That's fine. I was just mentioning that the pepper can clump up and make a mess right where the cap seals. Just to wipe it off if it does so it's not just there and makes it into the coolant to circulate in there.
galvanic corrosion, that is what it's called. I googled "why is an anode needed with aluminum radiator" and got a slew of sites talking about it and how it helps identify problems in a cooling system.
duck duck go search AI gave me this tidbit.
Yup dye is an option and is cheap. it should be available at most auto parts houses. Just read the label and make sure it's compatible with the coolant your using. in you pic I noticed that it's reddish orange in color. hope it's not the dreaded Dexcool! that stuff can get corrosive and...
yes too much can clog up things like a heater core, as long as it fine ground, it shouldn't mess with the pump. coarse ground can cause a "sand blasting effect on the pump impeller slowly chewing away at it. It can also get lodged in the pump seals and tear them up too.
btw, didn't you just...
you can, it won't hurt anything. at least that I'm aware of. one thing to note. when you add the pepper, make sure it doesn't stay collected where the cap seals. that could make the cap start leaking with the granules pushing on the rubber
Honestly if it's that little I wouldn't worry about it until it get worse. if anything, get you a replacement cap. I assume your running the cap that came with the radiator from the jungle site. if so, it's most likely a cheap one from china.
what you witnessed is the aluminum contracting opening up the area where the leak is. as it heats back up the metal expands sealing up the leak, until the pressure in the system gets too much and overcomes pushing out at that area. on my 93 I have a coolant leak up against the engine block...
Yup, that is an old farmers trick. and it works. pepper will not clog passages as there isn't any "glue" properties to it. basically it circulates in the system until it is pushed out at wherever the leak is and gets stuck there sealing the leak.
during heat cycles the cap will open (cold) and allow coolant to flow in and out of the overflow. the system is designed so that as it cools it goes into a vacuum state, when the cap opens this allows the system to suck in and "refill it's self" from the overflow tank. Most if the time if the...
if it doesn't leak much, like mine where I have to top off maybe 1/2 a gallon in about a month's time, you can add some stop leak or just leave it alone and keep a jug or two in the back for when you need it while checking levels every so often. Just remember when winter is coming, do a drain...
how often are you having to top off the coolant per miles and how much? if there is a pin hole on the outside where it's visible it can be repaired by someone that can weld aluminum or a good radiator shop.
have you verified that it's not coming from the cap or overflow tube? aluminum...
Well I hate to see one parted out, but I do need an engine for my 93. Camper shells are very hard to come by nowadays for these trucks. If we did to a deal on the engine, I would have to pay for removal and shipping. Not sure My 95 would make the trip.
I had been considering a summer...