Block Surface Cleanup/Flush Post BHG

[stolensupra]

Hello everyone, I am in need of some advice for tackling a situation I'm sure many of you have been in. This is the surface of my block after blowing my hg.

My understanding is that what I've circled in red are my water passages and blue my oil passages. Is what is in green an oil passage as well?



My second question is after scraping and cleaning the top of the block can i flush the gunk out of my water passages with water and oil with oil? What is the best way to do this?

I would greatly appreciate some good answers from trusted members. Thank you.

 

[airhead04]

That is an EXCELLENT QUESTION! Im in for the answer to this as well!

 

[toyotanos]

It's another coolant passage There are a whole lot of them in the block, the HG just blocks some to get the desired coolant flow through the block and head!

Blue is an oil return, also.

 

[CyFi6]

best is to block off the oil passages with something like a cotton ball, earplug, etc. Get creative, just make sure that you can retrieve it afterward and that it doesn't fall in there! Be very careful about getting debris in the oil passages (there's only a few) and try to avoid getting it in the water jackets, but those are pretty easily flushed out with water. Also be careful not to get any junk between the piston and cylinder wall, shove some rags in there. That big gap at the front of the block is an oil passage too so be careful around that as well!

 

[stolensupra]

@toyotanos: thank you for that info, I greatly appreciate it. @CyFi6 I assume the gap between the timing cover and block is what you're referring to. Good thinking. I may have not addressed that otherwise. Is the small hole between that timing cover gap and the #1 Cylinder an oil or water passsage?

 

[CyFi6]

That small hole you are refering to is an (the only) oil pressure feed for the head.

 

[kneedragger85]

I'm guessing you're leaving the engine in the car? If you put it on an engine stand and had the surface upside down/facing the ground, you wouldn't have to worry about the scrapings since they would be falling to the floor.

 

[stolensupra]

Yea I am gonna leave the engine in the car. Unfortunately I don't have an engine stand or a drive in garage. I'm doing all my block work in the car and my head work in my backyard workshop. Which is better than before. I actually stripped it down in my former apartment parking lot.

Does Anyone know of something good to use to flush out my coolant passages and/or oil passages? Of course other than water and oil, like solvents or kerosene or something? Just stabbing in the dark with this one. Thanks fellas.