oliver1755
Member
I have a problem with the coolant in a 550 gas. I rebuilt this tractor, complete overhaul, replaced a cracked block (cleaned the replacement), had the radiator flushed and serviced and so on. This was 148 hours and 6 years ago. Since, the coolant has gotten a rusty color. I have once flushed the system after the rebuild. This was done by draining the old, putting vinegar in, running until hot, draining, filling with water, ran to hot, drained, flushed through the top with a garden hose until clear, filled with water, ran to hot, drained, flushed with hose again, filled with 50/50 antifreeze and water. All the time, I drained at the block and took the lower radiator hose off.
I checked the coolant as part of the service this weekend, and it is slightly rusty again. I have no idea what is going on here.
So, here are the questions:
1. What is going on here? Any ideas?
2. How should I flush it to "prevent" this from happening again?
3. Any specific advice on antifreeze? I've used normal green antifreeze, mixed with distilled water, to a -30 rating.
I'm kinda concerned that something is wrong inside the block, liners rusting or something like that...
Thanks for your advice.
I checked the coolant as part of the service this weekend, and it is slightly rusty again. I have no idea what is going on here.
So, here are the questions:
1. What is going on here? Any ideas?
2. How should I flush it to "prevent" this from happening again?
3. Any specific advice on antifreeze? I've used normal green antifreeze, mixed with distilled water, to a -30 rating.
I'm kinda concerned that something is wrong inside the block, liners rusting or something like that...
Thanks for your advice.