I'm in the process of sending the head to the machine shop this week and decided to tear down the block while I was in there for a potential deck/refresh. That being said, I would like some advice from the forum on what to do...
Overview - I was having issues with a misfire that turned out to be a dowel pin that decided to remove itself from the upper intake and make it's way into the #4 intake valve. I then found a great deal on a turbo, manifold, and spare engine so I figured "hey, let's build this for boost because, why not?". Here's where it gets interesting...
All of the cylinders looked great until I pulled #1 piston and saw this (see pictures below). I had the normal oil consumption, but no noise from any piston slap, knocking, etc. No scoring on the journals - the crank looks great.
My question/advice is which direction should I go? Is this block shot? Is my only option to bore the cylinders out and replace all pistons/rings? Have it honed and then replace rings? Bearings? Replace only that piston?
To answer the inevitable question that will follow, the answer is Yes. I've done a TON of research and have read through the turbo threads, several threads about boring over 1.00+, engine rebuilds, full LS swaps, etc. I would like to keep this Toyota engine in here but also don't want to spend a CRAZY amount of money rebuilding this unless it's the only option.
I will also seek the advice of the machine shop, but wanted to throw this out there to you all first.
Thank you all in advance,
Jeff
Overview - I was having issues with a misfire that turned out to be a dowel pin that decided to remove itself from the upper intake and make it's way into the #4 intake valve. I then found a great deal on a turbo, manifold, and spare engine so I figured "hey, let's build this for boost because, why not?". Here's where it gets interesting...
All of the cylinders looked great until I pulled #1 piston and saw this (see pictures below). I had the normal oil consumption, but no noise from any piston slap, knocking, etc. No scoring on the journals - the crank looks great.
My question/advice is which direction should I go? Is this block shot? Is my only option to bore the cylinders out and replace all pistons/rings? Have it honed and then replace rings? Bearings? Replace only that piston?
To answer the inevitable question that will follow, the answer is Yes. I've done a TON of research and have read through the turbo threads, several threads about boring over 1.00+, engine rebuilds, full LS swaps, etc. I would like to keep this Toyota engine in here but also don't want to spend a CRAZY amount of money rebuilding this unless it's the only option.
I will also seek the advice of the machine shop, but wanted to throw this out there to you all first.
Thank you all in advance,
Jeff