In reply to a message from Dwomby sent Tue 7 Apr 2009:
Dave:
I add my recession valued .02.
When I lost my engine, the guage was reading right at the 90 C mark.
the weather was very hot and this was a maiden voyage into the hot
weather country, so I was on the alert. sudden;ly, it shot waay
over and smoked and made a weird noise and quit. I coasted off the
freeway. it would not turn over. I let it cool a bit and added a
lot of water. It never ran again, I finaly found a small hose under
the manifold that had split. The point is that the guage reads only
at one point on the engine, and relies on flow to get an overall
value. Thusly the infra red guages are invaluble to get values at
different points and corroborate the fascia guage.
When engines are really hot, one can tell it. there is a lot of
gurgling in the system. Water boils at 212f, unless it is under
pressure, when the point is higher. so, if there is gurgling the
temp is beyopnd thast altered 212. No gurgle, it is less than that.
I guess my next point is whether or not the engine is beyond
optimum temperature or not and the gusge is reading a false
number.A reducnt guage for verification would be interesting to
plumb in mechnanicaly or electricly.
Nest, is that most engines are not drained completely by the
factory drain. The calculations to estimate residual amounts can be
misleading.
Many years ago, kits were sold to flush engine cooling systems.
They consisted of a T fitting to go in a heater line with a garden
water hose connection. The other part was a spout to go into the
radiator filler. Turn on the heater, start the engine adjust the
water hose to get a steady spill over the filler and run til clear.
if you have other than water in the system, it is environmentaly
unfriendly.
A home revers flush somewhat replicates a service once available
along highways in the deseert. Open both hoses, Remove the
thermostat. Clamp in a garden hose with a pressure nozzle, turn on
the water and purge the block under city pressure usually about 50
psi.The desert station used a closed version and introduced a
cleaner in the first stage and then flushed in clear.
I suggest the guage verification as the next logical step as you
have already done most if not all of the usual oheat steps.
Don’t overheat and loose it as did I!
Good luck
Carl–
Carl Hutchins 1983 Jaguar XJ6 with LT1 and 1994 Jeep Grand
Walnut Creek, California, United States
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