Re: Overheating and slight rumble when driving over 55mph
>I'm stuck dealing with the problems
> myself and appreciate any pointers.
This engine is just-about bullet proof, but it shouldn't run near the H
mark on the gauge. My 4.9 runs at 210° with the AC On and that shows
'just' past N on the factory gauge. I installed a real temp gauge long
Anyway, I'd look at the water-pump and/or a loose/bad drive belt. Could
be a faulty radiator cap. Possibly the previous owner didn't flush the
system, so the radiator may be somewhat restricted. The symptoms don't
read as a T-stat problem, unless some fool install one up-side
down....which I've seen. T-stats either work or they don't, and there
is no guessing about one not working....lol A new stat is cheap and
easy enough to replace.....as is a new radiator cap. The cap regulates
pressure within the cooling system. Correct pressure is everything to
the cooling system.
You might try flushing the system with a chemical flush. Also, Prestone
make a 'back-flush' kit. This kit enables the system to be
'back-flushed'.....which means the cooling system is flushed opposite
the normal way coolant flows....a good procedure. The kit cost about
$10 and is a simple installation.
Well, I hope something here helps....