after reading this thread I hope for your sake that it will just be a gasket that has blown out or split. |
Joshua White
TryHard
Qld
SC400 GT V8 Supercharged
Posts: 168
Reg: 11-2006
|
yeah i hope that too Brett. really hoping! the spark plugs were pretty close to being black. they've all been replaced now. hasn't been tuned as yet cause i haven't installed all the new toys since she hasn't been running good. apparently there is a guy in town here who has a couple of 1UZ's lying around so if its stuffed i will have to talk to him and work out a price. if a valve stem seal is gone could it cause this problem? |
Dave Rose
TryHard
wa
uzz31 v8 97
Posts: 129
Reg: 03-2007
|
Josh not really....air is escaping from valve seats/piston rings/gasket as Brett says we all hope its a head gasket ..good luck..DR |
Joshua White
TryHard
Qld
SC400 GT V8 Supercharged
Posts: 169
Reg: 11-2006
|
alright. thanks guys. well ones on the way so hopefully that's what it is. i really don't wanna replace this engine. its only done 127,000 km so its still pretty young for a 92 engine |
Matthew Werner
TryHard
Qld
jzz30 TT
Posts: 107
Reg: 12-2006
|
not good news. the piston detonated. not good at all. whats cheapest? |
Dave Rose
TryHard
wa
uzz31 v8 97
Posts: 143
Reg: 03-2007
|
Whats the bore like...? |
Matthew Werner
TryHard
Qld
jzz30 TT
Posts: 108
Reg: 12-2006
|
from what ive been told.... bore is no good... (hey josh) (you were signed on as me) shes scored pretty deep.... old man reckons you can replace just one piston.. but from what i have heard in my experience with engines is that if you replace one you should replace all and get the bores all whoned out..... having the head grinded and re-seated would be a smart idea too am i right?
and the cheaper of the two is to get another 2nd hand engine.. but in the long run it would be better to know exactly what you have on the inside...
Werner |
Matthew Werner
TryHard
Qld
jzz30 TT
Posts: 109
Reg: 12-2006
|
re sleeving ,i think, was out of the question too.. which would mean another bottom end..... |
Miles Baker
DieHard
Vic
66 Mustang GT Convertible, 55 Chevy Bel Air, 69 Firebird 455, 73 Corvette 4sp T-Tops
Posts: 981
Reg: 08-2005
|
Another motor for you.
Sorry to say, but that head gasket purchase was a waste. |
Dave Rose
TryHard
wa
uzz31 v8 97
Posts: 144
Reg: 03-2007
|
Yes i think Miles is right .....but what caused the piston to burn like that ?? was it running weak due to the blower? |
Miles Baker
DieHard
Vic
66 Mustang GT Convertible, 55 Chevy Bel Air, 69 Firebird 455, 73 Corvette 4sp T-Tops
Posts: 983
Reg: 08-2005
|
9 times out of 10 I'd say lean condition. |
Cihan Aday
Moderator
www.etuner.com.au
JZZ30
Posts: 2281
Reg: 07-2005
|
If it was running untuned with the blower then its definitely caused the problem. |
Matthew Werner
TryHard
Qld
jzz30 TT
Posts: 110
Reg: 12-2006
|
yer it didn't have any after market stuff on it at all besides the blower (4psi) and a mapasy fuel regulator
well it was only one piston that got mcf**ked.. is that just luck or do people think the others would be just as weak??
Werner |
Neil Griffiths
Goo Roo
NSW
I have a Cadillac  and a Supercharged Manual V8 
Posts: 4318
Reg: 07-2005
|
Shear unlucky I think. |
Cihan Aday
Moderator
www.etuner.com.au
JZZ30
Posts: 2286
Reg: 07-2005
|
Wouldn't be surprised if the AFR's were in the 15's under boost.
I'm tuning a twin turbo 1UZFE at the moment and it was leaning out above 15:1 under light boost before things were settled with the Emanage. |
Matthew Sharpe
Goo Roo
North Island
JZZ31
Posts: 3224
Reg: 10-2005
|
odometer had probably been fudged with too. |
Matthew Werner
TryHard
Qld
jzz30 TT
Posts: 111
Reg: 12-2006
|
guys, got an engine lined up. $900 and its been imported from japan. the guy isn't sure on km's or what it came out of but it looks pretty good from what i see. really i would have to open it up to know. the guy runs a company that imports engines from the states but he has 2 1uz's from japan in his warehouse. what do yous think? |
Joshua White
TryHard
Qld
SC400 GT V8 Supercharged
Posts: 170
Reg: 11-2006
|
sorry that last comment was from me not matt |
Matthew Werner
TryHard
Qld
jzz30 TT
Posts: 112
Reg: 12-2006
|
bastard guy ^
haha |
Joshua White
TryHard
Qld
SC400 GT V8 Supercharged
Posts: 175
Reg: 11-2006
|
just to update everyone on what the problem was in case someone else gets these symptoms. my number 5 pot detonated incorrectly and melted a small piece on the piston itself which then made it mix wrong and play silly buggers. no. 5 pot was a little messy, scored the pot pretty badly and did the rings too. all and all i'm doing an engine swap now and may just re build the other engine if possible and keep it just in case or sell it. unsure which i'll do yet.
ps. not a mechanic and can't say i'm the best with engines but this is what i figured out from my understanding of what i saw and the mechanic said |
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