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What is causing my 2007 Hino diesel truck to overheat Mechanic says radiator and EGR valve are good might be the head gasket what else

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  • Cars & Trucks Master
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A simple thermostat that is the basic stuck thermostat prevent coolant to circulate from the engine to the radiator so coolant stay in the engine and eventualy boil

Posted on Apr 07, 2015

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Posted on Jan 02, 2017

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I have a overheating problem with my 1993 acura legend and i just replaced the thermostat and the radiator. the fans work fine there is no leak and there is no head gasket problem but it keeps on taking...


How do you know that the head gasket is good? even with a bad thermostat it would not overheat in 3-5 min, a bad fan or relay would not make it overheat so fast , this sounds like a bad waterpump that has a bad impeller that does not circulate the coolant , but would not take coolant , if you are going through coolant and overheating that fast i would say head gasket but if you were not loosing coolant i would say to check the water pump impeller, i have seen them rust away or break,

Oct 30, 2012 | 1994 Acura Legend

1 Answer

White stuff under oil filler lid


Head gasket between engine block and valve header is leaking coolant into engine oil crank case. Expect a major costly repair because mechanic has to remove many parts to replace head gasket. If you have not overheat the engine, it may cost less. Because overheat engine will damage other components such as radiator,water pump, main seal, oil seal, timing belt.

Feb 07, 2012 | Cars & Trucks

1 Answer

I have a 2006 f250 diesel, and I have alot of white smoke pouring out the tailpipe...


Bad EGR Cooler, Valve or blown head gaskets. Not a job u can do your self, Take in to a qualified DIESEL mechanic that is familiar with 6.0's not all Ford Dealers have a Diesel Tech.

Jan 01, 2011 | 2006 Ford F-250 Super Duty

2 Answers

94 Jetta w/2.0 engine overheats.I took it to a mechanic and he said my thermostat was fine.So what else could be causing it to overheat??And it does have a small oil leak too but I can't pin point it.


Overheating could be anything in the cooling system. Thermostat is out, could be radiator, water pump, broken belts which cause the water pump to not move, cylinder head warped, cracked, or the cylinder head gasket.

Aug 06, 2010 | Volkswagen Jetta Cars & Trucks

2 Answers

The radiator of my 2003 isuzu trooper has a mixture of water and diesel now, and per mechanic, we have to replace the overhaul gasket kit and cylinder head (though without testing), can we just proceed...


how did the diesel get in there? are you sure its diesel fuel or is it motor oil? then it could be head gasket problem. Or trans fluid, which would make it milky pink? Then it could be the trans cooler in the radiator leaking. If someone accidently put diesel fuel in it then just flush it out. If it has been in there long enough to start ruining hoses then replace those. why does he say gaskets? how does it run? does it overheat? then maybee head gaskets. and resurface heads.

Oct 20, 2009 | 1992 Daihatsu Charade

1 Answer

How do you replace egr valve in a 2005 dodge caravan


REMOVAL - 2.4L The EGR valve and Electrical EGR Transducer are serviced as an assembly.
  1. Disconnect vacuum tube from electric EGR transducer. Inspect vacuum tube for damage.
  2. Remove electrical connector from solenoid.
  3. Remove EGR tube bolts from EGR valve.
  4. Remove EGR valve from cylinder head adaptor.
  5. Clean gasket surface and discard old gasket. Check for any signs of leakage or cracked surfaces. Repair or replace as necessary

INSTALLATION - 2.4L The EGR valve and Electrical EGR Transducer are serviced as an assembly.
  1. Assemble EGR valve with new gasket onto the cylinder head adaptor.
  2. Loose assemble the bolts from EGR valve to EGR tube.
  3. Loose assemble the bolts from EGR valve to cylinder head.
  4. Tighten bolts from EGR valve to cylinder head to 22.8 N·m (200 ±25 in. lbs.) torque.
  5. Tighten bolts from EGR valve to EGR tube to 11.9 N·m (105 ±20 in. lbs.) torque.
  6. Reconnect vacuum hose and electrical connector to electrical EGR transducer.

Aug 03, 2008 | 2007 Dodge Caravan SXT Minivan New Cars

2 Answers

Transmission oil in coolant?


Trans fluid can get into radiator by the trans cooler built into radiator side, automatics...
Engine oil can come thru cracked block, head gaskets

Which oil is it? Either way it needs to be fixed.

Typically with automatic trans they can overheat and cause engine temp issues, because they cool thru the radiator using an in tank cooler along side.
IF you overheat the trans you CAN overheat engine
IF you overheat the engine you CAN overheat the trans

Jul 17, 2008 | 2001 Chrysler Town & Country

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