Reply With QuoteThats massive......
4age - ae111 blacktop / What caused this
Long story short, I lunched a b/top 20v engine the other night that had been going well and pulled strong with no rattles or noises.
Until on the limiter it decided to do this..
Hole in the block below the oil pressure switch / power steer bracket
Hole in the block below the alternator.
Yep you can see both sides.
#1 piston has come into contact with the exhaust valves...
Crank has a gouge in it, and the balancing weights are missing a bit of metal.
Conrod snapped in 3 and the piston damaged pretty badly
Oil windage tray has been gouged as well.
That is the bearing cap from #1, distorted and massively out of shape.
Ae86 Drivingclub - Toyota AE86 Car Club where AE86 | KE70 | Toyota 86 / GT86 | Subaru BRZ | Scion FRS owners
Thats massive......
1974 MX22 MARK II CORONA HARDTOP COUPE - Awaiting a full restoration
Most likely cause ------ MICE !!!!!!!!!!!!!!!!
ONLY THE GOOD DIE YOUNG ------ I MUST BE VERY VERY VERY BAD
AE86 4AGE 16V N/A TRACK CAR ( RED )
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AE86 ADM UNDER CONSTRUCTION ( STREET CAR) 4AGE 16V , (RED )
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Soarer 1995 1JZ Factory 5speed (R154 )
that 20v went out in style
How high was the limiter?
factory 6 speed ecu / limit, 8400..
Ae86 Drivingclub - Toyota AE86 Car Club where AE86 | KE70 | Toyota 86 / GT86 | Subaru BRZ | Scion FRS owners
a few different guys like on ozclubbies claim that blacktop rods really are strong and they have meat where they are needed, but this is not an isolated case here. I say their not strong enough. Hows the head look?
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Ouch, you weren't kidding about the hole.
ive read around the traps that blacktops can occasionally throw a rod with regular limiter fun. doesnt seem common but can happen. i set my limiter to 8000 when i read that. sorry i forget where i saw it but. at least u went out in glory haha
8500 is supposed to be max rpm for balanced AE92 Kouki rods (And theyre apparently the strongest OEM 4A rods) so I sure as heck wouldnt wanna try 8300 with stock BT rods whose weakness is near notorious!
My condolences for your loss of what looks to have been an otherwise excellent engine!
Next time (unless you jump on the 3S/F20/SR-train) you plan on going rev-limiter get some rods that holds (OEM Silvertop, Aftermarket like Jun or something), at minimal get the internals balanced for smooth revs, or ghetto solution get a 5spd M/T or A/T ECU for lower rpm-limit and more punch.
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