clean coolant / oil passages in block while in car?

[jt15833]

I've been doing a bit of work to the block while it's in the car and I want to try to clean the coolant/oil passages of any debris that may have gotten in there.(i'm ghetto decking the block with a steel plate and sandpaper)

For oil I was going to undo the drain plug and pour some oil down the return between cyl 2,3 on exhaust side.

For coolant is there any kind of drain plug on the bottom of the block?

block decking reference - http://jdm-insider.com/Blogs/Eric/?p=1025 )Thanks

[bentvalves]

get a case of non synthetic and flush it good when its first run again.

there is a threaded plug into a water galley on the left side of the engine cylinder number 4 under turbo manifold but debris in the waterways would be the least of my worries, its those oil passageways Id be concerned about.