Join Date: May 2006
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Re: Thermostat part number
These will work. But,they are not the by-pass type t-stat.
A better fit is the napa# 154 It is a 1990 mazda mpv with the 3.0L V-6
this is still not a perfect fit. It's a 64mm not a 63mm. I had to do a little file'n and had to cut 2 coils off the by-pass spring to match the stock hemi spring pressure. It's 180* stat. and has the big flow opening.
My 203* (stock) stat is back in
The first tank of gas I did not notice mpg loss. By the 2nd and 3rd tank mpg's were bad.
I have a 5.7 ram not a 6.1 You might be ok or not, just beware. If I bought a chip to tell the ecm that 180* was full op temp it would(should)work.