I yesterday my friends 92 f150 overheated quickly and badly and were not sure why. We've scoped out his truck this morning and his coolant is low, his oil is fine but the coolant looks dirty brown and under the overflow cap it looks like a clay build up.
Here's some pics









We're planning on flushing it today but has anyone else seen this before? How could this happen cause I know he doesn't offroad in this thing.

 

This is my truck, so ill be watchin the replies. He posted because I can't post pictures. Im freaking out, man. Hoping I won't have to tow it home

 

I'd start with a massive flush. You didn't mix pink and green antifreeze did you?

 

definetly get a rad flush kit and use a radiator cleaner before scrapping the engine. mine was filled with rust



mine was filled with water and started to create rust. looked like that coming out. this was AFTER a flush and before adding cleaner

 

No he did not! We're planning on flushing today

 

http://www.toyota-4runner.org/proble...d-mud-why.html

sounds like it might help

 

what color was your coolant before it turned into peanut butter?

 

Looks like the previous owner mixed or tried to fix a leak.

How about apple cider vinegar for a safe "acid" flush? It'll work for fuel tanks, soured clothes kidney stones, condenser coils; why not radiators?

Correct me guys: I heard that if you mix the red and green you get the rusty gunk. The gunk comes from the mix attacking plastic. True or not? And the super mix with any fluid is crap. Green is the only way to go.

Hope it's not the tranny like Truck In Progress's link !

 

i got the txt yesterday that your rig overheated, this is what happened huh lol. the brown coolant dont worry me as much as the radiator cap, i have NEVER seen that before... and it has me a lil worried, keep us posted man.

 

how many miles are on the truck? has the coolant ever been flushed before...but i agree with do a massive flush of the system