Coolant passage question

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Fireman

Fireman

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Sep 5, 2003
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Iowa Park. TX
Cleaning the block up and noticed that some passages were open and some blocked. Is there a diagram for coolant flow in the 1FZ FE?

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White Trash of the Elwood Chapter, TORC4x4.org, Cottonland Cruisers.

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The small coolant passages on the webbing between the cylinders were clogged and would only flow from one side of the block to the other. The ones between 5 and 6 were both clear and would flow into the other coolant passages. The driver side one between 2 and 3 was completely blocked. Should all of these be open and free flowing to the other coolant passages like the ones between 5 and 6?
 
Some pics of the headgasket showing blockage. This motor sat for several years.

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White Trash of the Elwood Chapter, TORC4x4.org, Cottonland Cruisers.

ForumRunner_20130323_194355.webp


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Those passages go across to the other side at a 45 degree angle (+/-).
I was able to see where they passed by seeing the "hot spots" on the cylinder walls.
I used a long drill bit by hand to clean the crud out of there before I sent her to the shop.
After she came back I checked them again, and blew a ton of air with different tubes, etc, all over that damn water jacket. There's a lot of crud that needs persuasion to get out of there.

Nice work bro! I just went through all this stuff last summer/fall/winter. Hope yours goes at whatever pace you desire. I was in no hurry, and got tired of hearing "got it running yet?".
 
Yep, that blackish grey crap in the catch pan under the block is what came out after I pulled the oil coolant apart. Lots of passages in there. This one doesn't have to be back together at any certain time but I would like to be driving it! I've got way too many irons in the fire. Go to tomorrow to pick up a new 5th wheel camper to make a new crawler hauler out of.
 
I was told that those are called steam ports. I clean them out with a drill on the 4A-GE corolla engines that we build. I'd do the same with the 1FZ as we
 
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