Dear Tom and Ray,
I have a 1995 Jeep Cherokee with 115,000 miles on it. It has had overheating problems in the past and once, four years ago, blew a head gasket that required me to machine the head. Since that time it has had little overheating problems that have never resulted in a breakdown. It does result in me constantly watching the temperature gauge.
When the weather got cold in the past few weeks I noticed an awful lot of exhaust fumes coming from my heater and defroster. The car is only drivable in the cold with the heater off and the windows rolled down-- which is fine with me but not with my passengers. Every other aspect of this car works well including, most importantly, the four-wheel drive.
I am taking it to my mechanic on Wednesday but I have diagnosed, in advance, a blown head gasket or cracked head or something like that. I found a $100 product on the Internet that they call "a two-part ceramic fiber elemental carbon and iron metallic alloy compound suspended in a liquid" that I am supposed to pour into my flushed out radiator. I am then supposed to drive it hard to heat it up, let it cool down and do it again repeatedly to seal the leak. Then I will flush it, refill the radiator and drive off into bliss.
At this point, it's either do this or donate it to my unknowing innocent public radio station.
1. This sounds too good to be true, is it?
2. I am going to walk into the mechanics shop and ask them to do it. Do you think my mechanic will have a problem doing this? Should I talk to them about it beforehand or just drop it on them?