4G15 MIVEC RColt Headjobs - Porting and Polish - The Story So Far

Adam bent his rod a long time ago (see here). It's been a slow road to perfection but everything is coming together smoothly and nicely.






A lot of time and effort has gone into the head, what our goal? no idea yet.
We spent a lot of time finding shops and sourcing parts (parts & more part numbers here). We also worked out that the biggest over sized piston was 1mm. This is the biggest the stock head gasket can take (sizes). Its been quiet a learning experience.










We started at Head Torque in Osborne Park for a head porting, bore and hone, deck the block, machine the head. They cleaned the head and block and installed new valve steam seals that we sourced. They also balanced it all.








You can see the gouge in this photo >>>
Rule of thumb was if you can feel it with your nail, its too deep.

We aren't completely sure what they did, why? Because he couldn't tell us. He had forgot @_@
We then found a huge gouge withing one of the crank journals.










So off it went to Harris Engines, they offered knife edging, but for Adam's daily its probably too much. I however plan to do it. Got the crank reground to .25mm, next size up in bearings.
Originally it was still within stock spec, hence I am not too sure what Head Torque did.

Since then we have installed the main studs, unfortunately we snapped one of the main bolts. For some reason the paper that had the torque vales of the head studs ended up in the box with the main studs. @_@









The crank has now been machined, i plan to start the whole measurement process again and check oil clearances.







Luckily nothing was damaged. Main Studs Install
I then moved into checking oil clearances and bearing installs for the mains. Main cap install
Since the crank was off getting some work done I went a head and gapped the rings to each bore. Took it nice and slow, ring gapping.



The head was then taken to Luigi's Head shop. He ported it out. I have yet to check it all out, but he did his famous head porting with burr bits. It creates a very rough finish that some say helps flow through increase turbulence.
We plan to now run this head against a OEM head down in Northam. Its a 90min drive from Perth, but after some research it seems he will do what we are looking for.