cattlerepairman
Veteran Member
I had to replace several O-rings that caused slow coolant leaks in the last year or so. There is no evidence that the cooling system gets over-pressurised by a leaky head gasket. I put it down to normal aging.
However, the last leak is a slow-ish leak at the coolant temp sensor. I took the sensor out several times, cleaned and dried the sealing surfaces in the flange and replaced the O-ring. It always seals for a day or two, then starts leaking again.
I suspected a ridge in the casting or something, but I cannot feel anything when running my finger around the opening.
I got angry today and used blue "gasket maker" silicone on yet another new O-ring and assembled the whole thing (I am really good at it now). I have about had it with mixing up 50:50 expensive G12.
I hate using helpers for seals that should seal as-is. It seems to not leak at the moment (let's see in two days or so).
Aside from the good craftsmanship aspect, is there something I should be worried about, having used the silicone?
However, the last leak is a slow-ish leak at the coolant temp sensor. I took the sensor out several times, cleaned and dried the sealing surfaces in the flange and replaced the O-ring. It always seals for a day or two, then starts leaking again.
I suspected a ridge in the casting or something, but I cannot feel anything when running my finger around the opening.
I got angry today and used blue "gasket maker" silicone on yet another new O-ring and assembled the whole thing (I am really good at it now). I have about had it with mixing up 50:50 expensive G12.
I hate using helpers for seals that should seal as-is. It seems to not leak at the moment (let's see in two days or so).
Aside from the good craftsmanship aspect, is there something I should be worried about, having used the silicone?