Fj40 rusty coolant passage (2 Viewers)

[tjhaga]

I have a fj40 2F engine that is in the vehicle and has rust and debris that is the consistency of coffee grounds in the coolant passages. I am using a filter and have used evaporust.I have run the engine and cleaned the filter at least 50 times and I’m still collecting ”coffee grounds” Ive removed the thermostat and and used a hose to flush out the evaporust and still have debris. Any ideas or do I just continue to run it for a few minutes and keeping changing the filter?

 

[pb4ugo]

Typically the rust has settled in the bottom of the blocks cooling passages. The only way to get most of it out is to pull the core/freeze plugs and flush each hole using a probe to break it up. You can pull the block drains and probe the hole while running water thru the blk.

 

[tjhaga]

Thanks for your input

 

[Steamer]

I've used some radical methods on mine which came to me in horrible condition. Lots of threads on this topic.
"HERE'S" a good thread to start with and has some links whithin.

 

[tjhaga]

Thanks Steamer

 

[Ackcruisers]

Keep flushing it and draining it. This is what I did. FJ40 2F Engine Coolant Flush & Fill Maintenance - https://forum.ih8mud.com/threads/fj40-2f-engine-coolant-flush-fill-maintenance.1320476/