Quote:
Originally Posted by cRiPpLe_rOoStEr
Not sure about Mexico, India and South Africa, but in Brazil many owners of Ford cars with the Zetec-Rocam engine say replacing the thermostatic valve by one with an aluminium housing instead of plastic improves cooling noticeably.
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That could be.
On the other hand, there are also those cases of those who a couple people have an overheating problem and then everyone starts making their own conclusions. After a while there are ideas everywhere, many of which are complete myths.
Take the aircooled VW's for an example. There were those who'd remove the thermostat as soon as they bought a VW and there were those that swore the thermostat system actually helped cool the engine even better by directing the air towards the heads.
In my expeperience, with a mostly stock system I was climbing up long steep mountain passes on hot summer days and never broke 350°F head temps nor 210°F oil temps in the 1600cc VW Super Beetle.