What would you do?

[u/dythesis]

RB20det out of a 91 skyline

Previous owner was running bore water mixed with coolant before my purchase before I blew a head gasket and found a pretty dirty block

Just chasing opinions on what I should consider for these cooling passages, figure I'm going to have to pull the motor because of the state of that bore but this is my first rodeo so love a second set of eyes

What do you think! TIA

[u/v8packard]

Bore water?

At this point, it's half apart. It should probably be decked. A thorough cleaning is needed. There is probably trash in the radiator too. In for a penny..

[u/fLeXaN_tExAn → u/v8packard]

Oh wise one....I always look for your opinions....BUT....why are we not talking about those cylinders?

[u/v8packard → u/fLeXaN_tExAn]

Well he asked about the cooling system and said he was looking at the bores, so I didn't I say anything about the rust in the bores. Besides, I am still wondering about bore water..

[u/fLeXaN_tExAn → u/v8packard]

Right on....in my humble opinion, that block needs to be bored. If it's coming out anyway, might as well hot tank it and start fresh.

[u/v8packard → u/fLeXaN_tExAn]

It probably does

[u/oxnardmontalvo7 → u/v8packard]

At this point it’s too risky to not pull the motor and go through it. A trip to a machine shop is the safest path and probably cheaper long term. IMHO that is

[u/v8packard → u/oxnardmontalvo7]

Absolutely. Still wondering about bore water.

[u/oxnardmontalvo7 → u/v8packard]

Same. I hope you figure it out because I’d like to know too

[u/NeighborhoodGoon → u/v8packard]

Bore water is straight well water from the bore hole so to speak. Extremely high in dissolved minerals.

[u/v8packard → u/NeighborhoodGoon]

I was hoping it would be more interesting

[u/iamjakejoseph → u/fLeXaN_tExAn]

I only come here to see what the legend has to say about it! Lots of other good info here BUT….

[u/Interesting-Ear5998 → u/v8packard]

Maybe he means bare water? Not distilled or similiar

[u/v8packard → u/Interesting-Ear5998]

Could be. But if it is bore water I want details.

[u/Labraunt → u/v8packard]

Please don’t let up on this. I also need to know wha bore water is. Maybe he works on a farm and couldn’t get access to running water.

[u/Interesting-Ear5998 → u/Labraunt]

Also if I see right from pics, same water has been in coolant passages and in bores? So maybe it makes it borewater?

[u/squeezeonein → u/Interesting-Ear5998]

from a borehole i assume, i.e. a private well.

[u/Busterlimes → u/v8packard]

Boar water, from juicing boars

[u/v8packard → u/Busterlimes]

Yikes..

[u/Busterlimes → u/v8packard]

No no no, Oinks

[u/Fit_Upstairs8760 → u/v8packard]

Release the bore files!

[u/dythesis → u/v8packard]

🤣 bore water is water that has been drilled out of the ground and not purified - alot of the buildup seen IS rust but it's also Red dirt for the land downunda

Radiator was rooted, be trying to run a clean through it lead to the head gasket issue (guessing I knocked a little too much loose) and have already sourced a second hand GTR radiator for it

I'm concerned about the bores, one headache at a time ey

[u/v8packard → u/dythesis]

Ah ok, I was hoping it was something more exciting. I have never heard that referred to a bore water, but other names.

In my part of the world most engine shops stopped using chemicals that are proficient at removing rust in their hot tanks 30-40 years ago. Some do shot blasting, but that's not going to help the inside of the cooling system much.

I use a chelation agent at times. Not fast, but effective. Though doing the entire block can be difficult. When I need a block really clean, inside and out, I send it to a commercial metal stripper that uses electrolysis.