Question about 1999 Cadillac DeVille

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What sealer is head gasket sealer

I have already tried bars leaks head gasket sealer it only starts saying engine coolant hot after 15 miles of driving it with the ac on outside temp 105 f degreesone time i drove it 52 miles no problem what so ever istill dont think is a blown head gasket no white smoke out of tail pipe commpression on all cylnders 160lb no water on oil new water pump new radiator new thethermostat dexcooll antifreeze installed iam puzzled .

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  • Cadillac Master
  • 15,575 Answers

Computer glitch , have it checked for DTC'S - diagnostic trouble codes . Not all codes turn on the check engine light . Plus DTC'S for the BCM - body control module won't turn the check engine light on at all , could turn on a yellow wrench symbol on the insturment cluster .
Stop putting head gasket sealer into the cooling system , could clog it up.

Posted on Sep 13, 2017

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6ya6ya

6ya staff

  • 2 Answers

SOURCE:

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Posted on Jan 02, 2017

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Anonymous

  • 396 Answers

SOURCE: Coolant leaks, oil pan gaskets leak started

Check temp control sending unit and thermostat.

Posted on Jul 17, 2009

Anonymous

  • 69 Answers

SOURCE: Same problem , car has only 86,000 miles

replace that thermostat again...flush radiator any way...then see how it runs...

Posted on Aug 28, 2009

luke wooldridge

  • 93 Answers

SOURCE: I have white smoke coming from the tail pipe

hi... it all depends on the colour of the smoke... usualy blueish smoke will mean it is oil burning and your piston rings may be getting worn if it is black then it might be running too rich etc.. a little bit of water is fine infact usualy it is a good sign that your engine is not running rich or lean so it is pointing towards oil seals... also if it was running rich it would probably do it more when it was cold

Posted on Feb 11, 2010

Testimonial: "Thanx lukewooly. The digital does does say check oil level now that I think about it.Very helpful. Don't wanna spend more than the car is worth."

Navmesha

Navin Sharma

  • 315 Answers

SOURCE: hello my 2000 cadillac

  • flush radiator
  • Check if fan kicks in
  • Remove cap and see if coolant circulates while the engine is running
  • Get it pressure tested

Posted on Aug 04, 2011

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Well all signs point to the initial stage of head gasket leak.

The piston(s) push the air/gas mixture into the coolant passage in the engine head.

You are lucky to able to catch it before oil coolant cross mix and blowing white after warm.

hydrocarbon HC test is a must!



I will not drive the truck until you check for freeze plugs leaks,change thermostat and radiator cap.



There is a very effective head gasket sealer call SteelSeal.

You will need two bottles.

After everything is under control then you must do a coolant system pressure test.
=====

Fixya just published my coolant system inspection tip.


If you are a DIY\'er then please take a look HERE

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