overheating

2001 CHRYSLER 300
148,000 MILES • 3.5L • 6 CYL • FWD • AUTOMATIC
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TOM FLATAU
  • MEMBER
  • 10 POSTS
Still over heats, on going problem,new head gaskets new, thermostat cleaned Rad new water pump, no codes no bubbles good compression, reading Tech article is it possibility catalytic converter that is creating back pressure causing heat to remain in the engine.
Mar 31, 2017 at 12:44 PM
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JOHNNY G.JR
  • ✓Experienced Mechanic
  • 320 POSTS
are cooling fans operational?? If exhaust was restricted by a partially clogged converter,exhaust would sound like a hissing,
Mar 31, 2017 at 5:35 PM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
try bleeding cooling system see pics for instructions on how to do it. May have an air lock in it causing problem.
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Mar 31, 2017 at 11:55 PM
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TOM FLATAU
  • MEMBER
  • 10 POSTS
do I need special tool 8195 or will this work with out it.what purpose does the hose that goes toward the upper air plenum serve.
Apr 1, 2017 at 4:13 AM
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TOM FLATAU
  • MEMBER
  • 10 POSTS
The fans work on both low and high speed.
Apr 1, 2017 at 4:15 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
the special tool is a funnel
Apr 1, 2017 at 5:32 AM
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TOM FLATAU
  • MEMBER
  • 10 POSTS
There was some air in system but still run very warm, must run heater on high or goes in red, Fans running on high all the time when gage goes over half
Apr 4, 2017 at 7:56 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
check radiator for cold spots when engine warm, fans disconnected, if you feel any cold spots the rad is no good. shold be same temp all over.
Apr 4, 2017 at 8:21 AM
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TOM FLATAU
  • MEMBER
  • 10 POSTS
Removed fans,just got Rad back from shop,they said ran wire down core, flushed it out, said
cant be bad, felt like anti freeze was'nt moving out toward the block, took thermastat out again, opened in hot water at 190, is there a spot were I could have blockage in the block? Did have a cold spot in the middle below the bottom hose which is 5in up. never got hot past the outlet, was very hot at the inlet. Don't know any history on this motor, upper hose got very hot and hard as motor warmed,no blockage in the two rad hoses

Apr 5, 2017 at 1:41 PM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
there cold be a blockage in block but you wouldn't know unless the heads were pulled and you can see inside passages.
Apr 5, 2017 at 10:45 PM
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