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I was told by people on the Humvee forums and I told that to this mechanic I have never used before and he said ok 3k to change head gaskets.

The mechanic said I have an air cooled trans cooler no coolant runs through it. I have the dual oil/trans cooler how can coolant get in there?

He didn’t check anything first he went on my saying it’s prob head gaskets. I have no line on a motor you know anyone that’s selling one? I have idled the truck with the cap off the overflow and didn’t see any bubbles

No he said visually he sees nothing wrong with heads or head gaskets and don’t see how oil and coolant can mix in the heads. He said it has to be a crack in the cooling jacket somewhere that’s it says he don’t see it.

Im stuck he said he has no way to confirm 100% it’s a crack and if I want the heads tested I would have to pick them up and pay and find someone to test them. Or he can put it back together for the 3k labor he charges for head gaskets and I leave. Or I can buy a new motor for him to put in

So you think it’s a waste of time and money to have the heads tested?

When I drained the coolant it came out like mayonnaise that yellowish color like tar. He has the heads off now. I wondering if that’s why I been getting like 6-7 mpg and everyone else on the forums claim 10-12 mpg. I also have to add a half court oil every 3 months.

I can really use some help I have a 6.5 na rebuild by meltons is 09 if the odometer was t changed only has 6k miles I noticed oil in the coolant 9 months ago no coolant in oil. Was told head gaskets my mechanic has the heads off and say they look fine and the gaskets that he don’t see how oil in...