By dbird - 12 Years Ago
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This morning, before starting the final leg on a trip to Southern California, when I checked the water, there was a layer of dark brown material on the radiator cap seal. When I got home 180 miles later, the stuff had been deposited again. It hadn't been there before, but I seldom go that many miles between checking fluids. I just reinstalled the engine about a week ago after being out for about three weeks, but didn't do anything to the motor's cooling system while it was out. I'm using the same brand anti-freeze, Prestone, as before. The aluminum radiator has been in for a while. The only thing new to the cooling system is transmission cooling lines to take care of the C 4 in place of the FOM.
Anybody have any thoughts on what these deposits might be? I doubt it's the trans cooler as there would have been water in it when I uncapped it to install cooler lines.
Thanks, Don
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By Talkwrench - 12 Years Ago
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Its brown crud..... ? Dont think its anything to worry about, sounds like your motor has done a bit of work and moved some muck.. Im sure you've checked the oil and trans oil.. If its only on the cap..pfft dont worry, pretty sure mine has a bit of that..
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By pegleg - 12 Years Ago
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Just keep an eye on your engine dipstick. Leaking head or front cover gasket maybe, or just old rust deposits that got absorbed by a longer trip. If it's crud loosened up that's a good thing. I'd flush the radiator and see if it reoccurs.
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By joey - 12 Years Ago
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I'd flush the system. It's a cheap easy way to give yourself some peace of mind.
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