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  1. 1

    Scratching head after installing new heads. (Sorry for the pun)

    Ok here goes, stock 1991 Explorer XL, ran well, has noticeably lost power, using coolant between every trip. Truck belongs to my Dad, he says "crush it" I say "NO WAY!" I tore it apart and $1,300 later I'm reassembling it. I cleaned and lightly oiled the lifters, no priming and I also...
  2. 1

    New member from North Carolina

    Hello all, My truck is a 1991 Explorer XL with 135,000 miles. It's mostly stock less the stereo, exhaust and a K&N air filter. I'm in the process of reassembling the top end after installing new heads. The truck was using coolant and three chambers had cracks between the valves. Looking...
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