I’ll try to keep this short without omitting anything that might be pertinent. The truck was given to me by my stepdad. He had it about four months but only drove it every once in a while. It always started up and never ran hot, but something was not quite right, a rough idle and a bit of a missfire/momentary loss of gusto.
When my boyfriend and I changed the oil there appeared to be 6qts instead of the called for 4qts. We though someone had just gotten a little over eager with the oil. Anyway, he took a look at the spark plugs and changed them as they looked terrible (evidence of advanced timing/running lean/vacuum leak if I remember correctly). After the new plugs, adjusting the timing, the A/O mixture, and not finding a vacuum leak (I know that doesn’t necessarily mean there isn’t one) it sounded a bit better but something was still not quite right. We drove about 100 miles then took it to DEQ and, no surprise, we didn’t pass. He pulled the plugs again and all but one looked fine. Fast forward a week and he’s under the hood to replace the head gasket and antifreeze starts poring out of cylinder three (the same one with the sad looking plug).
From what I’ve read, at the very least the head gasket needs to be replaced (which we were doing anyways). I guess I’m just trying to find out if it could be something else instead or in addition. The confusing part is that the truck runs pretty darn good compared to other people’s cars that have had antifreeze in their cylinders. It doesn’t smoke, it starts up without hesitation every time, the temp gauge never even gets close to the halfway mark even after an 80 mile drive.
Any help/suggestions would be greatly appreciated.
Edited to add in case it matters: the check engine light is not lit after starting the truck.