I have pulled the engine from my donor with the intent of giving it a quick cleaning and fit into mine.

What would be a good solution for removing rust which has potential to be a tad deeper than surface? The engine is out of the Jeep so I need something that can just be poured in with the water pump hose clamped and leave for x hours/days.

The idea with this engine isn't to go mad with it but to give me time to overhaul my original engine, however I don't want to gunk up my cooling system by just runnning it as is.





Thanks.

 

Honestly, call a few of your local machine shops and see what they would get to boil it out. I imagine that if you showed up with the block already prepped, and all they need to do is drop it in the tank, they will probably be pretty reasonable. I know it may be a little expensive, but you know it will be clean as a whistle.

 

That could be something to consider on my current block but I wouldn't want to spend a load on this one. This one's job is to keep me going so I can spend a lot on my own engine. The only reason I'm not doing this spare one up instead is this Jeep had been my dads since 2001, so we know the life it's had. The donor Jeep was last on the road in 2003 and had the same miles as mine had by 2020. For all I know it's had the same coolant or lack of in there for that long too.

 

Ah gotcha. You could probably see if you could flush it with hot water and some of the prestone flush chemicals. That would probably be the cheapest way to go. As I can recall, guys around me only used to get about 50 bucks to boil out a block, no other machine work. It's up to you the cost of the work, vs the cost of trying to diy it.

 

depends what your time is worth bro, and mucking around with noxious chemicals and pressure sprayers, truth is, there is no easy way to clean out a block like that, out of the car, as chemicals wont stay in it without a lot of prep, so you can only really pressure wash and scrape with stiff wires.

I would get a quote on a pro block flush, and if I could get that for less than 100GPB, thats what I would do

otherwise you may as well just p!$$ in it (as an old time mechanic used to say to me)

 

Fair point. A friend recommended Caustic Soda. After a quick look into it I did not fancy my chances with it. I may end up going for a more manual, clean where I can approach with this block and leave the professional cleaning for my main block as it will be stripped down anyway.

 

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