|
The four-piece grille block for my Cummins-engined pickup is what I install for temps above 41F (below that is the full coverage MOPAR under hood "winter-front") and depending how high ambient temps are (and whether I hook up the 35' trailer), it helps in warmup, but more importantly keeps coolant temps higher when lightly loaded on the highway.
I leave the upper two pieces in place during hottest months. I was advised by a Cummins engineer to not allow higher than normal op temp; will admit I sorta cross that line, but not in a serious fashion.
I believe that mpg improvements are marginal, but faster temp rise -- and temp stability -- make it worthwhile.
Mine is cut from a heavy plastic. Uses two short bolts, fender washers and wing nuts per piece to hold against grille.
.
|