I have a 1990 jeep Cherokee lerado that has the full tank up by the fire wall. It was getting hot on me all the time very easy. So I put a new thermostat in it and filled it up and let the thermostat
Open and made sure it's full. But
now if I take off down the road and
get about 20 miles it starts rising
above 210 I have dual fans ones the
manual and the other is electric and
both work perfectly. My question is
that there's a brass valve looking
thing on to of the fill jug and I'm not
sure what it's for. And people have
also told me to poke a small hole int
the top of the fill tank cap. Can any
one help. Lol