Question about 1994 Jeep Grand Cherokee

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Engine Overheating Overheats, but no coolant going into engine, replaced thermostat and cap, but still "redlining" Since no coolant is getting to engine would this be a radiator problem leaking

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  • Jeep Master
  • 20,706 Answers

No other signs just the dash gauge, upset? what if its fibbing?
no steam, no water to ground overflowing overflow tank.
no engine pinging. no lost power, from engine, SIGNS. are key. here.
Did you consider using a IR pyro gun for $20 and find if it is really overheating,? the gun also finds clogged rad tubes, childs play like.
are you loosing coolant. that is when cold actually off the cap
and look down deep in the RAD tank? This matters, most.

which engine,? 2.5,4L or bigger?
what does no coolant going into...., mean.?
it's a loop system.
first off, we need to know does it overheat only parked?
or can you drive it from cold and keep it going and it never overheats
moving fast.?
if the engine stays cool 180F, moving fast , then your stop. and NOW it it overheats, that means the fan is dead.
or a marginal radiator, (Pyro gun to rescue)

Posted on Mar 24, 2014

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Overheating

drain your coolant again, and fill in it on the upper hose not on puke tank. check the water pump also for rotation.

Posted on Sep 06, 2008

  • 4 Answers

SOURCE: 2004 Jeep wrangler 4.0 - 6cyl overheating

I had the same overheating problem in my jeep ! My problem was finaly found out to be the clutch in my fan its a different kind of clutch system it work as this. When your jeep gets warmer the tighter your fan clutch gets .While cool your fan moves slowly. now to test your clutch just warm up your jeep and rev it up a bit if your fan dose not pick up speed then it is sliping.What will come out of this is that you fan will the seez and run full all the time. if you jeep dose not overheat wile moving then it is not your thermo stat period.

Posted on Oct 14, 2008

Benimur
  • 6966 Answers

SOURCE: Engine Temperature Guage on Dashboard indicates overheating

Hi and welcome to FixYa,

Offhand, your described condition indicates a sticking thermostat, that is there is considerable delay before the thermostat opens. It is also possible that there is some restriction wherein the thermostat is not opening completely when the triggering temperature has been reached. As a test and to confirm, you could try temporarily removing the thermostat and operate the engine without one; observe temperature. The side effect of this test is that it would take some time to warm-up the engine, but operationally should not cause anything untoward. Of course, care has to be exercised that the gasket would still be intact.

Good luck and thank you for using FixYa.

Posted on Feb 11, 2009

  • 412 Answers

SOURCE: Engine overheating at high rpms

check the casting on your replacement water pump..4.0l engines require a reverse rotating water pump..may be causing your problem.

Posted on May 16, 2009

buffalonyman
  • 1865 Answers

SOURCE: coolant not flowing to engine, overheating after replace radiator

Remove the thermostat and then try it. If it works then replace t-stat

Posted on Jun 12, 2009

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