When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Drove the truck to work today. While showing it off to a coworker, I pulled the radiator cap to check the water level. I found a layer of brown sludge.
I just installed this radiator earlier this year. Do I just need to flush the system?
It is a re-cored stock radiator. I had an aluminum rad that i ran for a year prior to the switch. Im surprised I didnt see any sludge when I drained the system before the swap.
It's always used a little oil. Last I checked the engine oil just looked dirty. I haven't noticed any water in it.
I think the old girl must be feeling neglected and wanting attention. On the drive home today she decided that she couldn't do 55 anymore. I had to take side streets all the way home. Then the speedometer cable broke. It was only a couple years old.
Hopefully just old antifreeze from the block or heater core. Dexcool was notorious for this when it came out around 1995, it would turn to mud if air got to it, but even regular antifreeze gets ugly and leaves sediment if it isn't changed once in awhile. I would buy a kit to hook up a garden hose to the system and flush it all out with the engine running.
