Well this has been somewhat of an ongoing problem for me for like the past year or so.
Here it goes, awhile back i just did a periodic look under the hood and found out that i was low on anti-freeze, just the reserve. When i looked at the "heater switcher valve" it had a s drip line of anti-freeze on it. So i went out to advanced auto and bought a new one for like $10 or something cheap. Replaced it and it seemed to work fine for another couple months, then the same thing again. It tends to happen more towards the summer months when its hotter outside, or at least thats when i notice it and have to replace the parts.
When the part went bad, or so it looked like the part went bad i took it back and got another part for free cause i told them it leaked here, and they said it was probably a defect. So iv been doing that with about 4 or so of these, but ive bought a couple in that time. I tend to think its not the part now, and that maybe theres too much pressure in the system? I know the lines when i unhooked them originally were put back right so its not a matter of me putting the part in wrong. I have also had some people tell me that i either overtightened or undertightened the hose clamps, which i dont really find them to be that big of a problem.
Its the switching arm that uses the vacuum to work, which is leaking. I think that the only way it can keep leaking is if there is too much pressure in the system. My radiator cap has a red overflow bar on it, if that makes anydifference, which i dont see why it would, i dont leave it up or anything, i just leave it like a normal cap. This has been the only ongoing problem i have had with this truck, works amazing other than that
& its not like i notice any difference in the air conditioning or anything else for that matter, i just have to keep an eye on my coolant level from March to like October
Any comments or suggestions would be greatly appreciated