4AGE Builds

My first ever 4AGE

Literally broke the day after i bought it.

2 Valvesprings were found to be broken.

2 Weeks later the oil pump broke.

-Bigport Head

-4AC Crank 40mm

-3 Rib Block; 81.5mm sleeved

-Unknown TOTO Pistons

-292 Fritzinger Cams w. OBX Adjustable

-Supertech Atlantic Size Valves

-HKS Valvesprings 

-TRD Plug Wires; Denso Iridium IK-20; Bosch Red Coil

-Modded Bigport ECU

163HP

My c̶u̶r̶r̶e̶n̶t̶  second Build

-7-Rib Block w. Main Bearings Align Honed

-Decked 0.2mm

-Bored to 81.5 with Hone Plate
-Supertech 81.5mm 20mm Pistons

-New Toyota 42mm Balanced Crankshaft, Nitrated

-MRP Rods
-Blacktop ITBs

-16V Bigport Head
-Supertech Atlantic Size Valves.

-Toda 304 intake and Exhaust Cams win 8.5mm lift.
-Toda Valvesprings
-Toda 4-2-1 Header

215 HP

Sadly, there were some major issues.

-Cam Buckets:
All the cam buckets on the intake side (and a few on the exhaust) were crushed  — almost like someone had put them in a vise. This kind of damage couldn’t have happened during engine operation; it must’ve been done by a previous owner, maybe thinking they were hydraulic buckets and trying to “empty” them out. The damage wasnt very visible to the eye, so I didn’t notice anything wrong when installing them. That one’s on me.
The result was a loose fit in their bores, causing noise and, even worse, making some of them stick and causing 
the valves to contact the pistons at high RPMs.
Valves made 2–3 mm deep imprints on the pistons over time. Surprisingly, all the valves are still straight and sealing fine.

-The block had been bored WAY too large — that one’s also on me for not double-checking. The pistons had around 0.5 mm of play.

There wasn’t much blow-by or loud piston slap, but the pistons were rocking enough that they occasionally hit the head on one side.

 Another lesson learned.