Question about 1994 Lexus Es 300

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Head gasket is there any sensors that i need to know about before changing the head gasket

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  • yadayada
    yadayada May 11, 2010

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Sometimes when you reassemble heads the knock sensors will set a code. it best to replace both sensors and short harness while your there. they set in the valley of engine block.

Posted on May 21, 2009

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I have A 1986 Nissan sentra that has been giving me problems starting. I've changed the wires,plugs, roter cap and button, had A bad catilitic converter removed it and am still hardly starting and when...


Can not use a vehicle without a converter

You have no fuel control, without it

Where did the oxygen sensors go?

Sounds like you have zero vehicle experience
& need a repair shop

Head Gasket a possible

Compression test won't tell you the complete story

Need to do the proper tests for a head gasket, as well
as Cylinder Leak Down Test

Dec 04, 2014 | Nissan Sentra Cars & Trucks

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My grand am still overheats even after i changed the termostat and water pump plus, the fan only runs when the temp sensor is unplugged


I had the same problem with my 1999 grand am .I changed water pump, thermostat. I heard the Pontiac engines , 3.4 had overheating problems one is the intake gasket if your losing water but don't know were its going its leaking at the intake gasket and burning off or if you check the oil cap or the dip stick and theres a milky substance on them it would be your head gasket I had to change my head gasket and while I was there I changed the intake gasket too. I haven't had any problems sence I changed them hope this helps. Jack

Jun 11, 2014 | 1997 Pontiac Grand Am

1 Answer

Changed head gasket, now won't start.


I would need to know the actual code numbers to comment, but in general those components would not keep the engine from starting.
Have you checked compression, spark and fuel pressure ?

Jun 09, 2013 | 2001 Chevrolet Cavalier

1 Answer

I have 1994 grand cherokee Jeep, Jeep heats up and will not start the temp gage is not working; i have replaced the thermo sts sensor and gasket. The temp gage on panel still doesnt work... My Jeep also...


white /light blue smoke is a sign of a blown head gasket or intake gasket when you changed the oil filter was it creamy cause if it was then is a head gasket

Apr 08, 2011 | 1994 Jeep Grand Cherokee

1 Answer

Leaking oil put of tail pipe, is the cooling sensor important, head gasket blown how do you know


Never seen oil come from tail pipe (unless a piston has a broken ring or a hole burned in it.) Cooling sensor tells the computer the engine temp and the computer turns the fan on through the fan relay. Very important for it to work. A blown head gasket will make the engine overheat, can cause white smoke from tailpipe, coolant loss and extremely rough running. Also can cause coolant in engine oil or oil in radiator. What you may be seeing may be water mixed with carbon from the inside of the pipe. Excessive water coming form pipe is also a head gasket symptom. A compression test or cylinder leakdown test or a radiator hydrocarbon test will tell you if gasket has failed.

May 14, 2009 | 1996 Jeep Grand Cherokee

2 Answers

1999 volvo s70 overheating


Yes this has happened to me. The coolant temperature sensor tells the radiator fan when to turn on to cool the radiator. When this sensor is faulty your vehicle is overheating and it can cause a blown head gasket if not replaced. I hope this was helpful.

Feb 03, 2009 | 2000 Volvo S70

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